42124_P1_RC.pdf

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Human Space Flight Technical Integration Contract (HSFTIC) Federal contract opportunity
Solicitation number
80JSC019R0023
Issued by
National Aeronautics and Space Administration Johnson Space Center

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This solicitation is for a Human Space Flight Technical Integration Contract (HSFTIC). NASA/JSC will issue a Request for Proposal for technical integration services to support human space flight programs. The procurement is a total small business set-aside with a NAICS code of 541715 and size standard of 1,250 employees. The anticipated RFP release date is November 1, 2019 with a proposal due date of December 11, 2019. The solicitation and any amendments will be available on NASA's procurement website and Federal Business Opportunities site. Prospective offerors must notify the agency of their intent to submit a proposal. All technical questions must be submitted in writing. The Center Ombudsman information is provided.

42124 P1 RC

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SSP 42124, Part 1, Revision C

SPACE STATION PROGRAM

INTEGRATED TRUSS SEGMENT S0

TO NODE 2 INTERFACE CONTROL

DOCUMENT PART 1

Revision C November 17, 2005

Type 4 Approved by NASA

International Space Station Program

National Aeronautics and Space Administration International Space Station Program Johnson Space Center Houston, Texas Contract No. NAS15−10000

SSP 42124, Part 1, Revision C November 17, 2005 ii

REVISION AND HISTORY PAGE

REV. DESCRIPTION PUB.

DATE

− Initial Release in accordance with DR VE−06 12−08−94

Change 1, IRN 0145 (REFRENCE SSCD 000145 EFF. 10−31−95) 06−14−96

Change 2, IRN 0002 (REFRENCE SSCD 000102 EFF. 11−04−94) 10−30−96

Change 3, IRN 0008 per CCR 000111 06−19−97

Change 4, IRN 0001 per CCR 000263 06−19−97

A Revision A released per SSCN 001252 (Release to File) 02−04−99

This revision incorporates the following PIRNs/IRNs associated with the appropriate SSCNs:

PIRN 42124−0006 IRN 0145 SSCN 000145

PIRN 42124−0001 IRN 0001 SSCN 000263

PIRN 42124−0002 IRN 0001 SSCN 000263

PIRN 42124−0004 IRN 0001 SSCN 000263

PIRN 42124−0007D IRN 0002 SSCN 000102

PIRN 42124−0009 IRN 0002 SSCN 000102

PIRN 42124−0008A IRN 0008 SSCN 000111

PIRN 42124−0011A N/A SSCN 001252

PIRN 42124−0012A N/A SSCN 000311

PIRN 42124−0013A N/A SSCN 000249

PIRN 42124−0014 N/A SSCN 000561

B Revision B released per SSCD 001208, EFF. 04−02−98 02−04−99

Incorporate the following approved PIRNs:

42124−AS−0004B, 42124−NA−0002A, 42124−NA−0003B, 42124−NA−0004B,

42124−NA−0006

C Revision C released per SSCD 009745, EFF. 03−30−06 07−14−06

This revision incorporates the following approved PIRNs/IRNs associated with the appropriate SSCNs:

PIRN 42124−AS−0008 IRN N/A SSCN 009745

PIRN 42124−NA−0001 IRN N/A SSCN 009745

PIRN 42124−NA−0007 IRN N/A SSCN 000737

PIRN 42124−NA−0008AIRN N/A SSCN 002559

PIRN 42124−NA−0009 IRN N/A SSCN 002559

PIRN 42124−NA−0010CIRN N/A SSCN 009745

PIRN N/A IRN 0004 SSCN 001262

PIRN N/A IRN 0003 SSCN 001662

PIRN N/A IRN 0006 SSCN 001711

PIRN N/A IRN 0009 SSCN 001920

PIRN N/A IRN 0007 SSCN 001929

PIRN N/A IRN 0014 SSCN 001938

PIRN N/A IRN 0010 SSCN 002107

PIRN N/A IRN 0017 SSCN 002189

iii

REVISION AND HISTORY PAGE

REV. DESCRIPTION PUB.

DATE

PIRN N/A IRN 0013 SSCN 002199

PIRN N/A IRN 0011 SSCN 002345

PIRN N/A IRN 0012 SSCN 002485

PIRN N/A IRN 0022 SSCN 002588

PIRN N/A IRN 0016 SSCN 003213

PIRN N/A IRN 0023 SSCN 003282

PIRN N/A IRN 0018 SSCN 003690

PIRN N/A IRN 0019 SSCN 003746

PIRN N/A IRN 0021 SSCN 003827

PIRN N/A IRN 0020 SSCN 004676

ERU: /s/ J. Rivas 07−14−06 iv v

PREFACE

The contents of this doucment are intended to be consistent with the tasks and products to be prepared by Program participants. The Itegrated Truss Segment (ITS) S0 to Node 2 Interface Control Document (ICD) shall be implemented on all new International Space Station (ISS) contractual and internal activities and shall be included in any existing contracts through contract changes. This document is under the control of the Space Station Control Board and any changes or revisions will be approved by the Program Manager (or statement to indicate the delegated authority, i.e. Space Staion Analysis and Integration team (SSAIT), Vehicle Analysis and Integration Team (VAIT)).

vi vii

INTERNATIONAL SPACE STATION PROGRAM

INTERNATIONAL SPACE STATION PROGRAM

INTEGRATED TRUSS SEGMENT S0 TO NODE 2

November 17, 2005

CONCURRENCE

Warren England AG−92−J3ES

PREPARED BY: PRINT NAME ORGN

/s/ Warren England 07/06/06

SIGNATURE DATE

CHECKED BY (BOEING): Quentin Henry AG−92−J3ES

PRINT NAME ORGN

/s/ Quentin L. Henry 07/06/06

SIGNATURE DATE

APPROVED BY (NASA): Chau Hong NASA/OM

PRINT NAME ORGN

/s/ Chau Hong 07/6/06

SIGNATURE DATE

DQA: Merry McClain AG−92−J3ES

PRINT NAME ORGN

/s/ Merry McClain 7/7/06

SIGNATURE DATE

viii

Node 2 Project Concurrence

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Date ix

INTERNATIONAL SPACE STATION PROGRAM

INTERNATIONAL SPACE STATION PROGRAM

INTEGRATED TRUSS SEGMENT S0 TO NODE 2

LIST OF CHANGES

November 17, 2005

All changes to paragraphs, tables, and figures in this document are shown below:

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APPROVAL

AUTHORITY NO.

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ENTRY

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PARAGRAPH(S), TABLE(S)

AND FIGURE(S)

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SSCN 009745

SSCN 000737

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Para 3.2.1.4.4, 3.2.2.4.4 Front Matter Para 3.2.1.3.1, 3.2.2.3.1 Table 3.2.1.3.1.1−1 Figure 3.2.1.3−1

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Table 3.2.1.3.1.1−1

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Table 3.2.1.3.1.2−1

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Table 3.2.1.2.2.1.1−1 Table 3.2.2.2.2.1.1−1

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TABLE OF CONTENTS

PARAGRAPH PAGE

1.0 INTRODUCTION 1 - 1

1.1 PURPOSE 1 - 1

1.2 SCOPE 1 - 1

1.3 PRECEDENCE 1 - 1

1.4 DELEGATION OF AUTHORITY 1 - 1

2.0 DOCUMENTS 2 - 1

2.1 APPLICABLE DOCUMENTS 2 - 1

2.2 REFERENCE DOCUMENTS 2 - 3

3.0 INTERFACES 3 − 1

3.1 GENERAL 3 − 1

3.1.1 INTERFACE DESCRIPTION 3 − 1

3.1.1.1 ITS S0 DESCRIPTION 3 − 1

3.1.1.2 NODE DESCRIPTION 3 − 1

3.1.1.3 INTERFACE PLANE DESCRIPTION 3 − 1

3.1.1.4 COORDINATE SYSTEMS 3 − 1

3.1.1.5 ENGINEERING UNITS 3 − 2

3.1.1.6 TOLERANCE 3 − 2

3.1.1.7 ITS S0 INTERFACE FUNCTIONS 3 − 2

3.1.1.8 NODE 2 INTERFACE FUNCTIONS 3 − 2

3.1.2 INTERFACE RESPONSIBILITIES 3 − 2

3.1.2.1 RESPONSIBILITY FOR ITS S0 3 − 2

3.1.2.2 RESPONSIBILITY FOR NODE 2 3 − 3

3.1.2.3 RESPONSIBILITY FOR UTILITY CONNECTORS 3 − 3

3.2 INTERFACE REQUIREMENTS 3 − 3

3.2.1 ITS S0 INTERFACE REQUIREMENTS 3 − 3

3.2.1.1 INTERCONNECTING UTILITY HARDWARE 3 − 3

3.2.1.1.1 ACCESSIBILITY 3 − 3

3.2.1.1.2 ELECTRICAL CONNECTORS 3 − 3

3.2.1.1.3 UTILITY CABLE SPECIFICATIONS 3 − 3

3.2.1.1.3.1 VIDEO CABLE SPECIFICATIONS 3 − 3

3.2.1.1.3.2 HEAT EXCHANGER INSTRUMENTATION CABLES 3 − 3

3.2.1.1.3.3 ELECTRICAL POWER CABLE SPECIFICATIONS 3 − 4

3.2.1.1.4 GROUNDING 3 − 4

3.2.1.1.5 SHIELD TERMINATION OF ELECTRICAL CABLES 3 − 4

3.2.1.1.6 FLUID CONNECTORS 3 − 4

3.2.1.1.7 REDUNDANT UTILITY INTERFACES 3 − 4

3.2.1.2 ELECTRONIC INTERFACES 3 − 4

3.2.1.2.1 VIDEO SIGNALS 3 − 4

xi

TABLE OF CONTENTS − CONTINUED

PARAGRAPH PAGE

3.2.1.2.1.1 OPTICAL PULSE FREQUENCY MODULATION (PFM) NATIONAL TELEVISION

STANDARDS COMMITTEE (NTSC) VIDEO SIGNAL CHARACTERISTICS 3 − 4

3.2.1.2.1.1.1 OPTICAL PFM NTSC VIDEO SIGNAL RECEIVE POWER LEVELS 3 − 4

3.2.1.2.1.2 DELETED 3 − 5

3.2.1.2.1.3 DELETED 3 − 5

3.2.1.2.1.4 DELETED 3 − 5

3.2.1.2.2 SYNC AND CONTROL SIGNALS 3 − 5

3.2.1.2.2.1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL CHARACTERISTICS 3 − 5

3.2.1.2.2.1.1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL TRANSMIT

POWER LEVELS 3 − 5

3.2.1.2.2.2 DELETED 3 − 6

3.2.1.2.2.3 DELETED 3 − 6

3.2.1.2.2.4 DELETED 3 − 6

3.2.1.2.3 INSTRUMENTATION AND CONTROLS 3 − 6

3.2.1.2.3.1 HEAT EXCHANGER ORBITAL REPLACEABLE UNITS 3 − 6

3.2.1.2.3.1.1 HX ORU CONTROL SIGNALS 3 − 6

3.2.1.2.3.1.1.1 NODE 2 HX ORU’S 3 − 6

3.2.1.2.3.1.1.2 JEM HX ORU’S 3 − 6

3.2.1.2.3.1.1.3 APM HX ORU’S 3 − 7

3.2.1.2.3.1.2 HX ORU INSTRUMENTATION/SENSOR SIGNALS 3 − 7

3.2.1.2.3.1.2.1 HX ORU VALVE POSITION SENSORS 3 − 7

3.2.1.2.3.1.2.1.1 NODE 2 HX ORU’S 3 − 7

3.2.1.2.3.1.2.1.2 JEM HX ORU’S 3 − 7

3.2.1.2.3.1.2.1.3 APM HX ORU’S 3 − 8

3.2.1.2.3.1.2.2 HX ORU TEMPERATURE SENSORS 3 − 8

3.2.1.2.3.1.2.2.1 NODE 2 HX ORU’S 3 − 8

3.2.1.2.3.1.2.2.2 JEM HX ORU’S 3 − 8

3.2.1.2.3.1.2.2.3 APM HX ORU’S 3 − 9

3.2.1.3 ELECTRICAL INTERFACES 3 − 9

3.2.1.3.1 SUPPLY POWER 3 − 10

3.2.1.3.1.1 POWER QUALITY 3 − 10

3.2.1.3.1.2 FAULT PROTECTION 3 − 10

3.2.1.3.1.3 DELETED 3 − 11

3.2.1.3.1.4 DELETED 3 − 11

3.2.1.4 FLUID INTERFACES 3 − 11

3.2.1.4.1 SUPPLY COOLANT 3 − 11

3.2.1.4.2 RECEIVE COOLANT 3 − 12

3.2.1.4.3 DELTA PRESSURE 3 − 12

3.2.1.4.4 VOLUME ALLOCATION 3 − 12

xii

TABLE OF CONTENTS − CONTINUED

PARAGRAPH PAGE

3.2.1.5 STRUCTURAL INTERFACE 3 − 12

3.2.1.5.1 CREW INDUCED LOADS 3 − 12

3.2.1.5.1.1 DELETED 3 − 13

3.2.1.5.2 BONDING 3 − 13

3.2.1.5.3 DELETED 3 − 13

3.2.1.5.4 MATERIALS AND FINISHES 3 − 13

3.2.1.5.5 DELETED 3 − 14

3.2.1.6 ENVIRONMENTS 3 − 14

3.2.1.6.1 ELECTROMAGNETIC COMPATIBILITY 3 − 14

3.2.1.6.2 ELECTROSTATIC DISCHARGE 3 − 14

3.2.1.6.3 CORONA 3 − 14

3.2.2 NODE 2 INTERFACE REQUIREMENTS 3 − 14

3.2.2.1 INTERCONNECTING UTILITY HARDWARE 3 − 14

3.2.2.1.1 ACCESSIBILITY 3 − 14

3.2.2.1.2 ELECTRICAL CONNECTORS 3 − 14

3.2.2.1.3 UTILITY CABLE SPECIFICATIONS 3 − 14

3.2.2.1.3.1 VIDEO CABLE SPECIFICATIONS 3 − 14

3.2.2.1.3.2 HEAT EXCHANGER INSTRUMENTATION CABLES 3 − 15

3.2.2.1.3.3 ELECTRICAL POWER CABLE SPECIFICATIONS 3 − 15

3.2.2.1.4 GROUNDING 3 − 15

3.2.2.1.5 SHIELD TERMINATION OF ELECTRICAL CABLES 3 − 15

3.2.2.1.6 FLUID CONNECTORS 3 − 15

3.2.2.1.7 REDUNDANT UTILITY INTERFACES 3 − 15

3.2.2.2 ELECTRONIC INTERFACES 3 − 15

3.2.2.2.1 VIDEO SIGNALS 3 − 15

3.2.2.2.1.1 OPTICAL PFM NTSC VIDEO SIGNAL CHARACTERISTICS 3 − 15

3.2.2.2.1.1.1 OPTICAL PFM NTSC VIDEO SIGNAL TRANSMIT POWER LEVELS 3 − 15

3.2.2.2.1.2 DELETED 3 − 16

3.2.2.2.1.3 DELETED 3 − 16

3.2.2.2.1.4 DELETED 3 − 16

3.2.2.2.2 SYNC AND CONTROL SIGNALS 3 − 16

3.2.2.2.2.1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL CHARACTERISTICS 3 − 16

3.2.2.2.2.1.1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL RECEIVE POWER LEVELS 3 − 16.

3.2.2.2.2.2 DELETED 3 − 17

3.2.2.2.2.3 DELETED 3 − 17

3.2.2.2.2.4 DELETED 3 − 17

3.2.2.2.3 INSTRUMENTATION AND CONTROLS 3 − 17

3.2.2.2.3.1 HEAT EXCHANGER ORBITAL REPLACEABLE UNIT 3 − 17

xiii

TABLE OF CONTENTS − CONTINUED

PARAGRAPH PAGE

3.2.2.2.3.1.1 HX ORU CONTROL SIGNALS 3 − 17

3.2.2.2.3.1.1.1 NODE 2 HX ORU’S 3 − 17

3.2.2.2.3.1.1.2 JEM HX ORU’S 3 − 17

3.2.2.2.3.1.1.3 APM HX ORU’S 3 − 17

3.2.2.2.3.1.2 HX ORU INSTRUMENTATION/SENSOR SIGNALS 3 − 18

3.2.2.2.3.1.2.1 HX ORU VALVE POSITION SENSORS 3 − 18

3.2.2.2.3.1.2.1.1 NODE 2 HX ORU’S 3 − 18

3.2.2.2.3.1.2.1.2 JEM HX ORU’S 3 − 18

3.2.2.2.3.1.2.1.3 APM HX ORU’S 3 − 18

3.2.2.2.3.1.2.2 HX ORU TEMPERATURE SENSORS 3 − 19

3.2.2.2.3.1.2.2.1 NODE 2 HX ORU’S 3 − 19

3.2.2.2.3.1.2.2.2 JEM HX ORU’S 3 − 19

3.2.2.2.3.1.2.2.3 APM HX ORU’S 3 − 19

3.2.2.3 ELECTRICAL INTERFACES 3 − 19

3.2.2.3.1 RECEIVE POWER 3 − 19

3.2.2.3.1.1 POWER QUALITY 3 − 19

3.2.2.3.1.2 DELETED 3 − 19

3.2.2.3.1.3 DELETED 3 − 19

3.2.2.3.1.4 DELETED 3 − 19

3.2.2.4 FLUID INTERFACES 3 − 19

3.2.2.4.1 RECEIVE COOLANT 3 − 19

3.2.2.4.2 RETURN COOLANT 3 − 20

3.2.2.4.3 DELTA PRESSURE 3 − 20

3.2.2.4.4 VOLUME ALLOCATION 3 − 20

3.2.2.5 STRUCTURAL INTERFACE 3 − 20

3.2.2.5.1 CREW INDUCED LOADS 3 − 20

3.2.2.5.1.1 DELETED 3 − 20

3.2.2.5.2 BONDING 3 − 20

3.2.2.5.3 DELETED 3 − 20

3.2.2.5.4 MATERIALS AND FINISHES 3 − 20

3.2.2.5.5 DELETED 3 − 21

3.2.2.6 ENVIRONMENTS 3 − 21

3.2.2.6.1 ELECTROMAGNETIC COMPATIBILITY 3 − 21

3.2.2.6.2 ELECTROSTATIC DISCHARGE 3 − 21

3.2.2.6.3 CORONA 3 − 21

xiv

TABLE OF CONTENTS − CONTINUED

TABLES

TABLE PAGE

3.1.1.6−1 LINEAR TOLERANCES 3 − 2

3.2.1.1.6−1 FLUID CONNECTOR SPECIFICATION 3 − 4

3.2.1.2.1.1.1−1 OPTICAL PFM NTSC VIDEO SIGNAL RECEIVE POWER 3 − 5

3.2.1.2.2.1.1−1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL TRANSMIT POWER 3 − 5

3.2.1.3.1.1−1 ELECTRICAL INTERFACE PARAMETERS 3 − 10

3.2.1.3.1.2−1 ELECTRICAL INTERFACE FAULT CURRENT PARAMETERS 3 − 11

3.2.1.4.1−1 SUPPLY AMMONIA CHARACTERISTICS 3 − 12

3.2.1.4.2−1 RETURN AMMONIA CHARACTERISTICS 3 − 12

3.2.1.5.1−1 CREW INDUCED CONNECTOR LOADS 3 − 13

3.2.2.2.1.1.1−1 OPTICAL PFM NTSC VIDEO SIGNAL TRANSMIT POWER 3 − 16

3.2.2.2.2.1.1−1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL RECEIVE POWER 3 − 16

FIGURES

FIGURE PAGE

3.1.1−1 ITS S0 TO NODE 2 FUNCTIONAL INTERFACE DIAGRAM 3 − 1

3.2.1.3−1 ITS S0 TO NODE 2 ELECTRICAL INTERFACES 3 − 9

APPENDICIES

APPRENDIX PAGE

A ABBREVIATIONS AND ACRONYMS A - 1

B ISSUES B - 1

1 - 1

1.0 INTRODUCTION

1.1 PURPOSE

The purpose of this document is to provide definition of physical and functional interface requirements between ITS S0 and Node 2.

1.2 SCOPE

The scope of this document is limited to the interfaces between ITS S0 and Node 2.

1.3 PRECEDENCE

In the event of conflict between SSP 41162, United States On−Orbit Segment (USOS) Specification, and the contents of this ICD, the requirements of the USOS specification shall take precedence. In the event of conflict between the contents of this ICD and any related Prime Item Development Specification (PIDS), the contents of this ICD take precedence.

1.4 DELEGATION OF AUTHORITY

This document is prepared and maintained in accordance with SSP 30459, International Space Station Interface Control Plan.

2 - 1

2.0 DOCUMENTS

2.1 APPLICABLE DOCUMENTS

The following documents form a part of this document to the extent specified herein. In the event of conflict between documents referenced here and the contents of section 3, the order of precedence shall be as stated in paragraph 1.2 of this document.

DOCUMENT NO. TITLE

SSP 30219 Space Station Reference Coordinate Systems Rev E 4 Sept 98 Reference 3.1.1.4

SSP 30233 Space Station Requirements for Materials and Processes Rev E 27 Jan 1995 Reference 3.2.1.5.4, 3.2.2.5.4

SSP 30240 Space Station Grounding Requirements Revision C, DCNs 002, 003, 005, SSCN 3282

22 Dec 98 Reference 3.2.1.1.4, 3.2.2.1.4

SSP 30242 Space Station Cable/Wire Design and Control Requirements for Rev C, DCN 004, Electromagnetic Compatibility

SSCN 3282

3 Jun 1994 References 3.2.1.1.3, 3.2.1.1.5, 3.2.2.1.3, 3.2.2.1.5

SSP 30243 Space Station Requirements for Electromagnetic Compatibility Rev E,DCNs 003, 004, 005, 006, 007, 4 June 98 References 3.2.1.6.1, 3.2.1.6.2, 3.2.1.6.3, 3.2.2.6.1, 3.2.2.6.2, 3.2.2.6.3

SSP 30245 Space Station Electrical Bonding Requirements Rev D, DCNs 004, 005, 006, 007, 008, 009, 010, 011, 013, SSCN 2345

4 June 98 References 3.2.1.5.2, 3.2.2.5.2

2 - 2

SSP 30426 Space Station External Contamination Control Requirements Rev D, 001 21 Jan 1994 References 3.2.1.5.4, 3.2.2.5.4

SSP 30459 Space Station Interface Control Plan.

Rev. F March 23, 1994 Reference 1.4

SSP 30558 Fracture Control Requirements for Space Station Rev B 30 Jun 94 References 3.2.1.5.3, 3.2.2.5.3

SSP 50002 International Space Station Video Standard Rev A, DCN 002 20 Oct 2000 References 3.2.1.2.1.1, 3.2.1.2.2.1, 3.2.2.2.1.1, 3.2.2.2.2.1

SSP 50005 International Space Station Flight Crew Integration Rev B, DCN 008 Standard (NASA−STD−3000/T) 10 Aug 1994 References 3.2.1.1.1, 3.2.2.1.1

SSQ 21635 Connectors and Accessories, Electrical, Circular, IVA/EVA/Robot Rev K Compatible, Space Station Quality, General 29 Oct 02 References 3.2.1.1.2, 3.2.2.1.2

SSQ 21652 Wire, Electric, Silicone Insulated, Nickel Coated Copper, Rev F Space Quality, General Specification 15 Jan 00 References 3.2.1.1.3.3, 3.2.2.1.3.3

SSQ 21654 Cable, Single Fiber, Multi−Mode, Space Quality, General Rev C Specification 03 May 99 References 3.2.1.1.3.1. 3.2.2.1.3.1

SSQ 21656 General Specification for Wire and Cable, Electrical, Rev D Fluoropolymer Insulated Nickel Coated Copper or Copper Alloy 15 Jan 00 References 3.2.1.1.3.2, 3.2.1.1.3.3, 3.2.2.1.3.2, 3.2.2.1.3.3

1F45540 Coupling, Quick Disconnect, Male, Type 1, Ammonia, External Reference 3.2.1.1.6, 3.2.2.1.6

1F45541 Coupling, Quick Disconnect, Female, Type 1, Ammonia, External Reference 3.2.1.1.6, 3.2.2.1.6

2 - 3

2.2 REFERENCE DOCUMENTS

The following documents are referenced in this ICD for context and user convenience.

DOCUMENT NO. TITLE

SSP 41162 United States On−Orbit Segment Specification Reference 1.3

SSP 30263:002 Remote Power Control Module (RPCM) Standard Interface Control Document

Reference Table 3.2.1.3.1.1−1

SSP 30258:001 Space Station Program External Active Thermal Control Heat Exchanger to Pressurized Elements Interface Control Document

Reference Paragraph 3.2.2.4.3

3 − 1

3.0 INTERFACES

3.1 GENERAL

3.1.1 INTERFACE DESCRIPTION

The ITS S0 to Node 2 functional interface is shown in Figure 3.1.1−1.

PRIMARY AND SECONDARY POWER

AMMONIA

VIDEO

VIDEO SYNCHRONIZATION

AND CONTROL

HEAT EXCHANGER MONITOR

AND CONTROL

FIGURE 3.1.1−1 ITS S0 TO NODE 2 FUNCTIONAL INTERFACE DIAGRAM

3.1.1.1 ITS S0 DESCRIPTION

ITS S0 is the center truss segment of the Space Station, providing attachment of the truss to the Module pattern by means of the Module to Truss Structure (MTS).

3.1.1.2 NODE DESCRIPTION

Node 2 is an element serving primarily as a berthing location for other pressurized elements.

Node 2 contains equipment for primary−to−secondary power conversion and plumbing and cable runs to other elements. Node 2 is located forward of the United States Laboratory (US Lab) between the Columbus Attached Pressurized Module (APM) and the Japanese Experi-ment Module (JEM).

3.1.1.3 INTERFACE PLANE DESCRIPTION

The interface between ITS S0 and Node 2 is at the utility connector halves from ITS S0 to the utility connector halves from Node 2.

3.1.1.4 COORDINATE SYSTEMS

The ITS S0 coordinate system and the Node 2 coordinate system are as shown in SSP 30219, Space Station Reference Coordinate System.

3 − 2

3.1.1.5 ENGINEERING UNITS

Unless otherwise noted herein, all dimensions are in the English system of inch pound (IP) units.

3.1.1.6 TOLERANCE

Linear tolerance on English dimensions are as indicated in Table 3.1.1.6−1, unless otherwise stated. Angular tolerances are +/− 0.5 deg on all angles, unless otherwise stated.

TABLE 3.1.1.6−1 LINEAR TOLERANCES

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁEnglish Dimension

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁImplied Tolerances (Inches)ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

X.XX

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

+/− 0.030

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

X.XXX ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

+/− 0.010

3.1.1.7 ITS S0 INTERFACE FUNCTIONS

ITS S0 provides the following functions at the interface to Node 2:

a. Utility Connections

b. Supply Primary Power

c. Supply Power and Data Grapple Fixutre (PDGF) Secondary Power

d. Video Synchronization and Control

e. Supply Heat Exchanger Instrumentation Signals

f. Receive Heat Exchanger Instrumentation Signals

g. Supply and Receive Ammonia Coolant

3.1.1.8 NODE 2 INTERFACE FUNCTIONS

Node 2 provides the following functions at the interface to the ITS S0:

a. Utility Connections

b. Receive Primary Power

c. Receive PDGF Secondary Power

d. Video

e. Supply Heat Exchanger Instrumentation Signals

f. Receive Heat Exchanger Instrumentation Signals

g. Receive and Return Ammonia Coolant

3.1.2 INTERFACE RESPONSIBILITIES

3.1.2.1 RESPONSIBILITY FOR ITS S0

McDonnell Douglas Aerospace (MDA), Inboard Truss Segment Integrated Product Team (IPT), provides ITS S0.

3 − 3

3.1.2.2 RESPONSIBILITY FOR NODE 2

Agenzia Spaziale Italiana (ASI) provides Node 2.

3.1.2.3 RESPONSIBILITY FOR UTILITY CONNECTORS

National Aeronautical Space Administration (NASA) is responsible for the utility connectors at the ITS S0/Node 2 interface.

3.2 INTERFACE REQUIREMENTS

3.2.1 ITS S0 INTERFACE REQUIREMENTS

3.2.1.1 INTERCONNECTING UTILITY HARDWARE

ITS S0 shall incorporate provisions for the mechanical connection of ammonia coolant, power, instrumentation, and video utilities to Node 2 during on−orbit assembly. Utility interfaces shall contain physical provisions to preclude incorrect installation of utility lines and shall not be lockwired or staked.

3.2.1.1.1 ACCESSIBILITY

Fluid and avionic connectors shall comply with SSP 50005, International Space Station Flight Crew Standard, paragraphs 14.3, 14.4, and 14.6.4.3 requirements for accessibility by Extra−Ve-hicular Activity (EVA) suited crew members.

3.2.1.1.2 ELECTRICAL CONNECTORS

The characteristics for electrical connectors shall be in accordance with SSQ 21635, General Specifications for Connectors and Accessories, Electrical, Circular, Miniature, IVA/EVA/Robot Compatible, Space Quality.

3.2.1.1.3 UTILITY CABLE SPECIFICATIONS

Cable and wire design shall be in accordance with SSP 30242, Space Station Cable/Wire De-sign and Control Requirements for Electromagnetic Compatibility.

3.2.1.1.3.1 VIDEO CABLE SPECIFICATIONS

The video interconnect cables shall comply with the requirements of SSQ 21654, General Specification for Cable, Single Fiber, Multi−Mode, Space Quality.

3.2.1.1.3.2 HEAT EXCHANGER INSTRUMENTATION CABLES

Heat exchanger instrumentation utility cables shall conform to SSQ 21656, General Specifica-tion for Wire and Cable, Electrical, Fluoropolymer Insulated Nickel Coated Copper or Copper Alloy.

3 − 4

3.2.1.1.3.3 ELECTRICAL POWER CABLE SPECIFICATIONS

Power cables shall conform to SSQ 21652, General Specification For Wire, Electric, Silicone Insulated, Nickel Coated Copper, Space Quality or to SSQ 21656, General Specification for Wire and Cable, Electric, Fluoropolymer−insulated, Nickel Coated Copper or Copper Alloy.

3.2.1.1.4 GROUNDING

Grounding between ITS S0 and Node 2 shall be in accordance with SSP 30240, Space Station Grounding Requirements.

3.2.1.1.5 SHIELD TERMINATION OF ELECTRICAL CABLES

All shields shall be terminated to structure or chassis at ITS S0. Shield termination shall be in accordance with SSP 30242.

3.2.1.1.6 FLUID CONNECTORS

Fluid connectors at the interface shall comply with specifications shown in Table 3.2.1.1.6−1, Fluid Connector Specification.

TABLE 3.2.1.1.6−1 FLUID CONNECTOR SPECIFICATIONÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

APPLICATION

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

SPECIFICATION

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

REMARKS

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

Quick Disconnect, EVA Compatible, Ammonia, External

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

1F45540/1F45541 ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

3.2.1.1.7 REDUNDANT UTILITY INTERFACES

ITS S0 shall provide redundant utility interfaces for power distribution and heat exchanger in-strumentation. Alternate or redundant functional paths shall be separated or protected at the interface such that a credible event, which causes the loss of one functional path, will not result in the loss of the alternate or redundant functional path(s).

3.2.1.2 ELECTRONIC INTERFACES

3.2.1.2.1 VIDEO SIGNALS

The ITS S0 shall receive the National Television Standards committee (NTSC) video signals described in the following subparagraphs from Node 2.

3.2.1.2.1.1 OPTICAL PULSE FREQUENCY MODULATION (PFM) NATIONAL TELEVISION

STANDARDS COMMITTEE (NTSC) VIDEO SIGNAL CHARACTERISTICS

The optical PFM NTSC video signal characteristics shall be in accordance with SSP 50002, paragraphs 3.2.1.5.4. and 3.2.1.5.5.

3.2.1.2.1.1.1 OPTICAL PFM NTSC VIDEO SIGNAL RECEIVE POWER LEVELS

The ITS S0 shall meet all transmission quality requirements with minimum average optical PFM NTSC video signal input power, at ambient temperature, provided by Table 3.2.1.2.1.1.1−1 at each signal interface.

3 − 5

TABLE 3.2.1.2.1.1.1−1 OPTICAL PFM NTSC VIDEO SIGNAL RECEIVE POWER

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Source to Destination ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

ITS S0 Input

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

Video Source

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

Destination

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

Optical Power (dBm)

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

Ext Port 11 ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

VSW 1 ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

−20.4

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁPDGF Node 2 −1

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁVSW 1

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ−20.1ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

PDGF Node 2 −2

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

VSW 2

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

−20.1

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

PDGF Node 2 −3 ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

VSW 3 ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

−20.1

3.2.1.2.1.2 DELETED

3.2.1.2.1.3 DELETED

3.2.1.2.1.4 DELETED

3.2.1.2.2 SYNC AND CONTROL SIGNALS

ITS S0 shall transmit the signals described in the following subparagraphs to Node 2.

3.2.1.2.2.1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL CHARACTERISTICS

The optical PFM NTSC sync and control signal characteristics shall be in accordance with SSP 50002, paragraphs 3.2.1.5.4. and 3.2.1.5.5.

3.2.1.2.2.1.1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL TRANSMIT POWER

LEVELS

The minimum average optical PFM NTSC sync and control signal transmit power, measured at ambient temperature, transmitted by ITS S0 shall meet Table 3.2.1.2.2.1.1−1 at each signal interface.

TABLE 3.2.1.2.2.1.1−1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL TRANSMIT

POWER

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Source to Destination ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

ITS S0 Output

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁVideo Source

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁDestination

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁOptical Power (dBm)ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

VSW 1

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

Ext Port 11

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

−18.7

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

VSW 2 ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

PDGF NODE 2 −1 ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

−19.0

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁVSW 3

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁPDGF NODE 2 −2

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ−19.0

3 − 6

3.2.1.2.2.2 DELETED

3.2.1.2.2.3 DELETED

3.2.1.2.2.4 DELETED

3.2.1.2.3 INSTRUMENTATION AND CONTROLS

3.2.1.2.3.1 HEAT EXCHANGER ORBITAL REPLACEABLE UNITS

The ITS S0 to Node 2 interface shall provide for the instrumentation and control of six (6) Heat Exchanger (Hx) Orbital Replacement Units (ORUs) as defined in the following paragraphs.

3.2.1.2.3.1.1 HX ORU CONTROL SIGNALS

All Hx ORU Control Signals are conditioned secondary power. The maximum voltage level associated with these signals shall be 126 Volts Direct Current (DC). Short circuit current protection shall be provided by ITS S0 for each control signal. The short circuit current for each control signal shall not exceed 3.0 Amps DC.

Loop A Hx ORU’s and Loop B Hx ORU’s are redundant utility interfaces. Routing and sepa-ration of associated wiring shall meet the requirements of paragraph 3.2.1.1.7.

3.2.1.2.3.1.1.1 NODE 2 Hx ORUs

ITS S0 shall provide four signals to Node 2 to command valves that control Node 2 Loop A Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

ITS S0 shall provide four signals to Node 2 to command valves that control Node 2 Loop B Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

3.2.1.2.3.1.1.2 JEM Hx ORUs

ITS S0 shall provide four signals to Node 2 to command valves that control JEM Loop A Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

ITS S0 shall provide four signals to Node 2 to command valves that control JEM Loop B Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

3 − 7

3.2.1.2.3.1.1.3 APM Hx ORUs

ITS S0 shall provide four signals to Node 2 to command valves that control APM Loop A Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

ITS S0 shall provide four signals to Node 2 to command valves that control APM Loop B Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

3.2.1.2.3.1.2 Hx ORU INSTRUMENTATION/SENSOR SIGNALS

3.2.1.2.3.1.2.1 Hx ORU VALVE POSITION SENSORS

ITS S0 shall provide to Node 2 the excitation voltages required for monitoring each Hx ORU limit switch as described below. The maximum excitation voltage provided by ITS S0 when switch contacts are OPEN shall be 29 Volts DC. ITS S0 shall limit the current to closed switch contacts to 0.2 milliamps (mA) maximum.

Loop A Hx ORU and Loop B Hx ORU are redundant utility interfaces. Routing and separation of associated wiring shall meet the requirements of paragraph 3.2.1.1.7.

3.2.1.2.3.1.2.1.1 NODE 2 Hx ORUs

ITS S0 shall receive four signals from Node 2 for monitoring Node 2 Loop A Hx ORU valve status. Closed contacts on limit switches located in the Node 2 Loop A Hx ORU indicate (1) the Bypass Valve is in full NORMAL Position, (2) the Bypass Valve is in full BYPASS posi-tion, (3) the Isolation/Relief Valve is in fully OPEN position, and (4) the Isolation/Relief Valve is in fully CLOSED position.

ITS S0 shall receive four signals from Node 2 for monitoring Node 2 Loop B Hx ORU valve status. Closed contacts on limit switches located in the Node 2 Loop B Hx ORU indicate (1) the Bypass Valve is in full NORMAL Position, (2) the Bypass Valve is in full BYPASS posi-tion, (3) the Isolation/Relief Valve is in fully OPEN position, and (4) the Isolation/Relief Valve is in fully CLOSED position.

3.2.1.2.3.1.2.1.2 JEM Hx ORUs

ITS S0 shall receive four signals from Node 2 for monitoring JEM Loop A Hx ORU valve sta-tus. Closed contacts on limit switches located in the JEM Loop A Hx ORU indicate (1) the By-pass Valve is in full NORMAL Position, (2) the Bypass Valve is in full BYPASS position, (3) the Isolation/Relief Valve is in fully OPEN position, and (4) the Isolation/Relief Valve is in ful-ly CLOSED position.

ITS S0 shall receive four signals from Node 2 for monitoring JEM Loop B Hx ORU valve sta-tus. Closed contacts on limit switches located in the JEM Loop B Hx ORU indicate (1) the By-pass Valve is in full NORMAL Position, (2) the Bypass Valve is in full BYPASS position, (3) the Isolation/Relief Valve is in fully OPEN position, and (4) the Isolation/Relief Valve is in ful-ly CLOSED position.

3 − 8

3.2.1.2.3.1.2.1.3 APM Hx ORUs

ITS S0 shall receive four signals from Node 2 for monitoring APM Loop A Hx ORU valve sta-tus. Closed contacts on limit switches located in the APM Loop A Hx ORU indicate (1) the By-pass Valve is in full NORMAL Position, (2) the Bypass Valve is in full BYPASS position, (3) the Isolation/Relief Valve is in fully OPEN position, and (4) the Isolation/Relief Valve is in ful-ly CLOSED position.

ITS S0 shall receive four signals from Node 2 for monitoring APM Loop B Hx ORU valve sta-tus. Closed contacts on limit switches located in the APM Loop B Hx ORU indicate (1) the Bypass Valve is in full NORMAL Position, (2) the Bypass Valve is in full BYPASS position,

(3) the Isolation/Relief Valve is in fully OPEN position, and (4) the Isolation/Relief Valve is in fully CLOSED position.

3.2.1.2.3.1.2.2 HX ORU TEMPERATURE SENSORS

ITS S0 shall provide excitation for the six temperature measurements below. Each measure-ment is defined as low level analog 1.0 mA current loop configured for a standard resistance temperature device (RTD) sensor.

Sensors for Loop A Hx ORU and Loop B Hx ORU as defined below are redundant utility inter-faces. Routing and separation of wiring shall meet the requirements of 3.2.1.1.7.

3.2.1.2.3.1.2.2.1 NODE 2 HX ORUs

ITS S0 shall receive one signal from Node 2 for monitoring Node 2 Loop A Hx ORU ammo-nia outlet temperature.

ITS S0 shall receive one signal from Node 2 for monitoring Node 2 Loop B Hx ORU ammonia outlet temperature.

3.2.1.2.3.1.2.2.2 JEM HX ORUs

ITS S0 shall receive one signal from Node 2 for monitoring JEM Loop A Hx ORU ammonia outlet temperature.

ITS S0 shall receive one signal from Node 2 for monitoring JEM Loop B Hx ORU ammonia outlet temperature.

3 − 9

3.2.1.2.3.1.2.2.3 APM HX ORUs

ITS S0 shall receive one signal from Node 2 for monitoring APM Loop A Hx ORU ammonia outlet temperature.

ITS S0 shall receive one signal from Node 2 for monitoring APM Loop B Hx ORU ammonia outlet temperature.

3.2.1.3 ELECTRICAL INTERFACES

The ITS S0 to Node 2 electrical interfaces are shown in Figure 3.2.1.3−1.

APM 1B

APM 2A

APM 3A

APM 4B

JEM 1B

JEM 2B

JEM 3A

JEM 4A

CENT 1A

CENT 3B

PDGFSSRMS1NODE2

PDGFSSRMS2NODE2

PDGFPL1NODE2

PDGFPL2NODE2

FIGURE 3.2.1.3−1 ITS S0 TO NODE 2 ELECTRICAL INTERFACES

3 − 10

3.2.1.3.1 SUPPLY POWER

ITS S0 shall supply power to the Node 2 through the APM1B, APM2A, APM3A, APM4B, JEM1B, JEM2B, JEM3A, JEM4A, CENT1A, CENT3B, PDGFSSRMS1NODE2, PDGFSSRMS2NODE2, PDGFPL1NODE2 and PDGFPL2NODE2, power output circuits.

3.2.1.3.1.1 POWER QUALITY

The steady state voltage over the interface operating current range shall be within the envelope shown in Table 3.2.1.3.1.1−1.

TABLE 3.2.1.3.1.1−1 ELECTRICAL INTERFACE PARAMETERS

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

Circuit Name

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

Interface Vrange

(volts)

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

Operating Current (amps)

ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

Overcurrent Protection

ÁÁÁÁÁ

ÁÁÁÁÁ

ÁÁÁÁÁ

ÁÁÁÁÁ

ÁÁÁÁÁ

Min Steady

State Wire Rating

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

APM1B ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

118.4 to 173ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 65 ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

See Table 3.2.1.3.1.2−1ÁÁÁÁÁ

ÁÁÁÁÁ

78A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

APM2A ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

118.5 to 173ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 65 ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

See Table 3.2.1.3.1.2−1ÁÁÁÁÁ

ÁÁÁÁÁ

78A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

APM3A ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

119 to 173 ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 65 ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

See Table 3.2.1.3.1.2−1ÁÁÁÁÁ

ÁÁÁÁÁ

78A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

APM4B ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

118.5 to 173ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 65 ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

See Table 3.2.1.3.1.2−1ÁÁÁÁÁ

ÁÁÁÁÁ

78A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

JEM1B ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

118.4 to 173ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 65 ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

See Table 3.2.1.3.1.2−1ÁÁÁÁÁ

ÁÁÁÁÁ

78A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

JEM2B ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

117.5 to 173ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 65 ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

See Table 3.2.1.3.1.2−1ÁÁÁÁÁ

ÁÁÁÁÁ

78A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

JEM3A ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

119 to 173 ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 65 ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

See Table 3.2.1.3.1.2−1ÁÁÁÁÁ

ÁÁÁÁÁ

78A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

JEM4A ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

118.5 to 173ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 65 ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

See Table 3.2.1.3.1.2−1ÁÁÁÁÁ

ÁÁÁÁÁ

78A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

CENT1A

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

118.9 to 173

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 65

ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

See Table 3.2.1.3.1.2−1

ÁÁÁÁÁ

ÁÁÁÁÁ

78A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁCENT3B

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ119 to 173

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ0 to 65

ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁSee Table 3.2.1.3.1.2−1

ÁÁÁÁÁ

ÁÁÁÁÁ78AÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁPDGFSSRMS1NODE2

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ118 to 126

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ0 to 17.7

ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ1

ÁÁÁÁÁ

ÁÁÁÁÁ30AÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

PDGFSSRMS2NODE2

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

118 to 126

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 17.7

ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁ

ÁÁÁÁÁ

ÁÁÁÁÁ

30A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

PDGFPL1NODE2 ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

118 to 126 ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 17.7 ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

1 ÁÁÁÁÁ

ÁÁÁÁÁ

30A

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

PDGFPL2NODE2 ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

118 to 126 ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

0 to 17.7 ÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁ

1 ÁÁÁÁÁ

ÁÁÁÁÁ

30A 1 Protection is equivalent with SSP 30263:002, Type II Remote Power Control Module (RPCM) Standard ICD.

3.2.1.3.1.2 FAULT PROTECTION

ITS S0 shall provide protection as shown in Table 3.2.1.3.1.2−1.

3 − 11

TABLE 3.2.1.3.1.2−1 ELECTRICAL INTERFACE FAULT CURRENT PARAMETERS

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

Circuit Names

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Source Limited Maximum Fault Current

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

Trip Current Threshold

Range (amps)

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

Trip Time/Max.

Fault Duration

(msec)

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

APM1B

APM2A

APM3A

APM4B

JEM1B

JEM2B

JEM3A

JEM4A

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

No more than 4,000 amps peak surge to be limited to no more than 350 amps within 80 msec of fault onset

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

78.25 to 85.75

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁ

108 to 130

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

ÁÁÁÁÁÁ

CENT1A

CENT3B

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3.2.1.3.1.3 DELETED

3.2.1.3.1.4 DELETED

3.2.1.4 FLUID INTERFACES

3.2.1.4.1 SUPPLY COOLANT

ITS S0 shall supply ammonia coolant to Node 2 for active heat acquisition and transport. Char-acteristics of the coolant shall be within the ranges shown in Table 3.2.1.4.1−1, Supply Ammo-nia Characteristics.

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TABLE 3.2.1.4.1−1 SUPPLY AMMONIA CHARACTERISTICS

Loop Pressure Range(psia)

Operating Temperature Range * (°F)

Mass Flow Rate Range (lbm/hr)

Minimum Operating Mass

Flowrate (Lbm/Hr)***

A 0 − 500 34 − 40 0 − 4200 2830

B 0 − 500 34 − 40 0 − 5400 4100

* Non−operating temperature range is −100 degrees Fahrenheit to 120 degrees Fahrenheit no− flow conditions ** For Reference Only *** In the event of the loss of one ammonia loop, the other loop flow rate remains the same.

3.2.1.4.2 RECEIVE COOLANT

ITS S0 shall receive return ammonia coolant from Node 2 for heat transport. Characteristics of the coolant shall be within the ranges shown in Table 3.2.1.4.2−1, Return Ammonia Character-istics.

TABLE 3.2.1.4.2−1 RETURN AMMONIA CHARACTERISTICS

Loop Pressure Range (psia)

Operating Temperature Range *

(5F)

Mass Flowrate (Range) (lbm/hr)

Minimum Operating Mass

Flow Rate (lbm/hr)***

A 0 − 500 34 − 95 0 − 4200 2830

B 0 − 500 34 − 95 0 − 5400 4100

* Non−operating temperature range is −100 degrees Fahrenheit to 120 degrees Fahrenheit no− flow conditions ** For Reference Only.

*** In the event of the loss of one ammonia loop, the other loop flow rate remains the same.

3.2.1.4.3 DELTA PRESSURE

ITS S0 shall accommodate a pressure drop of 9.5 +/− 0.4 pounds per square inch differential (psid) at the flow rate of 2,830 lbm/hr across the Node 2 Loop A ammonia lines at the ITS S0 to Node 2 supply/return interface.

ITS S0 shall accommodate a pressure drop of 8.6 +/− 0.4 psid at the flow rate of 4,100 lbm/hr across the Node 2 Loop B ammonia lines at the ITS S0 to Node 2 supply/return interface.

3.2.1.4.4 VOLUME ALLOCATION

ITS S0 shall accomodate a minimum of 1.25 ft3 for loop A and 0.85 ft3 for loop B of ammonia coolant from Node 2.

3.2.1.5 STRUCTURAL INTERFACE

There are no structural considerations at this interface.

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3.2.1.5.1 CREW INDUCED LOADS

The connector interfaces between the ITS S0 and Node 2 shall be designed to withstand the crew induced loads listed in Table 3.2.1.5.1−1.

3.2.1.5.1.1 DELETED

TABLE 3.2.1.5.1−1 CREW INDUCED CONNECTOR LOADS

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DESCRIPTION

OF LOAD

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LIMIT LOAD

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TYPE OF

LOAD

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DIRECTION

OF LOAD

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COMMENTS

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Inadvertent kick/ bump

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125 lbf

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Quasi−static concentrated load over 0.5 inch diameter circular area

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Any direction

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Accidental impact applied to hardware near (within 24 in. ) of translation paths or work sites

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EVA handling load

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45 lbf (35 in−lbf for connector panels for mate/ demate of con-nector

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Quasi−static concentrated load over 1.25 inch radius cir-cular area

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Any directionÁÁÁÁÁÁÁÁ

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This load can be ap-plied anytime to any hardware by the EVA crew member when in a foot re-straint. All hard-ware must be de-signed to this load as a minimum. This force would be ap-plied by the palm of the glove, tip of a boot or knee.

3.2.1.5.2 BONDING

The interfaces shall meet or exceed requirements for a Class R bond in accordance with SSP 30245, Space Station Electrical Bonding Requirements. The on−orbit bonding shall meet the requirements for a Class R Bond, which includes the Class H parameters, when permanently mated. During all other operations, the bond shall meet the requirements of a Class H Bond.

3.2.1.5.3 DELETED

3.2.1.5.4 MATERIALS AND FINISHES

Materials and finishes at the hardware interface shall be compatible with the environment and with interfacing hardware per the requirements of paragraph 4.5.4 of SSP 30233, Space Station Requirements for Materials and Processes. Materials located near sensitive hardware such as radiators and window cavities shall have lower outgassing rates per the requirements of para-graph 3.2.2.3 of SSP 30426, Space Station External Contamination Control Requirements.

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3.2.1.5.5 DELETED

3.2.1.6 ENVIRONMENTS

3.2.1.6.1 ELECTROMAGNETIC COMPATIBILITY

The ITS S0 to Node 2 interface shall meet the requirements of SSP 30243, Space Station Sys-tems Requirements for Electromagnetic Compatibility.

3.2.1.6.2 ELECTROSTATIC DISCHARGE

The ITS S0 to Node 2 interface shall meet the requirements of SSP 30243.

3.2.1.6.3 CORONA

The ITS S0 to Node 2 interface shall meet the requirements of SSP 30243.

3.2.2 NODE 2 INTERFACE REQUIREMENTS

3.2.2.1 INTERCONNECTING UTILITY HARDWARE

Node 2 shall incorporate provisions for the mechanical connection of ammonia coolant, power, instrumentation, and video utilities to ITS S0 during on−orbit assembly. Utility interfaces shall contain physical provisions to preclude incorrect installation of utility lines and shall not be lockwired or staked.

3.2.2.1.1 ACCESSIBILITY

Fluid and avionic connectors shall comply with SSP 50005, paragraphs 14.3, 14.4, and 14.6.4.3, requirements for accessibility by EVA−suited crew members.

3.2.2.1.2 ELECTRICAL CONNECTORS

The characteristics for electrical connectors shall be in accordance with SSQ 21635, General Specifications for Connectors and Accessories, Electrical, Circular, Miniature, IVA/EVA/Robot Compatible, Space Quality.

3.2.2.1.3 UTILITY CABLE SPECIFICATIONS

Cable and wire design shall be in accordance with SSP 30242, Space Station Cable/Wire De-sign and Control Requirements for Electromagnetic Compatibility.

3.2.2.1.3.1 VIDEO CABLE SPECIFICATIONS

The video interconnect cables shall comply with the requirements of SSQ 21654, General Specification for Cable, Single Fiber, Multi−Mode, Space Quality.

3 − 15

3.2.2.1.3.2 HEAT EXCHANGER INSTRUMENTATION CABLES

Heat exchanger instrumentation utility cables shall conform to SSQ 21656.

3.2.2.1.3.3 ELECTRICAL POWER CABLE SPECIFICATIONS

Power cables shall conform to SSQ 21652 or SSQ 21656.

3.2.2.1.4 GROUNDING

Grounding between Node 2 and ITS S0 shall be in accordance with SSP 30240.

3.2.2.1.5 SHIELD TERMINATION OF ELECTRICAL CABLES

All shields shall be terminated to structure or chassis at Node 2. Shield termination shall be in accordance with SSP 30242.

3.2.2.1.6 FLUID CONNECTORS

Fluid connectors at the interface shall comply with specifications shown in Table 3.2.1.1.6−1.

3.2.2.1.7 REDUNDANT UTILITY INTERFACES

Node 2 shall provide redundant utility interfaces for power distribution and heat exchanger in-strumentation. Alternate or redundant functional paths shall be separated or protected at the interface such that a credible event, which causes the loss of one functional path, will not result in the loss of the alternate or redundant functional path(s).

3.2.2.2 ELECTRONIC INTERFACES

3.2.2.2.1 VIDEO SIGNALS

Node 2 shall transmit the signals described in the following subparagraphs to the ITS S0.

3.2.2.2.1.1 OPTICAL PFM NTSC VIDEO SIGNAL CHARACTERISTICS

The optical PFM NTSC video signal characteristics shall be in accordance with SSP 50002, paragraphs 3.2.1.5.4 and 3.2.1.5.5.

3.2.2.2.1.1.1 OPTICAL PFM NTSC VIDEO SIGNAL TRANSMIT POWER LEVELS

The minimum average optical PFM NTSC video signal transmit power, measured at ambient temperature, transmitted by Node 2 shall meet Table 3.2.2.2.1.1.1−1 at each signal interface.

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TABLE 3.2.2.2.1.1.1−1 OPTICAL PFM NTSC VIDEO SIGNAL TRANSMIT POWER

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Source to Destination ÁÁÁÁÁÁÁÁÁÁ

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Node 2 Output*

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ÁÁÁÁÁÁÁÁÁÁÁÁVideo Source

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ÁÁÁÁÁÁÁÁÁÁÁDestination

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ÁÁÁÁÁÁÁÁÁÁOptical Power (dBm)ÁÁÁÁÁÁÁÁÁÁÁÁ

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Ext Port 11

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VSW 1

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ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

−18.8

ÁÁÁÁÁÁÁÁÁÁÁÁ

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PDGF NODE 2 −1 ÁÁÁÁÁÁÁÁÁÁÁ

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VSW 1 ÁÁÁÁÁÁÁÁÁÁ

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−18.4

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ÁÁÁÁÁÁÁÁÁÁÁÁPDGF NODE 2 −2

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ÁÁÁÁÁÁÁÁÁÁÁVSW 2

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ÁÁÁÁÁÁÁÁÁÁ−18.4ÁÁÁÁÁÁÁÁÁÁÁÁ

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ÁÁÁÁÁÁÁÁÁÁÁÁ

PDGF NODE 2 −3

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ÁÁÁÁÁÁÁÁÁÁÁ

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VSW 3

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−18.4

* Measured at the Node 2 aft−end ring connector panel.

3.2.2.2.1.2 DELETED

3.2.2.2.1.3 DELETED

3.2.2.2.1.4 DELETED

3.2.2.2.2 SYNC AND CONTROL SIGNALS

Node 2 shall receive the signals described in the following subparagraphs from ITS S0.

3.2.2.2.2.1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL CHARACTERISTICS

The optical PFM NTSC sync and control signal characteristics shall be in accordance with SSP 50002, paragraphs 3.2.1.5.4 and 3.2.1.5.5.

3.2.2.2.2.1.1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL RECEIVE POWER

LEVELS

Node 2 shall meet all power level requirements with minimum average optical PFM NTSC sync and control signal input power, measured at ambient temperature, provided by Table 3.2.2.2.2.1.1−1 at each signal interface.

TABLE 3.2.2.2.2.1.1−1 OPTICAL PFM NTSC SYNC AND CONTROL SIGNAL RECEIVE

POWER

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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Source to Destination ÁÁÁÁÁÁÁÁÁÁ

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Node 2 Input *

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ÁÁÁÁÁÁÁÁÁÁÁÁ

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Video Source

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁ

Destination

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

Optical Power (dBm)

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ÁÁÁÁÁÁÁÁÁÁÁÁ

VSW 1 ÁÁÁÁÁÁÁÁÁÁÁ

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Ext Port 11 ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

−17.9

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁ

VSW 2 ÁÁÁÁÁÁÁÁÁÁÁ

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PDGF Node 2 −1 ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ

−20.7

ÁÁÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁVSW 3

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ÁÁÁÁÁÁÁÁÁÁÁPDGF Node 2 −2

ÁÁÁÁÁÁÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁ−20.7

* Measured at the Node 2 aft−end ring connector panel.

3 − 17

3.2.2.2.2.2 DELETED

3.2.2.2.2.3 DELETED

3.2.2.2.2.4 DELETED

3.2.2.2.3 INSTRUMENTATION AND CONTROLS

3.2.2.2.3.1 HEAT EXCHANGER ORBITAL REPLACEABLE UNIT

The Node 2 to ITS S0 interface shall provide for the instrumentation and control of six (6) Hx ORUs, which are defined as follows:

3.2.2.2.3.1.1 Hx ORU CONTROL SIGNALS

All Hx ORU Control Signals are conditioned secondary power. The maximum voltage level associated with each of these signals shall be 126 Volts DC. Short circuit current protection shall be provided by ITS S0 for each control signal. Short circuit current for each control sig-nal shall not exceed 3.0 Amps DC.

Loop A Hx ORUs and Loop B Hx ORUs are redundant utility interfaces. Routing and separa-tion of associated wiring shall meet the requirements of paragraph 3.2.2.1.7.

3.2.2.2.3.1.1.1 NODE 2 HxORUs

Node 2 shall receive four signals from ITS S0 to command valves that control Node 2 Loop A Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

Node 2 shall receive four signals from ITS S0 to command valves that control Node 2 Loop B Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

3.2.2.2.3.1.1.2 JEM Hx ORUs

Node 2 shall receive four signals from ITS S0 to command valves that control JEM Loop A Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

Node 2 shall receive four signals from ITS S0 to command valves that control JEM Loop B Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

3.2.2.2.3.1.1.3 APM Hx ORUs

Node 2 shall receive four signals from ITS S0 to command valves that control APM Loop A Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

Node 2 shall receive four signals from ITS S0 to command valves that control APM Loop B Hx ORU. These include (1) Command the Bypass Valve to NORMAL Flow, (2) Command the Bypass Valve to BYPASS Flow, (3) Command the Isolation/Relief Valve to OPEN, and (4) Command the Isolation/Relief Valve to CLOSE.

3 − 18

3.2.2.2.3.1.2 Hx ORU INSTRUMENTATION/SENSOR SIGNALS

3.2.2.2.3.1.2.1 Hx ORU VALVE POSITION SENSORS

Node 2 shall receive from ITS S0 excitation voltage required for monitoring each Hx ORU limit switch as described below. The maximum excitation voltage provided by ITS S0 when switch contacts are OPEN shall be 29 Volts DC . ITS S0 shall limit the current to closed switch contacts to 0.2 mA maximum.

Loop A Hx ORU and Loop B Hx ORU are redundant utility interfaces. Routing and separation of associated wiring shall meet the requirements of paragraph 3.2.2.1.7.

3.2.2.2.3.1.2.1.1 NODE 2 Hx ORUs

Node 2 shall provide four signals to ITS S0 for monitoring Node 2 Loop A Hx ORU valve sta-tus. Closed contacts on limit switches located in Node 2 Loop A Hx ORU indicate (1) the By-pass Valve is in full NORMAL Position, (2) the Bypass Valve is in full BYPASS position, (3) the Isolation/Relief Valve is in fully OPEN position, and (4) the Isolation/Relief Valve is in ful-ly CLOSED position.

Node 2 shall provide four signals to ITS S0 for monitoring Node 2 Loop B Hx ORU valve sta-tus. Closed contacts on limit switches located in Node 2 Loop B Hx ORU indicate (1) the By-pass Valve is in full NORMAL Position, (2) the Bypass Valve is in full BYPASS position, (3) the Isolation/Relief Valve is in fully OPEN position, and…

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