UNSPSC 32151708: Programmable logic controller input output housing

Housing to contain modular I/O units connected to PLC's.

UNSPSC 32151708 Programmable logic controller input output housing (Commodity) captures PLC replacement, SCADA system modernization, and control system integration work that state and local water utilities, municipalities, and special-purpose districts are actively procuring. Recent solicitations show municipalities and water districts replacing legacy PLC hardware—particularly Modicon and General Electric systems—with modern Schneider Electric (M580, Quantum) and Allen-Bradley (ControlLogix) platforms as part of broader SCADA upgrades at water treatment and wastewater facilities. The work spans hardware procurement, PLC programming, HMI screen development, Factory and Site Acceptance Testing, network and panel design, operator training, and comprehensive integration with existing supervisory control systems. Issuing bodies include municipal water districts (West Basin Municipal Water District in California), city water departments (City of Atlanta Department of Watershed Management, City of Santa Fe), wastewater treatment operators (Maryland Environmental Service), and municipal purchasing offices handling multi-facility control system replacements. Water utilities dominate the recent activity, though municipalities also procure control system components for energy facilities and discrete automation upgrades.

Recent opportunities concentrate in the South and West. West Basin Municipal Water District (Torrance, California) issued RFP requesting Modicon M580 processor replacements with remote I/O capability and Reverse Osmosis SCADA recommissioning, proposals due November 5, 2026. The City of Atlanta Department of Watershed Management posted dual pre-advertisement notices (May 8, 2026, responses due May 29, 2026) for SCADA upgrades at both Hemphill and Chattahoochee water treatment plants, each involving replacement of General Electric iFix systems with Schneider Electric AVEVA platforms, conversion from ControlNet to Ethernet/IP architecture, and new Allen-Bradley ControlLogix controllers across multiple facility systems—each representing a 360-day project with substantial integration scope. The City of Santa Fe on behalf of Buckman Direct Diversion posted RFP FY26-RFP-036 (responses due January 9, 2026) for PLC replacement and SCADA modification across four critical systems using Schneider Electric Unity Pro XL software, with work scheduled October through March to minimize operational disruption and local-preference scoring up to 6% for Santa Fe-certified businesses. Maryland Environmental Service (Dorsey Run Wastewater Treatment Plant) solicited sealed bids for PLC replacement and lime system upgrades with a 20% MBE participation requirement, bids due November 6, 2026. The City of Austin also posted multiple quotation requests (IFQ 1100 AGM1029, due October 20, 2026) for digital valve positioners with SBE and M/WBE prioritization on an initial-notice basis.