UNSPSC 32151600: Programmable logic controller subsystems

UNSPSC 32151600 Programmable logic controller subsystems, a Class code, encompasses the procurement of PLC hardware, integrated SCADA control systems, and related modernization services that state and local governments use to upgrade water treatment plants, municipal infrastructure, and operational facilities. Recent solicitations show state and local buyers acquiring complete PLC replacements paired with HMI system upgrades, network architecture conversions, Factory Acceptance Testing, operator training, and multi-year maintenance contracts—often bundled as end-to-end control system integration rather than component-only purchases. The issuing bodies include water utilities (municipal water departments and special-purpose districts), state agencies managing infrastructure, colleges seeking classroom technology control, and transit authorities, with repeat activity concentrated in water treatment facility modernization across multiple jurisdictions.

Recent opportunities span the Southeast, Southwest, and California with significant concentration in water treatment modernization. The City of Atlanta Department of Watershed Management posted two major SCADA upgrade opportunities in May 2026—PE66062NONST2026000000376 for Hemphill Water Treatment Plant (RFP with May 29, 2026, response deadline) and PE66062NONST2026000000374 for Chattahoochee Water Treatment Plant (identical May 29 deadline)—both involving replacement of GE iFix systems with Schneider Electric AVEVA Wonderware, conversion to Ethernet/IP, installation of Allen-Bradley ControlLogix 5580 controllers, and 360-day implementation timelines. The City of Santa Fe's Buckman Direct Diversion (RFP FY26-RFP-036, posted February 9, 2026) seeks PLC replacement and SCADA modifications using Schneider Electric Unity Pro XL software across four treatment facilities. The Eastern Municipal Water District in California (RFB 3921, posted March 26, 2026) procured three 500HP Variable Frequency Drives for Palomar Booster with April 30, 2026, response deadline. The California Department of Veterans Affairs (quotation 26YS0018, posted March 12, 2026, due April 2, 2026) sought comprehensive SCADA maintenance services for non-ISD systems with a requirement that winning vendors be certified small or micro businesses. Valencia College District in Florida (RFP 2026-26, posted April 6, 2026, due April 30, 2026) requested classroom and conference room technology integration across 900 rooms with approximately $1.6 million annual historical spending and programming/controls component requirements.