Brief Product Description

Allen‑Bradley 80026-173-23 is an industrial rack power supply dedicated for ControlLogix 1756 chassis. It converts AC input to DC backplane power for ControlLogix CPU, communication and I/O modules. It provides stable power for 1756 series rack, built-in overvoltage, overcurrent and over-temperature protection, with power status LED indicators. This legacy power unit has been phased out by Rockwell, only surplus and fully refurbished tested units available for existing ControlLogix system maintenance and spare replacement.

Core Product Functions

• Power supply for Rockwell 1756 ControlLogix chassis
• Wide range AC input, convert to DC backplane power for rack modules
• Built-in protection: overvoltage, overcurrent, short-circuit, overtemperature protection
• Front panel LED indicators for power healthy and fault diagnosis
• Supply power to CPU, I/O modules, communication cards via chassis backplane
• Designed for industrial continuous operation in factory control cabinet
• Support hot replacement with proper LOTO safety lockout procedures

Application Scenarios

• Legacy ControlLogix PLC cabinet backplane power supply
• Chemical, water treatment, power plant auxiliary control cabinet
• Metallurgy, packaging, automotive production line automation control rack
• Oil & gas pipeline, compressor station PLC control cabinet
• Old ControlLogix system spare replacement, maintenance and retrofit projects

FAQ (Frequently Asked Questions)

• Q: Chassis no power after installing 80026-173-23?
  A: Check AC input wiring and voltage, confirm no short circuit on backplane modules, check over-temperature protection, power LED status and chassis backplane connection.
• Q: What is the difference between 80026-173-23 and 1756-PA72?
  A: Both for ControlLogix rack power; 1756-PA72 is standard model number, 80026-173-23 is drawing/part number variant, need to confirm power rating and chassis compatibility before replacement.
• Q: Can it be used for new automation projects?
  A: End-of-life legacy spare part, no new original production. Recommend using current standard ControlLogix power supply models. Only surplus/refurbished units for existing system maintenance.
• Q: Common failure modes?
  A: Internal electrolytic capacitor aging, input rectifier damage, over-temperature shutdown under heavy load, connector pin oxidation.