Allen-Bradley 1771-A1B I/O Rack Chassis, 4-Slots

This is a legacy I/O chassis used with the Allen-Bradley PLC-5 series. It provides backplane communication and physical support for processor, I/O, and power supply modules.

Model: 1771-A1B
Slots: 4 (for I/O, processor, and power supply modules)
System: PLC-5 Classic Series
Backplane Voltage: 5.25 VDC
Backplane Current Capacity:
– Logic Plane: 16.0 A max @ 5.25 VDC
– Memory Plane: 0.5 A max @ 5.25 VDC
Mounting: Panel mount (vertical or horizontal)
Compatible Modules: 1771-series I/O, 1785 processors, power supplies
Power Supply Compatibility: 1771-P4S, 1771-P7, etc. (rear-mount or side-mount)
Indicators: None (passive chassis)
Chassis Material: Steel, zinc-plated
Standards: UL Listed, CSA
Country of Origin: USA