- Supports a documented redundant 5 V DC chassis-power arrangement
- Allows up to four compatible supplies with system capacity based on the installed quantity
- Provides an alarm contact for monitoring loss of a supply within the redundant system
1771-P4R is an Allen-Bradley redundant AC-input power-supply module for compatible 1771 I/O chassis.
Multiple 1771-P4R supplies share the chassis load so that the configured system can continue operating after a supported single-supply fault.
Calculate the complete chassis demand and verify every supply position, interconnection and alarm circuit before replacing or adding a module.
Availability, condition, price, and shipping time for 1771-P4R are confirmed during quotation.
Allen-Bradley 1771-P4R 8 A Redundant PLC-5 Power Supply Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Install two to four supplies in adjacent supported chassis slots
- Assign each supply a unique identifier within the redundant group
- Connect the redundancy cables and configuration zones in the documented sequence
- Configure the terminal-block jumpers for local or remote sensing
- Preserve the existing sense wiring when replacing one supply
- Verify that the sense arrangement agrees across the complete supply group
- Use the active-supply indicator to confirm each operating module
- Use the nonredundant indicator and alarm relay to detect loss of redundancy
- Verify the total backplane load against the N+1 capacity before returning the chassis to service
- N+1 backplane power for high-availability PLC-5 chassis
- Redundant supply groups for supported 1771 racks
- Alarm-monitored replacement of legacy PLC-5 chassis power