Allen-Bradley 1771-P2 Power Supplies
The Allen-Bradley 1771-P2, also cataloged as the 1771-P2 Power Supply Module, operates as a dedicated hardware component for AC line voltage conversion and DC backplane power distribution within Allen-Bradley PLC-5 systems. It mounts directly into a 1771 chassis slot to convert 120/240 VAC mains input into a regulated 5.1 VDC output for downstream processor and I/O module operation.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1771-P2 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 10.01 lbs (4.54 kg) |
| Dimensions | Standard 1771 Single-Slot Power Supply Chassis Form Factor |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Input: 120/240 VAC (50/60 Hz, 1.0/0.5 A) |
| Output Voltage | 5.1 VDC |
| Output Current Rating | 6.5 A |
| Subsystem Type | AC Power Supply Module |
Backplane Bus Communication Velocity & I/O Density Scaling
The 1771-P2 power supply module maintains low-ripple DC power delivery to ensure backplane bus communication velocity stability across high-density I/O configurations. Designed to support localized chassis bus segments, its onboard voltage regulation circuitry counteracts line transients and input fluctuations without degrading signal levels across parallel backplane communication lines. Internal current-limiting safeguards prevent localized overcurrent conditions from compromising adjacent processor and communication cards.
Frequently Asked Questions
Q: What is the maximum current load the 1771-P2 power supply can deliver to the backplane?
A: The 1771-P2 provides a maximum regulated output current of 6.5 A at 5.1 VDC directly to the 1771 chassis backplane bus.
Q: How is input AC voltage selection configured on the 1771-P2 module?
A: Mains voltage compatibility (120 VAC or 240 VAC at 50/60 Hz) is selected via internal jumper settings or terminal wiring configurations prior to energizing the module.
Field Installation Guidelines
- Chassis Slot Insertion: Turn off all primary power sources before mounting. Insert the 1771-P2 module firmly into the designated power supply slot of the 1771 chassis until the retaining latch engages.
- AC Line Wiring: Wire the incoming 120 VAC or 240 VAC utility lines to the screw terminals on the front assembly, adhering to correct line, neutral, and ground terminations.
- Equipotential Grounding: Connect a low-impedance copper ground wire from the power supply chassis ground point to the main cabinet earth ground bar to suppress electrical noise.
Allen-Bradley 1771-P2 Power Supplies
Allen-Bradley 1771-P2 Power Supplies
The Allen-Bradley 1771-P2, also cataloged as the 1771-P2 Power Supply Module, operates as a dedicated hardware component for AC line voltage conversion and DC backplane power distribution within Allen-Bradley PLC-5 systems. It mounts directly into a 1771 chassis slot to convert 120/240 VAC mains input into a regulated 5.1 VDC output for downstream processor and I/O module operation.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1771-P2 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 10.01 lbs (4.54 kg) |
| Dimensions | Standard 1771 Single-Slot Power Supply Chassis Form Factor |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Input: 120/240 VAC (50/60 Hz, 1.0/0.5 A) |
| Output Voltage | 5.1 VDC |
| Output Current Rating | 6.5 A |
| Subsystem Type | AC Power Supply Module |
Backplane Bus Communication Velocity & I/O Density Scaling
The 1771-P2 power supply module maintains low-ripple DC power delivery to ensure backplane bus communication velocity stability across high-density I/O configurations. Designed to support localized chassis bus segments, its onboard voltage regulation circuitry counteracts line transients and input fluctuations without degrading signal levels across parallel backplane communication lines. Internal current-limiting safeguards prevent localized overcurrent conditions from compromising adjacent processor and communication cards.
Frequently Asked Questions
Q: What is the maximum current load the 1771-P2 power supply can deliver to the backplane?
A: The 1771-P2 provides a maximum regulated output current of 6.5 A at 5.1 VDC directly to the 1771 chassis backplane bus.
Q: How is input AC voltage selection configured on the 1771-P2 module?
A: Mains voltage compatibility (120 VAC or 240 VAC at 50/60 Hz) is selected via internal jumper settings or terminal wiring configurations prior to energizing the module.
Field Installation Guidelines
- Chassis Slot Insertion: Turn off all primary power sources before mounting. Insert the 1771-P2 module firmly into the designated power supply slot of the 1771 chassis until the retaining latch engages.
- AC Line Wiring: Wire the incoming 120 VAC or 240 VAC utility lines to the screw terminals on the front assembly, adhering to correct line, neutral, and ground terminations.
- Equipotential Grounding: Connect a low-impedance copper ground wire from the power supply chassis ground point to the main cabinet earth ground bar to suppress electrical noise.
