Allen-Bradley 1771-P7 PLC-5 Power Supply Module
The Allen-Bradley 1771-P7, also cataloged as the 1771-P7 Power Supply Module, operates as a dedicated hardware component for 5 VDC system power delivery within Allen-Bradley PLC-5 1771 I/O chassis platforms. It converts 120/220 VAC primary supply power into a regulated 16 A 5 VDC output stream to drive backplane communication buses, processor modules, and I/O cards.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1771-P7 |
| Brand | Allen-Bradley |
| Origin | United States |
| Weight | 3.99 lbs (1.81 kg) |
| Dimensions | Standard 1771 Universal Chassis Slot Form Factor |
| Operating Temp | 0 to +60 deg C (+32 to +140 deg F) |
| Power Consumption | Power supply module (120/220 VAC primary input) |
| Input Voltage | 120/220 VAC (Selectable, 50/60 Hz) |
| Output Current | 16 A @ 5 VDC |
| Product Family | PLC-5 / 1771 Universal I/O |
| Module Type | Power Supply Module |
Backplane Bus Communication Velocity and Firmware Flash Performance
Occupying a dedicated power slot in the 1771 universal chassis, the module supplies continuous logic current to maintain high-speed backplane bus communication velocity across multi-processor networks. Stable voltage regulation prevents memory corruption and mid-execution resets during controller operations or firmware flash compatibility routines on adjacent PLC-5 processors and communication cards.
Frequently Asked Questions
Q: Can the 1771-P7 module operate on both 120 VAC and 220 VAC primary power sources?
A: Yes, the module accepts either 120 VAC or 220 VAC nominal input power at 50/60 Hz based on the jumper setting or wiring configuration on the chassis power terminal strip.
Q: What is the maximum backplane logic current provided by the 1771-P7?
A: The module supplies up to 16 A at 5 VDC directly to the 1771 backplane bus to power inserted processor and I/O modules.
Field Installation Guidelines
- Turn off all main power sources feeding the 1771 chassis before installing or removing the 1771-P7 module.
- Align the module card guide with the far-left dedicated power slot of the 1771 universal chassis and push firmly until seated.
- Wire incoming AC power conductors (120 VAC or 220 VAC) to the designated terminal block using properly rated copper wire.
- Verify that the system ground wire connects directly to the chassis ground stud using a low-impedance grounding strap.
- Apply primary power and confirm that the front panel LED indicator illuminates green to signal healthy 5 VDC output.
Allen-Bradley 1771-P7 PLC-5 Power Supply Module
Allen-Bradley 1771-P7 PLC-5 Power Supply Module
The Allen-Bradley 1771-P7, also cataloged as the 1771-P7 Power Supply Module, operates as a dedicated hardware component for 5 VDC system power delivery within Allen-Bradley PLC-5 1771 I/O chassis platforms. It converts 120/220 VAC primary supply power into a regulated 16 A 5 VDC output stream to drive backplane communication buses, processor modules, and I/O cards.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1771-P7 |
| Brand | Allen-Bradley |
| Origin | United States |
| Weight | 3.99 lbs (1.81 kg) |
| Dimensions | Standard 1771 Universal Chassis Slot Form Factor |
| Operating Temp | 0 to +60 deg C (+32 to +140 deg F) |
| Power Consumption | Power supply module (120/220 VAC primary input) |
| Input Voltage | 120/220 VAC (Selectable, 50/60 Hz) |
| Output Current | 16 A @ 5 VDC |
| Product Family | PLC-5 / 1771 Universal I/O |
| Module Type | Power Supply Module |
Backplane Bus Communication Velocity and Firmware Flash Performance
Occupying a dedicated power slot in the 1771 universal chassis, the module supplies continuous logic current to maintain high-speed backplane bus communication velocity across multi-processor networks. Stable voltage regulation prevents memory corruption and mid-execution resets during controller operations or firmware flash compatibility routines on adjacent PLC-5 processors and communication cards.
Frequently Asked Questions
Q: Can the 1771-P7 module operate on both 120 VAC and 220 VAC primary power sources?
A: Yes, the module accepts either 120 VAC or 220 VAC nominal input power at 50/60 Hz based on the jumper setting or wiring configuration on the chassis power terminal strip.
Q: What is the maximum backplane logic current provided by the 1771-P7?
A: The module supplies up to 16 A at 5 VDC directly to the 1771 backplane bus to power inserted processor and I/O modules.
Field Installation Guidelines
- Turn off all main power sources feeding the 1771 chassis before installing or removing the 1771-P7 module.
- Align the module card guide with the far-left dedicated power slot of the 1771 universal chassis and push firmly until seated.
- Wire incoming AC power conductors (120 VAC or 220 VAC) to the designated terminal block using properly rated copper wire.
- Verify that the system ground wire connects directly to the chassis ground stud using a low-impedance grounding strap.
- Apply primary power and confirm that the front panel LED indicator illuminates green to signal healthy 5 VDC output.
