1771-P7B Allen-Bradley Power Supply for PLC-5 Chassis
Manufacturer: ABB
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Part Number: 1771-P7B
Condition：New with Original Package
Product Type: Power Supply for PLC-5 Chassis
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Description
Product Overview
The Allen-Bradley 1771-P7B is a high-capacity AC power supply module designed for 1771 I/O chassis used in PLC-5 control systems. It converts incoming 120 VAC or 220 VAC line power into a regulated 5 VDC backplane supply, supporting processor, I/O, and communication modules within a single chassis.
The 1771-P7B is intended for stand-alone chassis operation and must not be connected in parallel with other power supplies. Its robust design supports continuous operation in industrial and process environments where PLC-5 systems remain in service.
Functional Description
The 1771-P7B power supply delivers up to 16 A of regulated DC current to the 1771 backplane. It supports both North American and international AC mains, automatically configured via wiring selection.
This module is commonly installed in the leftmost slot of a compatible 1771 chassis and supplies all installed modules through the backplane. Internal protection circuitry ensures stable voltage regulation under varying load conditions.
Technical Specifications
| Parameter | Details |
|---|---|
| Model | 1771-P7B |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Family | PLC-5 |
| Product Type | Power Supply Module |
| Input Voltage | 120 VAC (2.0 A) or 220 VAC (1.0 A) |
| Input Frequency | 47–63 Hz |
| Maximum Input Power | 108 W |
| Output Voltage | 5 VDC regulated |
| Output Current | 16 A (backplane supply) |
| Supported Chassis | 1771-A1B, A2B, A3B, A3B1, A4B |
| Compatible Controllers | PLC-5 processors, Mini-PLC-2 |
| Parallel Operation | Not supported |
| Isolation | AC to DC isolation |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | –40 °C to +85 °C |
| Certifications | CE (Series C), UL, CSA |
| Weight | 3.6–4.0 kg |
| Country of Origin | USA |
| Product Status | Discontinued by manufacturer |