The Allen-Bradley 1771-P4S/B is a 120V AC Power Supply Module designed for use within the 1771 series Universal I/O Chassis, including models 1771-A1B, -A2B, -A3B, and -A4B. This module provides a reliable 5V DC output at up to 8 Amperes, ensuring consistent power delivery to connected I/O modules.
Key Features
- Input Voltage Range: 97 to 132V AC at 47 to 63 Hz
- Output: 5V DC, 8 Amperes
- Module Width: Occupies a single slot within the I/O chassis
- Fuse Protection: Equipped with a 1.5A, 250V slow-blow fuse for enhanced safety
- Parallel Operation: Supports parallel configuration with another 1771-P4S module using a 1771-CT cable, allowing for increased current capacity up to 16 Amperes per chassis
Installation and Compatibility
The 1771-P4S/B module is compatible with various Allen-Bradley Universal I/O Chassis models, including 1771-A1B, -A2B, -A3B, and -A4B. It can be installed in any slot except the leftmost one, which is reserved for the Remote I/O Adapter Module. For optimal performance and to minimize electrical noise interference, it is recommended to position the power supply module away from analog input modules and low-voltage DC modules.
Operational Indicators
The front panel features a P/S ACTIVE indicator that illuminates green when the power supply is operating normally. This visual cue assists in quick diagnostics and ensures that the module is supplying power to the backplane effectively.
Technical Specifications
- Nominal Input Voltage: 120V AC
- Input Power: 59 Watts
- Apparent Input Power: 89 VA
- Transformer Load: 148 VA
- Backplane Output Current: 8 Amperes at 5V DC
- Frequency: 47 to 63 Hz
- Fuse: 1.5A, 250V, slow-blow
- Dimensions: Occupies 1 chassis slot
- Weight: Approximately 0.9 kg
This used Allen-Bradley 1771-P4S/B Power Supply Module offers a cost-effective solution for maintaining or expanding existing PLC-5 systems, delivering dependable performance and compatibility with a range of I/O chassis configurations.
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