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The Allen-Bradley 1746-P1 is a dedicated power supply module designed for use within the SLC 500 programmable logic controller system. This rack-mounted unit provides the necessary DC power to the backplane, supporting the CPU and various I/O modules installed in the chassis. It is engineered to operate across a wide range of AC line voltages, ensuring compatibility with diverse industrial power environments.
| Parameter | Specification |
|---|---|
| Input Voltage | 85-132 / 170-265 VAC |
| Frequency | 47-63 Hz |
| Internal Current Capacity | 2A at 5 VDC, 0.46A at 24 VDC |
| User Power Output | 200 mA at 24 VDC |
| Max Inrush Current | 20A |
| Power Requirement | 135 VA |
| Operating Temperature | 0 degC to 60 degC |
| Fuse Protection | 1746-F1 or equivalent |
The 1746-P1 acts as the main power source for the SLC 500 rack, converting incoming AC line voltage into the regulated DC voltages required by the processor and I/O modules.
Yes, the module provides a 24 VDC user power output with a capacity of 200 mA, which can be used to power compatible field devices or sensors.
First, check the input voltage and the status of the external fuse. If the module remains unresponsive, it may require replacement. Always ensure the replacement unit is a genuine Allen-Bradley 1746-P1 to maintain system integrity.