Allen-Bradley 1746-P2 SLC 500 Power Supply Module 120/220V AC

Technical Specifications Breakdown

Key parameters for the 1746-P2 are listed below for quick reference:

Industry Applications

Its 24VDC output supports sensors, actuators, and interface modules, while the built-in fuse protection guards against short-circuit faults. The 1746-P2 ensures uptime in critical applications such as packaging, assembly, and water treatment.

Installation & Setup Guidance

Install the power supply in the leftmost slot of a 1746 chassis. It does not count toward slot numbering; slot zero is reserved for the processor or communication adapter. Set the input voltage using the jumper pins: choose 100/120 VAC or 200/240 VAC before applying power. Use two AWG wires maximum per terminal. Always disconnect input power before wiring to avoid electrical arcs that could damage the backplane.

Maintenance & Reliability

Inspect the power supply periodically for dust accumulation and ensure the enclosure remains free of debris. The operating temperature range is 0 to 60 Celsius, so adequate ventilation is important. The internal fuse (1746-F1 or equivalent) provides short-circuit protection but does not replace external overcurrent devices. Verify the fuse condition if the unit fails to power up.

Power Supply for SLC 500 Systems

The Allen-Bradley 1746-P2 is a modular power supply from the SLC 500 series, designed to deliver reliable DC power to the backplane and connected modules. It accepts a nominal input voltage of 120/220 Volts AC and provides an internal current capacity of 5 A at 5V dc and 0.96 A at 24V dc. This unit ensures stable operation of your SLC 500 controller, even under demanding industrial conditions.

Compatibility & Integration

The 1746-P2 is designed exclusively for the SLC 500 chassis. It provides backplane current of 5 amps at 5 Volts and 0.46 Amps at 24 Volts. The CPU hold-up time is 20 ms at full load and 3000 ms at no load, allowing the processor to continue operation during brief undervoltage events.

Selection Guide & Purchasing Advice

When selecting a replacement power supply for your SLC 500 system, the 1746-P2 is a direct fit. Ensure your chassis model and processor are compatible. Contact AutoDCSTech for current lifecycle status and availability before ordering. We stock genuine Allen-Bradley parts to keep your automation running.

Troubleshooting & Common Issues

If the power supply shuts down due to overcurrent, the recovery procedure depends on the series. For Series A and B, reload the user program after a CPU fault. For Series C, correct the overcurrent condition to restore 24V DC user power. Undervoltage conditions cause the CPU to turn off if input voltage remains low beyond the hold-up time; operation resumes automatically when voltage returns to normal.