The Allen-Bradley 1746-P3 is a dedicated DC system power supply module engineered for the SLC 500 controller platform. Designed for environments where 24V DC is the primary power source, this module provides reliable, regulated backplane power to the SLC processor and its associated I/O modules. It is particularly well-suited for mobile equipment, solar-powered installations, and industrial facilities utilizing a centralized DC bus architecture.
Features
Input Compatibility: Operates on a nominal 24V DC input with a functional range of 19.2 to 28.8V DC.
Backplane Power: Delivers 3.6 Amps at 5V DC and 0.87 Amps at 24V DC to the chassis backplane.
Robust Design: Features 600V AC RMS isolation voltage to mitigate industrial electrical noise.
Circuit Protection: Equipped with a replaceable 1746-F3 fuse to protect against overcurrent conditions.
Hold-up Time: Provides 5 ms of hold-up time at full load to maintain system stability during minor power fluctuations.
Technical Specifications
Parameter
Specification
Brand
Allen-Bradley
Product Line
SLC 500
Input Voltage Range
19.2 - 28.8V DC
Inrush Current
20.0 Amps (max)
Output (5V DC)
3.6 Amps
Output (24V DC)
0.87 Amps (870 mA)
Input Power
61 Watts
Operating Temperature
0 to 60 degC (32 to 140 degF)
Installation Guidelines
Mounting: The 1746-P3 must be installed in the far-left slot of the 1746 chassis.
Safety: Always disconnect the main power source before installing or removing the power supply from the chassis.
Grounding: Ensure the chassis is properly grounded according to local electrical codes to maintain noise immunity and safety.
Environment: Maintain adequate clearance around the module for ventilation. Ensure the operating environment remains within the specified temperature range of 0 to 60 degC.
Handling: Use standard ESD precautions when handling the module to prevent damage to internal electronic components.
FAQ
What is the primary application for the 1746-P3?
The 1746-P3 is intended for SLC 500 systems that require a 24V DC power input, rather than standard AC mains. It is ideal for remote, mobile, or battery-backed industrial control applications.
Can I replace the fuse on this module?
Yes, the module is designed with a replaceable 1746-F3 fuse to protect the internal circuitry from overcurrent events.
