Overview
The Allen-Bradley 1746-P4 is a modular power supply for the SLC 500 platform. It operates at 85-132/170-250V AC with 47-63 Hz frequency, typically consuming 150VA. The 1746-P4 provides backplane power to a local chassis, expansion module or a remote I/O chassis, making it essential for SLC 500 control systems. This power supply can be used with every rack mounted SLC processor, including the SLC 5/01, 5/02, 5/03, 5/04, 5/05.
Key Features
- Rack mounted design with 120/240 VAC input at 150 VA, 50/60 Hz
- Internal capacity of 10.0 A @ 5V dc and 2.88 A @ 24V dc
- Hold-up time of 20 ms (full load) and 3000 ms (no load) for continuity during power dips
- UL Listed as Industrial Control Equipment and certified for CSA Certified Process Control Equipment for Class 1, Div 2, Groups A, B, C, D Hazardous Locations
- Higher internal current capacity supports a larger number of modules; ideal for larger applications compared to 1746-P1 and 1746-P2
- LED indicator shows power-on status for convenient monitoring of supply operation
Technical Specifications
The 1746-P4 has a line voltage of 85-132/170-265V ac at 47-63 Hz, typical line power requirement of 240 VA, and maximum inrush current of 45A. Overcurrent protection is 15A with an operating temperature range of 0 to 60 degrees Celsius. The unit provides 24VDC voltage output with built-in fuse protection.
Typical Applications
This power supply works with all rack mounted SLC 500 processors including SLC 5/01 through SLC 5/05. It is commonly deployed in discrete manufacturing, process control, and material handling systems where SLC 500 platforms manage motor drives, solenoids, valves, and I/O modules. The power supply mounts directly onto the left end of the 1746 I/O chassis to provide power to each I/O slot and the processor.
Compatibility & Replacements
Compatible With
- Allen-Bradley SLC 500 modular chassis (1746 series)
- SLC 5/01, 5/02, 5/03, 5/04, 5/05 processors
- Allen-Bradley 1746 I/O modules (input, output, analog, communication)
- SLC 500 remote I/O and expansion modules
Replaces / Drop-In Replacement For
The 1746-P4 /A (Series A) is the current production version. Earlier series may exist; verify serial number against your system requirements before ordering. Models of 1746-P2 series A (A, B) and 1746-P4 series A should restart the user program after shutting down or experiencing faults while operating.
Works With
- RSLogix 500 programming software
- Studio 5000 (for legacy system integration)
- EtherNet/IP through optional communication modules
- PROFIBUS DP and DeviceNet via 1746 adapter modules
- Allen-Bradley FactoryTalk View (for HMI integration)
