Product Summary
The 1746-P4 is a critical SLC 500 power supply module from Rockwell Automation. It delivers reliable backplane power to local, expansion, or remote I/O chassis. This unit accepts a wide input voltage range of 85 to 250 Volts AC. It provides stable power to all connected modules in the rack.
Expert Technical Evaluation & Performance Review
The 1746-P4 offers robust power delivery for demanding industrial environments. This unit supplies 10.0 Amps at 5 Volts DC and 2.88 Amps at 24 Volts DC internally. Such capacity ensures stable operation for multiple I/O and processor modules. Engineers value its wide input voltage range of 85 to 250 Volts AC. This flexibility allows the unit to work with global power standards.
The power supply includes a critical feature called hold-up time. This capability lets the processor continue logic execution during brief power dips. The 1746-P4 provides a hold-up time of 20 milliseconds at full load. This time extends to 3000 milliseconds with no load. This feature prevents costly data loss or process interruptions. Normal operation resumes automatically once the input voltage stabilizes.
Engineers must note the proper use of the 24VDC output. This output can power external devices like sensors or indicators. However, do not use it to supply output modules directly. Doing so complicates troubleshooting significantly. You would need to shut down the entire SLC 500 rack to service one module. Always follow best practices for power distribution in your system.
The unit operates reliably within a temperature range of 0 to 60 degrees Celsius. This thermal tolerance suits most factory floor environments. The power supply includes built-in fuse protection using a 1746-F1 fuse. This safety feature guards against overcurrent conditions. The module fits a standard 1746 chassis with dimensions of 5.5 x 4.3 x 5.7 inches.
Product Procurement & Buyer Guide
Procurement managers should verify compatibility before purchasing this module. The 1746-P4 is designed exclusively for the SLC 500 platform. It provides backplane power to make all connected modules operational. The processor can then recognize and communicate with these modules.
This power supply carries essential safety certifications for industrial use. It is UL Listed as Industrial Control Equipment. The unit also holds CSA certification for Process Control Equipment. It is approved for Class 1, Div 2, Groups A, B, C, D hazardous locations. These certifications ensure compliance with strict safety regulations.
The unit draws a typical line power of 180 VA and has an input power of 92 Watts. The inrush current is 45 Amps, which is important for circuit breaker selection. The operating frequency range is 47 to 63 Hertz. This component weighs only 2.5 pounds for easy handling during installation.
The backplane current capacity is 10 Amps at 5 Volts and 0.46 Amps at 24 Volts. The output voltage range is 18 to 30 Volts DC. These specifications ensure the unit meets the power needs of your specific SLC 500 configuration. Always calculate your total system load before ordering.
Logistics & Standard Packaging Details
- One Allen-Bradley 1746-P4 SLC 500 Power Supply Module
- Manufacturer: Rockwell Automation
- Brand: Allen-Bradley
- Part Number: 1746-P4
- Express delivery shipping is available via FedEx, UPS, and DHL.
