57C491

About the 57C491

The 57C491 is Reliance Electric Power Supply Module. It could have also been produced by Asea Brown Boveri or Baldor Reliance as a vital part of their product lines. This power supply is no longer receiving any support for these original companies and may be slightly hard to find. AX Control usually attempts to keep this part in stock though.

This is a 275W Power Supply created for an AutoMax processing system. This power supply has the ability to convert input power to the DC current needed to provide power to modules and cards located on a card rack assembly. It has an input voltage of 120 VAC. It has a current rating of 5 amps at 120VAC. It has a frequency of 50/60HZ. It has a leakage current that can exceed 5mA. It has a fault current limit of 10 KVA. It has a DC output rating of 5VDC 30A, +/- 12VDC 4A, +/- 15VDC 1A, and +/- 5VDC 1 mA. It has a 275-watt continuous output power. It has an output current that gradually increases during the start-up process. This system has a 70% efficiency when it comes to its line voltage and full load. This module has an isolation rating of 1500VAC input-to-output and 600 VDC output-to-chassis. 

The 57C491’s front faceplate has several key features. It has four LED indicators labeled power on, P/S ready, system ready, and blown fuse.  It has a key switch system labeled setup, memory protect, and program. This device normally comes with two keys. It has a removable terminal switch. It has a fuse slot that uses a type 250V fuse and it has a battery backup.