{"product_id":"reliance-electric-57c491-automax-power-supply-unit","title":"Reliance Electric 57C491 Automax Power Supply Unit","description":"\u003cdiv\u003e\u003cp\u003eReliance Electric 57C491 AutoMax Power Supply Module, designed for AutoMax DCS 5000 rack systems and built for Lorain ES281CMB enclosures with a keyed access, is a 275-watt DC power module with multiple output rails: +5 VDC at up to 30 A, ±12 VDC at 4 A, and ±15 VDC at 1 A. It accepts a nominal 120 VAC input (100–132 VAC acceptable) at up to 5 A and provides robust isolation and protection for industrial automation applications, including 1500 VAC input-to-output isolation and 600 VDC output-to-chassis isolation, plus an 8 A, 250 VAC AGC normal-blow fuse and over-voltage\/over-current protection. The unit's dimensions are 11¾ inches high, 4 inches wide, and 7¾ inches deep, with a weight of about 8½ lb, and it features a hold-up time of at least 20 ms after AC input loss and a soft-start that ramps outputs smoothly on power-up. Efficiency is specified at a minimum of 70% at nominal line and full load, with regulation maintaining the ± outputs within tight tolerances. This power supply module is documented as M\/N 57C491 within Reliance Electric AutoMax hardware, and its Lorain ES281CMB enclosure pairing with a keyed access aligns with its intended industrial control role. \u003c\/p\u003e\u003c\/div\u003e","brand":"Reliance","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46285442089194,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-024.png?v=1788727428","url":"https:\/\/gtghardware.com\/products\/reliance-electric-57c491-automax-power-supply-unit","provider":"GTG Hardware","version":"1.0","type":"link"}