{"product_id":"reliance-electric-57404c-network-communication-module","title":"Reliance Electric 57404C Network Communication Module","description":"\u003cdiv\u003e\u003cp\u003eReliance Electric AutoMax Network Communication Module (57404C\/57C404C) provides the network interface that lets AutoMax PLC racks share control and status data over the AutoMax DCS-NET network, a distributed communications fabric for AutoMax controllers. The module connects to the network via a coaxial cable and offers an RS-232-compatible asynchronous link through a 25-pin D-shell connector; two thumbwheel switches configure the drop number, and a seven-segment LED displays error codes to guide troubleshooting. The device is designed for use within AutoMax rack networks, with every rack on the network typically containing a Network Communication Module to enable inter-rack communication, as described in AutoMax operation manuals (e.g., J2-3001). In operation, it transmits and receives data between racks, with status indicators and watchdog-related diagnostics (for example, if the OK indicator LED is off, a local watchdog failure is likely; an LED code “A” indicates an invalid drop number, and “C” signals a network fault).\u003c\/p\u003e\u003c\/div\u003e","brand":"Reliance","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46285467320554,"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-57404c-network-communication-module","provider":"GTG Hardware","version":"1.0","type":"link"}