{"product_id":"schmersal-srb-301lc-24v-safety-relay","title":"Schmersal SRB 301LC-24V Safety Relay","description":"\u003cdiv\u003e\u003cp\u003eSchmersal SRB301LC-24V is a three-safety-contact safety relay module that processes non-potential-free safety contacts and provides a dedicated signaling output for safety circuits. It is designed for use in machine safety systems to monitor devices such as emergency-stop buttons, guard systems, and pull-wire emergency stop switches. The unit operates from a 24 V DC control supply and features three safety contacts plus one signaling\/auxiliary output; input currents are typically around 0.1 A with digital inputs showing a conduction resistance up to 40 Ω, and the auxiliary contact switches up to 2 A at 24 V DC. The module is 22.5 mm wide and rated IP40 for protection against dust and incidental contact; it also supports automatic reset (auto-reset) and is designed to detect cross-short, cable breaks, and earth-leakages in the monitoring circuit. For configuration, it shows wiring options such as bridging S11\/S12 and S21\/S22 for automatic start in certain setups, and uses standard X1\/X2 feedback connections in multi-channel arrangements. Typical applications include guarding doors and interlocks, emergency-stop systems, and cross-wire monitoring of safety circuits to maintain safe operation. \u003c\/p\u003e\u003c\/div\u003e","brand":"Schmersal","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46283991253226,"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-021.png?v=1788727428","url":"https:\/\/gtghardware.com\/products\/schmersal-srb-301lc-24v-safety-relay","provider":"GTG Hardware","version":"1.0","type":"link"}