Coupling relay in an industrial housing 3 changeover contacts hard gold-plated wide voltage AC/DC 24 V to 240 V spring-loaded connection Coupling relay in an industrial housing SIRIUS 3RQ2 for coupling control signals from and to a controller.All 3RQ2 coupling relays have a wide-range voltage input and can therefore be used universally. The reduction in variants leads to cost savings. Even at low currents, a high level of contact reliability is present. Removable terminals enable easy device replacement and quick wiring.Devices are available with one to three changeover contacts, with screw or spring-loaded connection (push-in), some also with hard gold-plated contacts for switching small currents.The 3RQ2 coupling relays replace the proven 3RS18 series.SIRIUS relays - a program for all cases.