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RA4 is an interface relay designed to receive 24 V DC signals delivered by PLC?s or other sources with a low output power and to restore them with sufficient power to operate the coils of the relevant AF09 ... AF96 contactors or the NF contactor relays. RA4 interface relay is made up of a miniature electromechanical relay equipped with a N.O. contact and with a low consumption 24 V DC coil. The interface relay coil is controlled by the PLC while the N.O. contact ensures switching of the power contactor. ? Easy to install: less compact than other market solutions, RA4 is simply clipped on the top of the contactor ? Optimum interface: it accept all 24 VDC low outpout power signals down to 20 mA 24 V DC ? Optimize your logistics and cost, thanks to 1 single RA4 interface relay for AF09...AF96 / NF monitoring control voltages up to 250V AC, without any additional accessory or wiring for assembling.