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The SIRIUS auxiliary contact block 3RH2911-1HA22 from Siemens has two NO and two NC contacts. This makes the auxiliary contact block 3RH2911-1HA22 an ideal complement to contactor relays and power contactors of size S00 and S0. The screw-type connection ensures easy installation. Typical fields of application include motor and plant control, switching of light controls and multiplication of signals.