Siemens Sirius Safety relay, basic unit, spring, 3NO + 1NC, 24VDCProduct Overview The 3SK1121 2AB40 is a SIRIUS safety relay basic unit from the advanced series, designed for sophisticated 24 V DC safety applications requiring enhanced functionality and performance. This advanced safety relay provides 3 NO contacts for relay enabling circuits plus 1 NC contact for relay signaling circuit, offering superior safety monitoring and control capabilities. The device incorporates spring type terminals with push in
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