Siemens 3TK2907-0BB4 Contactor Expansion Module

Siemens 3TK2907-0BB4 Contactor Expansion Module is an auxiliary expansion card in the Siemens SIGUARD/SIEMENS 3TK safety contactor family, designed to be mounted with 3TK280x-0xx4 contactors. It provides seven enabling circuits and supports DC operation with a DC 24 V solenoid system, enabling circuits supplied by 24 V DC. This expansion module is intended to extend the safety and control logic of a contactor assembly, allowing additional DC-enabled paths within the base 3TK contactor combination 7 setup. The part is explicitly identified by the 3TK2907-0BB4 designation and is used in DC-powered control configurations where enhanced enabling circuit functionality is required in industrial automation environments.