Siemens 3SB38 Switch Module With Emergency Stop

Siemens 3SB38 Switch Module with Emergency Stop is a two-hand operation console in the SIRIUS 3SB3 family that couples a START/STOP/RESET command point with an emergency-stop function for safe machine control. This safety console design requires both hands to operate, helping prevent unintended starts and aligning with ISO 13850-latching emergency-stop behavior described in Siemens safety materials. The module is intended for integration into Safety Integrated System configurations with central safety components such as the 3RK3 family and safety relays like 3RT20, forming a cohesive MSS safety chain. Variant options include configurations like the 3SB38 01-0AB3, which features a yellow top plate to indicate EMERGENCY STOP and can be ordered with or without a protective collar depending on panel design. The 22 mm command-device format of the 3SB3 series supports standard Siemens contact blocks and lampholders as accessories, enabling straightforward signal extension and status indication at the operator point. Typical applications include presses, conveyors, and automated production lines where immediate E-stop and deliberate reset/start sequencing are required for safe restart after an emergency stop.