Siemens Siemens 3RK3 Series Output Module, 0 Inputs, 4 Outputs, 24 V dc Part: 3RK3251-1AA10

Siemens SIRIUS output module with four relay outputs for safety control applications.

Siemens Siemens 3RK3 Series Input Module, 8 Inputs, 0 Outputs, 24 V dc Part: 3RK3211-1AA10

Eight input safety module for Siemens SIRIUS 3RK3 control systems.

Siemens Siemens 3RK3 Series Input Module, 8 Inputs, 0 Outputs, 24 V dc Part: 3RK3311-1AA10

Siemens input module with eight channels for connecting sensors to SIRIUS safety control systems.

Siemens Siemens 3RK3 Series Input/Output Module, 4 Inputs, 2 Outputs, 24 V dc Part: 3RK3221-1AA10

Siemens safety input/output module with four inputs and two outputs for industrial automation systems.

Siemens Siemens 3RK3 Series Output Module, 0 Inputs, 4 Outputs, 24 V dc Part: 3RK3242-1AA10

Siemens safety output module with 4 channels for industrial automation control systems.

Siemens Siemens 3RK3 Series Input/Output Module, 4 Inputs, 2 Outputs, 24 V dc Part: 3RK3231-1AA10

Industrial input-output module with 4 inputs and 2 outputs for factory automation control systems.