Siemens SIMATIC ET 200S PLC I/O Module 4 Inputs, 500 mA 24 V dc, 81 x 15 x 52 mm. Input Type: Digital. For Use With: SIMATIC ET 200S Series. Length: 81mm. Width: 15mm. Depth: 52mm. Minimum Operating Temperature: 0°C. Maximum Operating Temperature: +55°C. MPN: 6ES7131-4BD01-0AB0