Siemens SIMATIC S7-200 Add-On Modules
- Siemens 6ES7231-7PD22-0XA0, This module from the SIMATIC S7-200 modular range has 4x analogue inputs that can accept either voltages or thermocouple outputs (TC types J, K, S, T, R, E, N). Siemens 6ES7231-7PD22-0XA0 SPS Add on Module EM 231