The Siemens SM 1223 PLC analogue I/O expansion module has a 4 input and 2 output with a signal range of 4 to 20mA. It supports output in the form of current as well as voltage. It supports output in the form of current as well as voltage. It has advanced features like alarms and diagnostics that make it an ideal choice for analogue applications.
SIMATIC S7-1200, Analogue input/output, SM 1234, 4 analogue inputs/2 analogue outputs, +/- 10 V 14-bit resolution, 0(4)-20 mA 13-bit resolution