8-channel analog input for mixed signals
The Siemens 6ES7331-1KF01-0AB0 is an 8-channel analog input module for the S7-300 family, accepting RTD, voltage, current, and resistance signals on a single card. RTD support covers Pt100 (standard/climate), Ni100 (standard/climate), Ni1000, and LG-Ni1000; thermocouple and Cu10 are not supported. Voltage ranges include ±10 V, 1 to 5 V, ±1 V, and ±5 V; current inputs accept 0 to 20 mA and 4 to 20 mA; resistance measurement up to 600 Ω is also available. The module occupies one 40 mm slot in the S7-300 rack (125 mm height, 117 mm depth), fitting standard DIN-rail mounting.