SIMATIC S7-300, analog input SM331, optically isolated, 8AI, resolution 9/12/14 BITS,
U/I/thermocouple/ resistance interrupt, diagnostics;
1x20pin remove/ insert W. backplane BUS

Supply voltage:
Load voltage L+: 24V
Reverse polarity protection: yes
Input current:
From load voltage L+ (without load), max.: 200 mA
From backplane bus 5VDC, max. 50mA
Power loss, typ.: 1W
Analog inputs:
Number of analog inputs: 8
Number of analog inputs for resistance measurement: 4
Permissible input voltage for voltage input (destruction limit), max.: 20V, continuous, 75V for max. 1s (mark to space ratio 1:20)
Permissible input current for current input (destruction limit), max.: 40mA
Input ranges:
Voltage: yes
Current: yes
Thermocouple: yes
Resistance thermometer: yes
Resistance: yes