Siemens SIMATIC S7-400 Reference Manual page 274

Analog modules
5.23 Analog input module SM 431; AI 16 x 16 Bit (6ES7431-7QH00-0AB0)
Circuit diagram for SM 431; AI 16 x 16 bit
Meas. range
CH0
module 0
CH1
Meas. range
CH14
module 7
CH15
L+
Diagnostics
in
M
L+ loop
Figure 5-32 Circuit diagram for SM 431; AI 16 x 16 bit
274
I
const
Signal
jumper-
PGA
ing
+ 15 V
+ 5 V
0 V
-15 V
D
Bus S7-400
+ 5 V
Bus S7-400
0 V
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08