Siemens Simatic S7-400 - Page 304

Circuit diagram for SM 431; AI 8 x 16 bit
M0+
M0+
R0
M0-
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH0
A/Dconverter
Internal
supply
Backplane
bus interface
Bus S7-400
Figure 5-38 Circuit diagram for SM 431; AI 8 x 16 bit
Note
An external protective network for the signal lines is required in accordance with IEC 61000-4-5
(12 V Blitzductor, model CT919-506, connected in series with all inputs as recommended by
the manufacturer).
Analog modules
5.25 Analog input module SM 431; AI 8 x 16 Bit (6ES7431-7KF00-0AB0)
S7-400 Automation System Module Data
304 Reference Manual, Ausgabe 11/2016, A5E00850736-08