Analog Modules
4-56
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
4.11.1 Connecting resistance thermometers to the SM 331;
AI 8 x 13 bits
Two-conductor connection
With a two-conductor connection, you must insert jumpers on the module between
M–
and S–.
Backplane
bus
M+
M–
ADC
S–
Logic
Figure 4-19 Two-conductor connection of resistance thermometers to the SM 331;
AI 8x 13 bits
Three-conductor connection
M+
M–
ADC
S–
Backplane
bus
Logic
Figure 4-20 Three-conductor connection of resistance thermometers to the SM 331;
AI 8 x 13 bits
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