Siemens Simatic S7-300 - Page 298

Analog modules
6.8 Analog input module SM 331; AI 2 x 12 bit; (6ES7331-7KB02-0AB0)
S7-300 Automation System Module data
6-64 Manual, 08/2006, A5E00105505-04
Wiring: 2, 3, 4-wire connection of resistors or thermoresistors
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Figure 6-20 Wiring and block diagrams
① 4-wire connection, no compensation for line resistors
② 3-wire connection, no compensation for line resistors
③ 2-wire connection
Measuring range module settings
Measuring range Measuring range module setting
150 Ω
300 Ω
600 Ω
A
RTD-4L: Thermal resistance
(linear, 4-wire connection) (temperature
measurement)
Pt 100 Klima
Ni 100 Klima
Pt 100 Standard
Ni 100 Standard
A