Analog modules
6.9 Analog input module SM 331; AI 8 x RTD; (6ES7331-7PF01-0AB0)
S7-300 Automation System Module data
6-74 Manual, 08/2006, A5E00105505-04
Caution
Any faulty wiring of 3-wire connections may cause unforeseeable module states and
hazardous plant states.
Wiring: 2, 3 and 4-wire connection for resistor and thermoresistor measurement
Wiring possible at both ends at channel 0 to channel 7
Note
The module's product status 02 must be configured with an unused channel of an active
group of channels in order to avoid incorrect measurements.
0
0
ದ
,
F
,
F
0
0
ದ
,
F
,
F
0
0
ದ
,
F
,
F
0
0
ದ
,
F
,
F
/ 0 ದ
0
/
0
&+
0
ದ
,
F
,
F
ದ
0
&+
0
ದ
,
F
,
F
ದ
0
&+
0
ದ
,
F
,
F
ದ
0
&+
0
ದ
,
F
,
F
ದ
&+
&+
&+
&+
'&
'&
Figure 6-22 Wiring and block diagrams
① 4-wire connection
② 3-wire connection
③ 2-wire connection
④ Digital-to-Analog Converter
⑤ Backplane bus interface
⑥ Analog-to-Digital Converter (ADC)
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