M72166-Xxx00) To An Isolated Ai - Siemens SIMATIC S7-300 Reference Manual
Programmable logic controllers module data
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- Manual (676 pages) ,
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Table 4-45 Ordering Data of the Comparison Point
Recommended Compensating Box
Reference junction with integrated power supply
unit, for rail mounting
Auxiliary power
Connection
to thermocouple
Reference temperature
Connecting to the comparison point (Order No. M72166-xxx00)
If all thermocouples connected to the inputs of the module have the same
comparison point, you compensate as follows:
Compensating leads
(same material as
thermocouple)
Thermoco
uples
Auxiliary power
The terminals for the
compensating wire
must be short-
circuited!
Figure 4-25
Connection of Thermocouples with Comparison Point (Order No. M72166-xxx00) to an
Isolated AI
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
220 VAC
110 VAC
24 VAC
24 VDC
Fe-CuNi
Fe/Cu Ni
Ni Cr/Ni
Pt 10% Rh/Pt
Pt 13% Rh/Pt
Cu/Cu Ni
Cu/Cu Ni
Copper
L+
wire
M
+
–
3
1
SIEMENS
M72166-
12
11
9
8
–
+
Output (Cu wires)
-VVVVV
M72166
Type L
Type J
Type K
Type S
Type R
Type U
Type T
0 _C
M+
M–
ADC
M+
M–
COMP
+
COMP
/M
–
ANA
Analog Modules
Order number
B1
B2
B3
B4
1
2
3
4
5
6
7
00
Backplane
bus
4-63
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