Priniples of analog value processing
4.6 Wiring thermocouples
S7-300 Automation System Module data
4-18 Manual, 08/2006, A5E00105505-04
Recommended compensating box
We recommend the use of a SIEMENS reference junction with integrated power supply unit
as a compensating box. The table below shows the relevant ordering data.
Table 4-2 Ordering data of the reference junction
Recommended compensating box Order number
Reference junction with integrated power supply unit, for rail mounting
Auxiliary power 220 VAC
24 VAC
24 VDC
110 VAC
Wiring to thermocouple
Fe-CuNi
Fe/Cu Ni
Ni Cr/Ni
Pt 10% Rh/Pt
Pt 13% Rh/Pt
Cu/Cu Ni
Cu/Cu Ni
Type L
Type J
Type K
Type S
Type R
Type U
Type T
Reference temperature 0 °C
M72166-xxx00
B1
B2
B3
B4
1
2
3
4
5
6
7
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