Functions of the IM 151/CPU
5-18
ET 200S Interface Module IM 151/CPU
A5E00058783-01
5.8 Parameterization of the Reference Junction for the
Connection of Thermocouples
If you want to use the IM 515/CPU in an ET 200S system with thermocouples and
reference junctions, set the following parameters in the hardware configuration:
Table 5-13 Parameterization of the Reference Junction
CPU Module Parameter
Range Explanation
Activation of reference
junctions 1 to 8
Activated/not activated
Example, see
Figure 5-4
You can enable the reference junction with this
parameter. Only then can you continue to
parameterize the reference junction.
Module number of reference
junction 1 to module number of
reference junction 8
The module number
corresponds to the slot.
None/5 to 66
Example, see
Figure 5-4
You can use this parameter to assign the RTD
module slot to the corresponding reference
junction.
Channel number of reference
junction 1 to channel number
of reference junction 8
RTD on channel 0
RTD on channel 1
Example, see
Figure 5-4
You can use this parameter to define the
channel (0/1) for reference temperature
measurement (determining the compensation
value) for the assigned RTD module slot.
RTD Module Parameter Range Explanation
Measurement
type/measurement range
Resistance/tempera-
ture measurement,
e.g.
RTD-4L Pt 100
standard range
If you use a channel of the RTD module for
reference junction parameterization, you must
parameterize the measurement
type/measurement range for this channel as
RTD-4L Pt 100 climatic range
.
TC Module Parameter Range Explanation
Reference junction number 1 to 8 You can use this parameter to indicate the
reference junction (1 to 8) that contains the
reference temperature (compensation value).
Reference junction channel 0
and reference junction
channel 1
None, RTD You can enable the use of the reference
junction with this parameter.
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