Analog Electronic Modules
12-24
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Configuring the reference junction with 2AI TC and interface module
You can set the reference junctions for the 2AI TC electronics modules using the
following parameters:
Table 12-26 Reference J unction Parameters
Parameters
Module Value range Description
Reference junction slot IM 151 none, 2 to 12
(IM151-1 BASIC)
none, 2 to 63
(IM151-1 HIGH
FEATURE)
IM 151-1 STANDARD
IM 151-1FO
STANDARD
With this parameter, you can
assign a slot (none, 2 to 12 or 2
to 63) on which the channels for
reference temperature
measurement are situated
(calculating the compensation
value).
Reference junction
input
IM 151 RTD on c hannel 0
RTD on channel 1
With this parameter you specify
the channel (0/1) for reference
temperature measurement
(calculating the compensation
value) for the relevant slot.
Reference junction E0
and reference junction
E1
2AI TC none, RTD With these parameters, you c an
enable the use of the reference
junction.
Reference junction
number
2AI TC 1 With this parameter, you assign
the reference junction (1)
containing the reference
temperature (compensation
value).
Example of the Configuration of Reference Junctions
• Structure: To simplify the situation, the following figure 12-4 shows only RTD
and TC modules:
2AI RTD
E0
E1
2AI TC
E0
E1
2AI TC
E0
E1
2AI TC
E0
E1
35811Slot
... ... ... ... ...
Reference
junction
Compensation via 2AI RTD modules
Example
Figure 12-4 Example of the Configuration of Reference J unctions
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