14.02-9
2100-A
16
Input Connection Diagram for RTD Inputs.
Voltage Free
Contact
Voltage Free
Contact
A
B
Channel 1
B
A
B
Channel 2
B
A
B
Channel 3
B
A
B
Channel 4
B
A
B
Channel 5
B
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3-Wire Field RTD
Internally
connected
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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Input Connection Diagram for Thermocouple (T/C) Inputs.
+
Channel 1
-
+
Channel 2
-
+
Channel 3
-
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Field
Thermocouples
1
2
4
5
7
8
2-Wire Field RTD
3-Wire Field RTD
Note 1.
All T/C inputs are differential. Exceeding 18V peak between
any 2 inputs, or any single input will cause errors on ALL channels.
Note 2.
It is recommended that the T/C’s be isolated from each other
and earth. Isolated junction, mineral insulated T/C’s are recommended.
Note 3.
For accurate T/C measurement, especially low temp: *The
cover must be fitted. *Avoid drafts and temperature differences across
terminals. *Once installation is complete, close the cabinet door and allow
the cabinet to reach equilibrium. This may take several hours. *Place all
the T/C probes into a calibrated thermal bath at temperature of interest.
Any errors can be zeroed out in software.
Note 4.
All T/C’s are referenced to the on board cold junction
compensation (CJC) temperature sensor. Prior to Rev 1.3 the CJC sensor
is located behind terminal 24. From Rev 1.3 onwards the CJC temperature
sensor is located behind terminal 1. Alternatively one of inputs 1 to 8 can
be selected in the Scada software as an RTD CJC for inputs 1 to 8,
and one of inputs 9 to 16 can be selected in the Scada software as an
RTD CJC for inputs 9 to 16.The mounting orientation of the 2100-A16,
(eg vertical or horizontal) affects the CJC accuracy of different inputs.
The affects are more noticeable on small temperature ranges. For
example mounting the 2100-A16 horizontal will cause the all the upper
terminals to be warmer compared to all the the lower terminals. Any
errors can be zeroed out in software.
Note 5. Cables must be screened & screens earthed at one end only.
Note 1.
All RTD inputs are single ended. ie all the
2nd ‘B’ terminals are internally connected.
Note 2.
It is recommended that the RTDs be isolated
from each other and earth.
Note 3.
Inputs can be used as digital inputs for
sensing a clean, voltage free, field contact.
Note 4.
All RTD cables must be screened, and the
screens earthed at one end only. All the three
wires must be the same resistance. (ie. the
same type and size.) Refer to ‘Wiring and
Installation’ for recommended types.
Note 5.
To minimise lead resistance errors, 3 wire
RTDs should be used. If 2 wire RTDs are
used small offset errors can be compensated
for in software.
Note 6.
For voltage free contacts use RTD6 0 to 850
for pseudo digital input in the Scada Software.
* Refer to Wiring & Installation.
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Input Connection Diagram Thermocouple Upscale (US) / Downscale (DS) Drive.
To achieve US or DS drive on T/C open circuit resistors must be fitted externally, as shown below.
UPSCALE
DOWNSCALE
+
20Vdc
-
+
Channel 1
-
+
Channel 2
-
+
Channel 3
-
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Field
Thermocouples
49
48
1
2
4
5
7
8
3k3
220
10M
10M
10M
+
20Vdc
-
+
Channel 1
-
+
Channel 2
-
+
Channel 3
-
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Field
Thermocouples
3k3
220
10M
10M
10M
49
48
1
2
4
5
7
8
For US drive: Fit 10M resistors to +ve terminals.
For DS drive: Fit 10M resistors to -ve terminals.
Refer to Wiring and Installation.
Refer to Wiring and Installation.
