15
Type of thermocouple
Constituent materials
Classification by
application and
tolerance
Compensating conductor
Symbol
– conductor
+ conductor
Classification by
application and
tolerance
Previous
symbol
(reference)
Symbol
Previous
symbol
(reference)
T
CC
TX-G
WCC-G
General-purpose,
standard class
Copper
Alloy with copper
or nickel as major
tit
t
TX-GS
---
General-purpose,
precision class
j
constituent
TX-H
WCC-H
Heat-resistant,
standard class
TX-HS
---
Heat-resistant,
precision class
Connect a platinum resistance thermometer with copper wire. All three leads
should have the same thickness and the same length to give them identical re-
sistances. Do not branch the two (B) leads near the terminal block as this in-
creases measurement errors.
Current Transformer
Use an E54-CT1 or E54-CT3 Current Transformer (CT). Refer to
Appendix C
Heater Burnout Detection for details of the Current Transformer specifications
and installation dimensions.
2-3-2 Output Wiring
Connection Diagrams
C200H-TC
j
01 Transistor Output
OUT1
OUT2
NC
10
9
2
1
NC
NC
NC
2
1
NC
NC
COM
24 VDC
24 VDC
A
B
COM
24 VDC
NC: Not connected
The pairs of terminals B2 to A2 and B1 to A1 are shorted internally. Always sup-
ply power to the 24-VDC terminal (B1) as this drives the internal circuits.
C200H-TC
j
02/TC
j
03 Voltage/Current Output
NC
NC
10
10
9
9
NC
NC
OUT1 (+)
OUT2 (+)
OUT1 (–)
OUT2 (–)
A
B
Wiring Platinum Resistance
Thermometers
Wiring
Section 2-3
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