5 WIRING
5.2 External Wiring
27
5
If the cold junction compensation resistor (RTD) and the reference junction of the thermocouple (or the
reference junction of the compensation lead wire) are not connected to the same place (relay terminal block),
the (ambient) temperature difference may lead to a faulty measured temperature value. In addition, if an
incorrect wire is connected between A and B or B and C (case 1 or case 2 below), the (ambient) temperature
difference may lead to a faulty measured temperature value.
• Case 1 (a cable is connected between the reference junction of the thermocouple and the relay terminal
block)
• Case 2 (a compensation lead wire is connected between the relay terminal block and the thermocouple
input module)
A
B
RTD
Reference junction
Compensation lead wire (OK)
Cable (NG)
Cable
(Ambient) temperature difference
Relay terminal
block
Thermocouple input module
A: Reference junction of the thermocouple
B: Cold junction compensation resistor (RTD)
C
B
RTD
Reference junction
Cable (OK)
Compensation lead wire
(NG)
Compensation lead wire
(Ambient) temperature difference
Relay terminal
block
Thermocouple input module
B: Cold junction compensation resistor (RTD)
C: Reference junction of the compensation lead wire
Summary of Contents for R60RD8-G
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Page 14: ...12 MEMO ...
Page 18: ...16 1 PART NAMES MEMO ...
Page 24: ...22 4 PROCEDURES BEFORE OPERATION MEMO ...
Page 41: ...7 OFFSET GAIN SETTING 7 1 Setting Procedure 39 7 13 Click Yes button ...
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