6 INSTALLATION AND WIRING
6.3 External Wiring
39
6
Heating-cooling control
*1 Use the shielded compensation lead wire.
*2 Use the shielded cable.
Use the compensation lead wire for the cable of a thermocouple. The shielded cable cannot be used. If the
compensation lead wire is not used, and when the cold junction temperature compensation resistor (1) is
away from the end tip (2) of a thermocouple, the (ambient) temperature (3) difference may lead to a faulty
temperature process value (PV).
L1C
CH1+
CH1-
CH2+
CH2-
*1
*1
*2
*2
L2H
COM-
*2
L2C
L1H
*2
R60TCTRT2TT2
Heating
Filter
Filter
Controlled
object
Internal
circuit
Internal
circuit
Internal
circuit
24VDC
Internal
circuit
Internal
circuit
Cooling
R60TCTRT2TT2(BW)
(1)
(3)
(2)
Summary of Contents for MELSEC iQ-R series
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Page 52: ...50 6 INSTALLATION AND WIRING 6 5 Unused Channel Setting MEMO ...
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