42
6 INSTALLATION AND WIRING
6.3 External Wiring
Heating-cooling control
*1 Use the shielded compensation lead wire.
*2 Use the shielded cable.
• To use the heater disconnection detection function, the CT input channel assignment must be set. Since the
CT1 is used in the loop of CH1 in the above wiring example, set "CH1" for "CT input channel assignment
setting" in the "CT setting" of CT1.
• 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).
R60TCTRT2TT2BW
(CT)
L1H
L1C
CH1+
CH1-
CH2+
CH2-
*1
*1
*2
*2
*2
*2
CT1
CT1
CT8
CT8
CT2
CT2
L2H
COM-
*2
L2C
Heating
Cooling
Filter
Filter
Controlled
object
Current
sensor
CT input circuit
Connector
Connector
Internal
circuit
Internal
circuit
Internal
circuit
24VDC
Internal
circuit
Internal
circuit
R60TCTRT2TT2(BW)
(1)
(3)
(2)
Содержание MELSEC iQ-R series
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