External Wiring Examples - Mitsubishi Electric MELSEC iQ-R R60TD8-G User Manual

External wiring examples

This section shows the examples of external wiring.
Thermocouple input module
Follow the procedure below for wiring.
1.
Install a relay terminal block.
2.
Connect thermocouples and compensation lead wires to the relay terminal block.
3.
When With cold junction compensation (0) is set to 'Cold junction compensation with/without setting' (Un\G298), connect
the provided cold junction compensation resistor (RTD) to the relay terminal block.
4.
Wire the relay terminal block to a thermocouple input module using an external device connector.
Compensation
*2
lead wire
*3 RTD
*4
*1 Use a shielded cable and ground the shields. Do not use a compensation lead wire.
*2 Use a shielded compensation lead wire and ground the shield. Do not use a cable.
*3 Connect the cold junction compensation resistor (RTD) when With cold junction compensation (0) is set to 'Cold junction compensation
with/without setting' (Un\G298).
*4 When connect the cold junction compensation resistor (RTD), connect the terminal of RTD- to the terminal of RTDG.
5 WIRING
26
5.2 External Wiring
Relay
terminal block
CH1
+
-
CH8
+
-
RTD
+
-
G
External device
connector
*1
Cable
Thermocouple input module
CH1
A1
+ A/D
conversion
B1
-
circuit
CH8
A15
+ A/D
conversion
B15
- circuit
RTD
B19
+
B20
A/D
-
conversion
A20
circuit
G