Mitsubishi Electric MELSEC iQ-R R60TD8-G - Page 30

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5 WIRING
5.2 External Wiring
RTD input module
Follow the procedure below for wiring.
1. Install a relay terminal block.
2. Connect resistance temperature detectors to the relay terminal block.
3. Wire the relay terminal block to a RTD input module using an external device connector.
*1 Use a shielded cable and ground the shields.
■Specifications when a resistance temperature detector is connected
When connecting a resistance temperature detector to the RTD input module, make sure that the conductor resistance values
of three wires satisfy the conditions below.
• Each conductor resistance of , , and  must be 350 or lower.
• The difference of conductor resistance values between  and  must be 10 or lower when Pt100, JPt100, or Ni100 is
used, 5 or lower when Pt50 is used.
CH1
A
B
b
CH8
A
B
b
CH1
A
B
b
CH8
A
B
b
A1
A2
B1
A19
B18
B19
Cable
*1
Cable
*1
Relay
terminal block
Cable
*1
External device
connector
RTD input module
A/D
conversion
circuit
A/D
conversion
circuit
A1
B1
b1
RTD
Ò
Ô
Ó
RTD input module