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MELSEC-Q
3 SPECIFICATIONS
3.1.3 Specifications for RTD connection
This section explains the specifications for connection of the Q64RD/Q64RD-G and
platinum temperature-measuring resistors.
(1) For 3-wire type
The wire resistance value should satisfy the condition of 1) + 2) 2 max.
In addition, the difference of the wire resistance value between 1) and 2) should
be 10 max.
Pt100
2)
1)
a1
A1
B1
b1
SLD
Q64RD/Q64RD-G
Wire
(2) For 4-wire type
The wire resistance value should satisfy the condition of 1) + 2) 2 max.
Pt100
2)
1)
a1
A1
B1
b1
SLD
Q64RD/Q64RD-G
Wire
POINT
Wire resistance values may be an error factor in the temperature measurement.
The error arisen between the Q64RD/Q64RD-G and the temperature-measuring
resistor (between the wire resistance value 1) + 2) and measured temperature
value) is Max. 0.007 /2 (Q64RD) or Max. 0.003 /2 (Q64RD-G).
This error can be corrected by the offset/gain setting.
When making offset/gain adjustment, set the wire resistance value actually used.
Summary of Contents for q64rd
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