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MELSEC-Q
4 SETUP AND PROCEDURES BEFORE OPERATION
4.4.2 External wiring
(1) Q64AD
GND
1 Shielded
V +
I +
V –
SLD
+ 15 V
– 15 V
5
A.G.
FG
4
ANALOG GND
250
2
GND
500 k
1 Shielded
2
3
+ 15 V
– 15 V
500 k
500 k
V +
I +
V –
SLD
500 k
(a) For voltage input
Signal source 0 to ± 10 V
(b) For current input
Signal source 0 to ± 20 mA
1 Use a twisted two core shielded wire for the power wire.
2 Shows input resistance of Q64AD.
3 If current input, always connect to (V +) and (I +) terminals.
4 "A.G." terminal does not normally require wiring. However, it can be used as GND
for compatible equipment ground under the following conditions.
(1) When there is a difference in polarity between "A.G" and "GND for compatible
equipment".
(2) As an alternative for 0 V input when only the + side is open on a ± wire.
5 Always use a ground. In addition, ground the FB of the power supply module.