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MELSEC-A
4 SETUP AND PREPARATION BEFORE OPERATION
4.8.2 Module connection example
V+
I+
COM
SLD
V+
I+
COM
SLD
FG1
CH1
+15V
-15V
GND
*4
*1 Shield
*5
*3
CH4
*2
AG
For voltage input
For current input
Signal source 0 to ±10 V
Signal source 0 to ±20mA
*1 Shield
500k
500k
500k
500k
250
250
*1 Use a two-core twisted shield line for the power cable.
*2 Indicates the AJ65SBT-64AD input resistor.
*3 For the current input, be sure to connect the (V+) and (I+) terminals.
*4 When noise or ripple occurs with the external cable, connect a condenser with
about 0.1 to 0.47µF (25V or higher voltage-resistant product) between the terminal
V and COM.
*5 Always perform grounding for FG1. When there is a lot of noise, it may be better
ground AG as well.
If the grounding wiring (grounding yes/no) is changed after the offset and gain are
set, perform the setting of the offset/gain values again.
POINT
A/D conversion values are fluctuated by self-heating within approx. 30 minutes after
power is turned ON.
4.9 Maintenance and Inspection
There are no special inspection items for the AJ65SBT-64AD module, but follow the
inspections items describes in the PLC CPU User's Manual so that the system can
always be used in the best condition.