Wiring; Wiring Instructions; Module Connection Example; Inspection And Maintenance - Mitsubishi Electric MELSEC A Series Manual

4. PRE-OPERATION SETTINGS AND PROCEDURES
4.4

Wiring

4.4.1

Wiring instructions

4.4.2

Module connection example

4.5

Inspection and Maintenance

Take the following precautions to protect external wiring from noise:
(1) Separate the AC and DC wiring.
(2) Separate the main circuit and/or high voltage wiring from the control and signal
wiring.
(3) When applicable, ground the shielding of all wires to a common ground point.
(1) Voltage input
Signal source: 0 to ±10 V
(2) Current input
Signal source: 0 to ±20 mA
*1: For the cable, use a two-core twisted shielded wire.
*2: Indicates the input resistance of the A68ADN.
*3: For current input, make sure to connect the terminals (V+) and (I+).
*4: If noise or ripple is generated at the external wiring, connect a capacitor of
approximately 0.1 to 0.47 µF25WV between terminals V and COM.
*5: If there is excessive noise, ground the module. If any change has been
made in grounding method (ground/no ground) after offset/gain setting, redo
the setting.
The A68ADN module does not require special inspections after installation
However, to ensure that the system operates at its best, the module should be
checked following the instructions in the User's Manual for the particular PC CPU.
CH1
*4
V+
I+
COM
FG
CH8
V+
*3
COM
FG
*1 shield
ANALOG
GND
*5
4 − 5
MELSEC-A
500 KΩ
250 Ω
500 KΩ
GND
*2
500 KΩ
I+
500 KΩ
250 Ω
15V
15V