Mitsubishi Electric MELSEC-L Series LD40PD01 - Page 55

6 INSTALLATION AND EXTERNAL WIRING
6.4 Example of External Wiring Between the Flexible High-speed I/O Control Module and an Encoder
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• For the wiring between the flexible high-speed I/O control module and an encoder, separate the power
supply cables and signal wires.
• Do not wire the module and an encoder as shown in the figure below. Because a current flows through a
shielded twisted pair cable in a single direction and the canceling effect disappears, the module is easy to
be affected by electromagnetic induction.
24V
COM
0V
OUT
+24V
0V
E
Shielded twisted pair cable
Pulse input
Flexible high-speed
I/O control module
External
power
supply
24VDC
Encoder
24V
COM
0V
OUT
+24V
0V
E
Shielded twisted pair cable
Pulse input
Flexible high-speed
I/O control module
External power
supply
24VDC
Encoder