Wiring Example Of A Module And An Encoder - Mitsubishi MELSEC Q Series User Manual

4 SETUP AND PROCEDURE BEFORE STARTING THE OPERATION

4.4.2 Wiring example of a module and an encoder

Phase A
Phase B
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(1) Wiring example with an open collector output type encoder (24 V DC)
QD62,QD62E
24 V
A20 (A13)
12 V
B20(B13)
5 V
A19(A12)
ABCOM
B19(B12)
24 V
A18(A11)
12 V
B18(B11)
5 V
A17(A10)
24 V DC
External
power
supply
0 V
The number inside the ( ) indicates the terminal number for channel 2.
POINT
When wiring the QD62, QD62E, and the encoder, separate the power supply cable
and signal cable. The following diagram shows an example.
[Wiring example]
QD62(E) 24 V
Phase ABCOM
A
External
24 V DC
power
0 V
supply
[Incorrect wiring example]
QD62(E) 24 V
Phase ABCOM
A
External
24 V DC
power
0 V
supply
Shielded twisted pair cable
Shield
Shielded twisted pair cable
Shield
OUT
+24 V
Encoder
0 V
E
OUT
+24 V
0 V
E
MELSEC-Q
Encoder
OUT
+24 V
E
OUT
+24 V
E
+24 V
0 V
The current flows
through the shielded
twisted pair cables in
Encoder
the same direction, so
there is no cancelling
effect.
This makes it more
prone to electromagnetic
induction.
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