Mitsubishi Electric QD62D - Wiring Example of a Module and an Encoder

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MELSEC-Q
4 SETUP AND PROCEDURE BEFORE STARTING THE OPERATION
4.4.2 Wiring example of a module and an encoder
(1) Wiring example with an open collector output type encoder (24 V DC)
A20 (A13)
24 V
B20(B13)
12 V
A19(A12)
5 V
B19(B12)
ABCOM
Phase A
Shield
Shielded twisted pair cable
OUT
E
+24 V
EncoderQD62,QD62E
A18(A11)
24 V
B18(B11)
12 V
A17(A10)
5 V
Phase B
OUT
E
+24 V
0 V
+24 V
0 V
24 V DC
External
power
supply
Shielded twisted pair cable
Shield
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]
24 V
ABCOMPhase
A
QD62(E)
OUT
0 V
24 V DC
External
power
supply
Encoder
+24 V
0 V
E
[Incorrect wiring example]
OUT
Encoder
+24 V
0 V
E
24 V
ABCOMPhase
A
QD62(E)
0 V
24 V DC
External
power
supply
The current flows
through the shielded
twisted pair cables in
the same direction, so
there is no cancelling
effect.
This makes it more
prone to electromagnetic
induction.