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3 SPECIFICATIONS AND FUNCTIONS
3.4.4 Input/output interface internal circuit
External wiring
When upper limit
switch is not used
When lower limit
switch is not used
2
24VDC
5V
A
5VDC
B
0V
Manual pulse
generator
(MR-HDP01)
1: The symbols in Need for wiring column indicate the following meanings:
•
: Wiring is necessary for positioning.
•
: Wiring is necessary depending on the situation.
2: Either polarity can be connected to the common (COM).
The outline diagrams of the internal circuits for the QD75P1/QD75D1 external device
connection interface are shown below.
(1) Input (Common to QD75P1 and QD75D1)
Pin No.
Internal circuit
1A3
1A1
1A2
1A4
1A5
1A6
1A7
(+)
1A19
(–)
1B19
(+)
1A20
(–)
1B20
1A11
1A12
1A8
1A9
1A10
Signal name
Near-point dog signal
Upper limit signal
Lower limit signal
Stop signal
External command
signal
Common
Manual pulse generator
A phase
Manual pulse generator
B phase
Drive unit READY
Drive unit READY
common
Zero signal
Zero signal common
3 - 22
MELSEC-Q
Need for wiring
1
DOG
FLS
RLS
STOP
CHG
COM
PULSER A+
PULSER A–
PULSER B+
PULSER B–
READY
RDY COM
PG024
PG05
PG0 COM
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Troubleshooting
