I/O Circuits - YASKAWA SGD7S-****20A Series Product Manual

4.5.4

I/O Circuits

Sequence Input Circuits
 Photocoupler Input Circuits
This section describes CN1 connector terminals 6 to 13.
Examples for Relay Circuits
24 VDC
Note: The 24-VDC external power supply capacity must be 50 mA minimum.
The SERVOPACK input circuits use bidirectional photocouplers. Select either a sink circuit or
source circuit according to the specifications required by the machine.
Note: The connection examples in 4.5.3 I/O Signal Wiring Examples on page 4-37 are for sink circuit connections.
24 V
−
+
witch
witch
Photocoupler
ON
OFF
ERVOPACK
Ω
4.7 k
+24VIN
E.g., /DEC
Sink Circuits
ERVOPACK input ide
Photocoupler
Photocoupler
Input Signal Polarity
Internal Signal Level
Low level
High level
Examples for Open-Collector Circuits
24 VDC
24 V
−
+
Internal
ignal
witch
level
Internal
ignal
witch
level
Input Signal Polarity
Photocoupler
ON
OFF
4.5 I/O Signal Connections

4.5.4 I/O Circuits

ERVOPACK
Ω
4.7 k
+24VIN
E.g., /DEC
Source Circuits
ERVOPACK input ide
Photocoupler
Internal
ignal
level
Photocoupler
Internal
ignal
level
Internal Signal Level
Low level
High level
4
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