YASKAWA SGD7S Product Manual page 132

Sequence Input Circuits
 Photocoupler Input Circuits
This section describes CN1 connector terminals 40 to 47. The circuits are connected through
relay or open-collector transistor circuits. If you connect through a relay, use a low-current
relay. If you do not use a low-current relay, a faulty contact may result.
Examples for Relay Circuits
24 VDC
+24VIN
E.g., /S-ON
Note: The 24-VDC external power supply capacity must be 50 mA minimum.
Refer to the following section for the interface for the SEN signal input circuit.
Information
6.12.2 Structure of the Position Data of the Absolute Encoder on page 6-73
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.
Sink Circuits
24 V
−
SERVOPACK input side
+
Switch
Switch
Input Signal Polarity
Photocoupler
ON
OFF
SERVOPACK
Ω
4.7 k
Photocoupler
Internal
signal
level
Photocoupler
Internal
signal
level
Internal Signal Level
Low level
High level
4.5 I/O Signal Connections
Examples for Open-Collector Circuits
SERVOPACK
Ω
4.7 k
+24VIN
24 VDC
E.g., /S-ON
Source Circuits
24 V
−
SERVOPACK input side
+
Photocoupler
Switch
Photocoupler
Switch
Input Signal Polarity
Photocoupler Internal Signal Level
ON
OFF
4.5.4 I/O Circuits
Internal
signal
level
4
Internal
signal
level
Low level
High level
4-45