Sequence Input Circuit - YASKAWA SGDV SERVOPACK User Manual

3 Wiring and Connection

3.4.2 Sequence Input Circuit

3.4.2 Sequence Input Circuit

(1) Photocoupler Input Circuit
CN1 connector terminals 40 to 47 are explained below.
The sequence input circuit interface is connected through a relay or open-collector transistor circuit. When
connecting through a relay, use a low-current relay. If a low-current relay is not used, a faulty contact may
result.
Note: The 24 VDC external power supply capacity must be 50 mA minimum.
For SEN input signal circuit, refer to 5.9.1 Absolute Data Request Signal (SEN).
The SERVOPACK's input circuit uses bidirectional photocoupler. Select either the sink circuit or the source
circuit according to the specifications required for each machine.
Note: 
• The ON/OFF polarity differs between when a sink circuit is connected and when a source circuit is connected.
Signal
ON
OFF
3-32
Relay Circuit Example
SERVOPACK
3.3 kΩ
24 VDC
+24 VIN
/S-ON, etc.
The connection examples in 3.2.3 to 3.2.5 show sink circuits.
Sink Circuit
24 V
− SERVOPACK input
+
Input Signal Polarities
Voltage
Level
Level
Low (L)
0 V
level
High (H)
24 V
level
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Open-collector Circuit Example
24 VDC
24 V
−
+
Contact Signal
Close ON
Open OFF
SERVOPACK
3.3 kΩ
+24 VIN
/S-ON, etc.

Source Circuit
SERVOPACK input
Input Signal Polarities
Voltage
Level
Level
High (H)
24 V
level
Low (L)
0 V
level
Contact
Close
Open