Sequence Input Circuit - YASKAWA E-V-MD Series User Manual

5 Wiring and Connections

5.2.4 Sequence Input Circuit

5.2.4

Sequence Input Circuit

(1) Photocoupler Input Circuit
CN1 connector pin 2 is described 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.
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 1. The connection examples in 5.2.3 Example of I/O Signal Connections use sinking circuits.
2. The ON/OFF polarity differs between when a sink circuit is connected and when a source circuit is connected.
Signal
ON
OFF
5-14
Relay Circuit Example
SERVOPACK
4.7 kΩ
24 VDC
+24 VIN
For example, /EXT
Sink Circuit
24 V
−
SERVOPACK input
+
Input Signal Polarities
Voltage
Level
Level
Low (L)
0 V
level
High (H)
24 V
level
Open-collector Circuit Example
24 VDC
24 V
−
+
Contact Signal
Close ON
Open OFF
SERVOPACK
4.7 kΩ
+24 VIN
For example, /EXT
Source Circuit
SERVOPACK input
Input Signal Polarities
Voltage
Level
Level
High (H)
24 V
level
Low (L)
0 V
level
Contact
Close
Open