Examples Of Connection To Host Controller; Sequence Input Circuit - YASKAWA SGDV series User Manual

3.5

Examples of Connection to Host Controller

This section shows examples of SERVOPACK I/O signal connection to the host controller.

3.5.1 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.
24 VDC
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: The connection example in 3.3.3 shows sink circuits.
•
• The ON/OFF polarity differs between when a sink circuit is connected and when a source circuit is connected.
24 V
−
+
Signal
ON
OFF
Relay Circuit Example
SERVOPACK
3.3 kΩ
+24 VIN
/SI1, etc.
Sink Circuit
SERVOPACK input
Input Signal Polarities
Voltage
Level Contact
Level
Low (L)
0 V
level
High (H)
24 V
level

3.5 Examples of Connection to Host Controller

Open-collector Circuit Example
24 VDC
24 V
−
+
Input Signal Polarities
Signal Level
High (H)
Close ON
level
Low (L)
Open OFF
level
SERVOPACK
3.3 kΩ
+24 VIN
/SI1, etc.
Source Circuit
SERVOPACK input
Voltage
Contact
Level
24 V Close
0 V Open
3
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