I/O Circuits - YASKAWA SigmaLogic7 Compact Hardware Manual

4.5 I/O Circuits

4.5.1 Digital 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 bi-directional photocouplers.
Select either a sink circuit or source circuit according to the
specifications required by the machine.
Note: The connection examples in 4.4 I/O Signal Wiring Examples are for sink
circuit connections.
24 V
+
Photocoupler
SERVOPACK
Ω
4.7 k
+24VIN
e.g., /DEC
Sink Circuits
−
SERVOPACK input side
Photocoupler
Switch
Photocoupler
Switch
Input Signal Polarity
Internal Signal
Level
ON Low level
OFF High level
Examples for Open-Collector
24 VDC
24 V
−
+
Internal
signal
level
Internal
signal
level
Input Signal Polarity
Photocoupler
ON
OFF
4 Inputs and Outputs
4.5.1 Digital Input Circuits
Circuits
SERVOPACK
Ω
4.7 k
+24VIN
e.g., /DEC
Source Circuits
SERVOPACK input side
Photocoupler
Switch
Photocoupler
Switch
Internal Signal
Level
Low level
High level
Internal
signal
level
Internal
signal
level
29