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4.5 I/O Signal Connections
4.5.4 I/O Circuits
4
W
iring and Connecting
S
ER
VOP
ACK
s
4-39
4.5.4
I/O Circuits
Sequence Input Circuits
Photocoupler Input Circuits
This section describes CN1 connector terminals 6 to 13.
Note: The 24-VDC external power supply capacity must be 50 mA minimum.
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.
Examples for Relay Circuits
Examples for Open-Collector Circuits
Sink Circuits
Source Circuits
Input Signal Polarity
Input Signal Polarity
Photocoupler
Internal Signal Level
Photocoupler
Internal Signal Level
ON
Low level
ON
Low level
OFF High
level OFF High
level
4.7 k
Ω
E.g., /DEC
S
ERVOPACK
24 VDC
+24VIN
24 VDC
4.7 k
Ω
E.g., /DEC
S
ERVOPACK
+24VIN
S
ERVOPACK input
s
ide
S
witch
Photocoupler
Internal
s
ignal
level
Internal
s
ignal
level
Photocoupler
S
witch
24 V
+
−
S
ERVOPACK input
s
ide
24 V
+
−
S
witch
Photocoupler
Internal
s
ignal
level
Internal
s
ignal
level
Photocoupler
S
witch