3.2 I/O Signal Connections
3.2.3 I/O Circuits
3-9
3
Wiring and Connecting
S
ER
VOP
ACK
s
This section describes CN1 connector terminals 40 to 47. The circuits are connected through
relay or open-collector transistor circuits. If you connect through a relay, use a low-current
relay. If you do not use a low-current relay, a faulty contact may result.
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.
Sequence Output Circuits
Refer to the following manual for details on sequence circuit outputs.
Σ
-7-Series
Σ
-7S SERVOPACK with Analog Voltage/Pulse Train References Product Manual (Manual No.: SIEP
S800001 26)
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., /
S
-ON
S
ERVOPACK
24 VDC
+24VIN
S_Analog
24 VDC
4.7 k
Ω
E.g., /
S
-ON
S
ERVOPACK
+24VIN
S_Analog
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