YASKAWA E-7-Series SGD7S Product Manual page 108

Sink Circuits
24 V
−
SERVOPACK input side
+
Switch
Switch
Input Signal Polarity
Photocoupler
ON
OFF
Sequence Output Circuits
Incorrect wiring or incorrect voltage application to the output circuits may cause short-circuit fail-
ures.
If a short-circuit failure occurs as a result of any of these causes, the holding brake will not work.
Important
This could damage the machine or cause an accident that may result in death or injury.
 Open-Collector Output Circuits
This section describes CN1 connector terminals 37 to 39 (Alarm Code Output).
The Alarm Code (ALO1, ALO2, and ALO3) signals are output from open-collector transistor
output circuits. Connect an open-collector output circuit to a photocoupler, relay, or line-
receiver circuit.
Example for Photocoupler Circuit
5 VDC to 30 VDC
SERVOPACK
0 V
Example for Line Receiver Circuit
SERVOPACK
0 V
Note: The maximum allowable voltage and maximum allowable current for open-collector output circuits are as fol-
lows:
• Maximum allowable voltage: 30 VDC
• Maximum allowable current: 20 mA DC
Photocoupler
Internal
signal
level
Photocoupler
Internal
signal
level
Internal Signal Level
Low level
High level
Photocoupler
0 V
5 VDC to 30 VDC
4.5 I/O Signal Connections
Source Circuits
24 V
−
SERVOPACK input side
+
Photocoupler
Switch
Photocoupler
Switch
Input Signal Polarity
Photocoupler Internal Signal Level
ON
OFF
Example for Relay Circuit
SERVOPACK
5 VDC to 30 VDC
0 V
4.5.4 I/O Circuits
Internal
signal
level
Internal
signal
level
Low level
High level
4
Relay
4-39