4.5 I/O Signal Connections
4.5.4 I/O Circuits
4-46
Sequence Output Circuits
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.
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 Output Circuits
Photocoupler output circuits are used for the ALM (Servo Alarm), /S-RDY (Servo Ready), and
other sequence output signals. Connect a photocoupler output circuit to a relay or line-receiver
circuit.
Note: The maximum allowable voltage and current range for photocoupler output circuits are as follows:
• Maximum allowable voltage: 30 VDC
• Current range: 5 mA to 50 mA DC
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.
This could damage the machine or cause an accident that may result in death or injury.
Example for Photocoupler Circuit Example for Relay Circuit
Example for Line Receiver Circuit
Example for Relay Circuit Example for Line-Receiver Circuit
5 VDC to 30 VDC
Photocoupler
0V
0V
SERVOPACK
0V
Relay
5 VDC to 30 VDC
SERVOPACK
5 VDC to 30 VDC
0V
SERVOPACK
0V
Relay
5 VDC to 30 VDC
SERVOPACK
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