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Sigma II User's Manual
5.5 Forming a Protective Sequence
This section describes the procedure for using I/O signals from the servo amplifier to
form a protective safety sequence.
5.5.1
Using Servo Alarm and Alarm Code Outputs
The basic procedure for connecting alarm output signals is described below.
Photocoupler output levels
per output node:
• Maximum operating
voltage: 30V
• Maximum output cur-
rent: 50mA
DC
Open-collector output
levels per output node:
• Maximum operating
voltage: 30V
• Maximum output cur-
rent: 20mA
A suitable external I/O power supply must be provided by the user separately
because there is no internal 24V power supply in the servo amplifier.
The use of the photocoupler output signals is described below.
Output ð ALM+ CN1-31
Output ð ALM- CN1-32
These alarms are output when a servo amplifier alarm is detected.
Form an external circuit so this alarm output (ALM) turns the servo amplifier OFF.
State
ON
OFF
Alarm codes ALO1, ALO2 and ALO3 are output to indicate each alarm type.
DC
DC
DC
Servo Alarm Output
Signal Ground for Servo Alarm Output
Servo amplifier
Alarm
detection
Circuit between CN1-31 and 32 is closed, and
CN1-31 is at low level.
Circuit between CN1-31 and 32 is open, and
CN1-31 is at high level.
Chapter 5: Parameter Settings and Functions
Servo amplifier
Photocoupler
CN1-3
ALM+
1
50mA max.
ALM-
CN1-32
ALO1
CN1-37
20mA max.
ALO2
CN1-38
ALO3
CN1-39
SG
CN1-1
0V
ALM output
Turns power OFF.
Status
5-69
I/O power supply
0V
+24V
0 V
Host controller
Speed/Torque Control,
Position Control
Speed/Torque Control,
Position Control
Result
Normal state.
Alarm state.
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