Specifications

Chapter 4 Installing HA-655 driver
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◆ Power OFF sequence
◆ Switch for main power operation
Plan the sequence circuit to operate the switch for main power individually by [alarm] signal and
[emergency stop] signal.
◆ Notices for switching main power
Since the HA-655 driver provides a capacitor for an input filter of a rectifier circuit, large transient current
flows at every operation of main power switch. If the switching operation is too frequent, resisters for
suppressing the transient current may deteriorate.
The switching frequency should not exceed 5 times in an hour and 30 times in a day. Furthermore, the
interval between turning OFF and ON should keep more than 30 seconds.
Do not make switching operation (turning ON or OFF) at the state that the servo-ON [CN2-3:S-ON] is
ON.
Min.0ms
Max.20ms
Min.20ms
Min.0ms
ON
ON
OFF
OFF
Not acceptable
Servo
-
ON
Input
OFF
Al
arm
Reset
Main power
Alarm
Servo-ON
Commands Output
Output
Input
ON
⇒
OFF
ON
⇒
OFF
Power for control