GDB-5K50
Instructions Manual
(5) Overheat alarm signal output, overheat alarm LED(O.H.A) and overheat control(O.H.C)
Overheating may cause fire.
Stop operation upon output of this signal.
Overheating may cause fire.
Stop operation when this LED comes on.
① Output current
a. I
C
≦6mA, V
CE(sat)
<2V
b. I
C
≦2mA, V
CE(sat)
≦0.6V
V
CEO
≦30V
● Use overheat alarm signal output(O.H.A)without fail.
● In case of internal temperature of the driver reaches approx. 70℃ or more,
the signal is output(photo-coupler ON) and O.H.A LED comes on.
At this time the motor output current is not blocked.
● When this signal is output, stop operation and check if there is any
abnormality occurring with the motor and the driver.
● Provide mechanical cooling, for example, if this signal is output while
no abnormality is detected.
● Continuous operation is possible unless this signal is output.
● When the internal temperature reaches approximately 75℃ or more, the output
current decreases due to overheat control (O.H.C) and overheating is prevented.
Even if it becomes the O.H.C, the output current will not drop below 1.2A/phase.
9
10
O.H.A+
O.H.A-
DRIVER
(J1)
Photo-coupler
WARNING
WARNING
70
75
80
60
internal temperature of the driver
65
℃
O.H.C prevents overheating
O.H.A signal is output
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