Mitsubishi Electric FR-A700 Series, Technical Manual

Page: 72 / 550

65
1
S
PECIFI
C
A
T
IONS
SPECIFICATIONS
(2) Sink logic type and source logic type
In sink logic, a signal switches ON when a current
flows from the corresponding signal input terminal.
Terminal SE is common to the open collector output
signals.
In source logic, a signal switches ON when a current
flows into the corresponding signal input terminal.
Terminal SE is common to the open collector output
signals.
(3) Relay output (fault output)
1changeover contact is used for fault alarm output
and the following table shows its operations.
When a fault occurs in , ALARM lamp
is lit, and fault output remains lit. If the contact is
opened by the magnetic contactor, etc. provided on
the inverter power supply side, the inverter control
power is lost and the fault output is not kept ON. To
keep the fault output signal ON, the fault alarm output
contact (across terminals B-C) must be kept open by
the external circuit.
In , fault output signal can be kept ON
by using terminal R1/L11, S1/L21 to connect the
control circuit to the other power supply. (Refer to
page 36)
Note that even if current limit function, stall
prevention, fan fault, brake discharge resistor
overheat protection function operates, or fault alarm
output is not activated and terminal B-C remains
closed. In addition, ALARM lamp is not lit.
Fault description when a fault occurs can be read in
fault history in monitor mode of the operation panel or
parameter unit.
Open/close of fault alarm relay and lamp indication
common
Current flow concerning the input/output signal
when sink logic is selected
+
-
DC input (sink type)
<Example: QX40>
Inverter
24VDC
RUN
SE
TB1
TB17
R
R
Current flow
Current flow concerning the input/output signal
when source logic is selected
DC input (source type)
<Example: QX80>
24VDC
RUN
SE
TB1
TB18
R
Inverter
R
Current flow
+
-
Open/Close
of Contact
ALARM
Lamp
Terminal
During normal
operation and the
inverter power-
OFF
The relay coli is non-
excitation and NO
contact is closed.
Off
Abnormal
When a fault occurs,
the coil of the relay is
excited to open NO
contact and close
NC contact.
Note that the
protective function is
not activated at the
time of a fan alarm.
On
common
A700 F700
A700 F700
A700
F700
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$
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