Mitsubishi Electric FR-A700 Technical Manual page 72

(2) Sink logic type and source logic type
common
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.
Current flow concerning the input/output signal
when sink logic is selected
Inverter
RUN
-
SE
24VDC
Current flow
Current flow concerning the input/output signal
when source logic is selected
Inverter
RUN
+
SE
24VDC
Current flow
DC input (sink type)
<Example: QX40>
TB1
R
R
+
TB17
DC input (source type)
<Example: QX80>
TB1
R
R
- TB18
(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
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
A700 F700
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
Open/Close
of Contact
During normal
The relay coli is non-
operation and the
excitation and NO
inverter power-
contact is closed.
OFF
When a fault occurs,
the coil of the relay is
excited to open NO
contact and close
Abnormal NC contact.
Note that the
protective function is
not activated at the
time of a fan alarm.
65
SPECIFICATIONS
common
, ALARM lamp
A700 F700
A700
F700 Terminal
ALARM
Lamp
Off
On
1