Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 534

• When switching between inverter operation and commercial power supply operation, commercial power supply may be
accidentally applied to the output side of the inverter. To avoid such situation, provide an interlock where the magnetic
contactor at the commercial power supply side turns ON at turn OFF of the magnetic contactor at the inverter output side.
The inverter's electronic bypass sequence that outputs timing signals for the magnetic contactors can act as a complicated
interlock between the commercial power supply operation and the inverter operation.
NOTE
• The commercial power supply operation is not available with Mitsubishi Electric Vector control dedicated motors (SF-V5RU).
 Connection diagram
• A typical connection diagram of the electronic bypass sequence is shown below.
MC1
MCCB
R/L1
S/L2
T/L3
R1/L11
S1/L21
Inverter start
(forward rotation)
STF
Inverter/bypass
CS
operation interlock
MRS
∗3
External thermal
OH
Reset
RES
SD
10
Frequency
2
setting signal
5
Standard models and IP55 compatible models
MC1
MCCB
External
thermal
Reset
*1 Be careful of the capacity of the sequence output terminals.
The applied terminals differ by the settings of Pr.190 to Pr.196 (Output terminal function selection).
Output terminal capacity
Open collector output of inverter (RUN, SU, IPF, OL, FU)
Inverter relay output (A1-C1, B1-C1, A2-B2, B2-C2)
Relay output option (FR-A8AR)
*2 When connecting a DC power supply, insert a protective diode.
When connecting an AC power supply, use the relay output option (FR-A8AR), and use contact outputs.
*3 The applied terminals differ by the settings of Pr.180 to Pr.189 (Input terminal function selection)
*4 To use the signal, assign the function to the output terminal Pr.190 to Pr.195 (Output terminal function selection) of the converter unit. Always
set the negative logic for the ALM signal.
MC2
External
thermal relay
MC3
U
V
W
MC1
∗1
MC1
MC2
MC3
∗1
MC2
MC3
MC2
∗1
MC3
SE
Converter unit
R/L1 P/+
S/L2 N/-
Inverter start
T/L3
(forward rotation)
R1/L11
Inverter/bypass
S1/L21
operation interlock
SE
RDA
∗4
ALM
OH
∗4
Y214
RES
RSO
SD
Frequency
setting signal
Separated converter type
IM
∗2
24VDC
Inverter
P/+
N/-
STF
CS
∗3
MRS
SD
X10
∗3
X95
∗3
X96
RES
10
2
5
R1/L11
S1/L21
Output terminal permissible load
24 VDC 0.1 A
230 VAC 0.3 A,
30 VDC 0.3 A
MC2
External
thermal relay
MC3
U
V IM
W
MC1
∗1
MC1
MC2
MC3
∗1
∗2
MC2
24VDC
MC3
MC2
∗1
MC3
SE
5. PARAMETERS
5.14 (A) Application parameters
1
2
3
4
5
6
7
8
9
10
533