Mitsubishi Electric FR-A720-0.4K Instruction Manual page 363

(1) Connection diagram
⋅ The following shows the connection diagram of a typical electronic bypass sequence. Sink logic, Pr. 185 = "7", Pr.
192 = "17", Pr. 193 = "18", Pr. 194 = "19"
MCCB MC1
R/L1
S/L2
T/L3
R1/L11
S1/L21
Inverter start
(forward rotation)
STF
Inverter/bypass
CS
operation
MRS
interlock
*3
External
JOG(OH)
thermal reset
RES
SD
10
Frequency
2
setting signal
5
Electronic bypass sequence connection diagram
CAUTION
⋅ Use the bypass operation function in external operation mode. Be sure to connect the other power supply since the function is
not performed normally unless the connection terminals R1/L11, S1/L21 are not connected to the other power supply (power
supply that does not pass MC1).
⋅ Be sure to provide mechanical interlocks for MC2 and MC3.
⋅ Operations of magnetic contactors (MC1, MC2, MC3)
Magnetic
Contactor
Between power supply and
MC1
inverter input
MC2 Between power supply and motor
Between inverter output and
MC3
motor
MC2
External
thermal relay
MC3
U
V IM
W
*1
MC
(MC1)IPF
1
MC3
*1
MC
(MC2)OL *2
2
24VDC
MC2
*1
MC
(MC3)FU
3
SE
Installation Place
Bypass operation
Special operation and frequency control
*1 Take caution for the capacity of the sequence output terminal.
The used terminal changes depending on the setting of Pr. 190 to
Pr. 196 (output terminal function selection).
Output Terminal Capacity
Inverter open collector output
(RUN, SU, IPF, OL, FU)
Inverter relay output (A1-C1, B1-
C1, A2-B2, B2-C2)
Relay output option (FR-A7AR)
*2 When connecting a DC power supply, insert a protective diode.
When connecting an AC power supply, connect a relay output
option (FR-A7AR) and use a contact output.
*3 The used terminal changes depending on the setting of Pr. 180 to
Pr. 189 (input terminal function selection).
Operation ( : Shorted, ×: Open)
During inverter
operation
×
×
Output Terminal
Permissble Load
24VDC 0.1A
230VAC 0.3A
30VDC 0.3A
At an inverter alarm
occurrence
×
(Shorted by reset)
×
(Can be selected using
Pr. 138, always open
when external thermal
relay is on)
×
353
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