Mitsubishi Electric FR-A720-0.4K Instruction Manual page 360

Special operation and frequency control
(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"
MC1
MCCB
R/L1
S/L2
T/L3
R1/L11
S1/L21
Inverter start
(forward rotation)
STF
Inverter/electronic
CS
bypass 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 electronic 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
350
MC2
External
thermal relay
MC3
U
V IM
W
*1
MC
(MC1)IPF
1
MC3
*1
MC
(MC2)OL
2
MC2
*1
MC
(MC3)FU
3
SE
Installation Place
*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
24VDC
*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
Bypass operation
×
Output Terminal
Permissble Load
24VDC 0.1A
230VAC 0.3A
30VDC 0.3A
At an inverter alarm
operation occurrence
(Shorted by reset)
(Can be selected using
×
Pr. 138, always open
when external thermal
relay is on)
×
×
×