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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
Inverter start
(forward rotation)
Inverter/bypass
operation interlock
External
thermal reset
10
Frequency
setting signal
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
378
MC2
thermal relay
MC3
U
R/L1
S/L2
V
T/L3
W
R1/L11
S1/L21
MC1
*1
STF
(MC1)IPF
CS
MRS
MC2
MC3
*1
(MC2)OL
*3
JOG(OH)
RES
MC3
MC2
SD
*1
(MC3)FU
2
SE
5
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
External
Pr. 196 (output terminal function selection) .
Output Terminal Capacity
IM
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)
Bypass operation
Output Terminal
Permissible Load
24VDC 0.1A
230VAC 0.3A
30VDC 0.3A
During inverter
At an inverter fault
operation
occurrence
(Shorted by reset)
(Can be selected using
Pr. 138, always open
when external thermal
relay is ON)
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