2.5
Main circuit terminals
2.5.1
Details on the main circuit terminals
Terminal
Terminal name
symbol
R/L1, S/L2, T/
AC power input
L3
U, V, W
Inverter output
R1/L11, S1/
Power supply for the control circuit
L21
P/+, N/-
Brake unit connection
Brake unit connection for the FR-
F820-00770(18.5K) to 01250(30K)
P3, N/-
or FR-F840-00470(22K) to
01800(75K)
DC reactor connection for the FR-
F820-02330(55K) or lower or the
FR-F840-01160(55K) or lower
P/+, P1
DC reactor connection for the FR-
F820-03160(75K) or higher or the
FR-F840-01800(75K) or higher
Do not use terminals PX and PR. The terminal PX is provided for the FR-F820-00490(11K) or lower and the FR-
PR, PX
F840-00250(11K) or lower. The terminal PR is provided for the FR-F820-01250(30K) or lower and the FR-F840-
01800(75K) or lower.
Earth (ground)
Terminal function description
Connect these terminals to the commercial power supply.
Do not connect anything to these terminals when using the high power factor
converter (FR-HC2) or the power regeneration common converter (FR-CV).
Connect these terminals to a three-phase squirrel cage motor or a PM motor. —
Connected to the AC power supply terminals R/L1 and S/L2. To retain the
fault display and fault output, or to use a high power factor converter (FR-
HC2) or a power regeneration common converter (FR-CV), remove the
jumpers across terminals R/L1 and R1/L11 and across S/L2 and S1/L21, and
supply external power to these terminals.
The power capacity necessary when separate power is supplied from R1/
L11 and S1/L21 differs according to the inverter capacity.
FR-F820-00630(15K) or lower or FR-F840-00380(18.5K) or lower: 60 VA,
FR-F820-00770(18.5K) or higher or FR-F840-00470(22K) or higher: 80 VA
Connect the brake unit (FR-BU2, FR-BU, or BU), power regeneration
common converter (FR-CV), power regeneration converter (MT-RC), high
power factor converter (FR-HC2), or DC power supply (under DC feeding
mode).
When connecting multiple inverters, FR-F820-00770(18.5K) to 01250(30K)
or FR-F840-00470(22K) to 01800(75K), in parallel using the FR-CV or FR-
HC2, always use either terminal P/+ or P3 for the connection. (Do not use
terminals P/+ and P3 together.)
Do not connect the DC power supply between terminals P3 and N/-. Use
terminals P/+ and N/- for DC feeding.
Remove the jumper across terminals P/+ and P1, and connect a DC reactor.
When a DC reactor is not connected, the jumper across terminals P/+ and
P1 should not be removed.
Always connect a DC reactor, which is available as an option.
For earthing (grounding) the inverter chassis. Be sure to earth (ground) the
inverter.
Refer to
page
—
66
76
81
—
57
2. INSTALLATION AND WIRING
2.5 Main circuit terminals
1
2
3
4
5
6
7
8
9
10
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