MITSUBISHI ELECTRIC FR-A500L - Manual (Page 19)

INSTALLATION AND WIRING
11
(3) Connection of the power supply and motor
Ground
Ground
Ground
terminal
Power
supply
R S T U V W
R S T U V W Motor
No-fuse
breaker
The power supply cables must be
connected to R, S, T
1,
L
2,
L
3
>,
If they are connected to U, V, W,
the inverter will be damaged.
Connect the motor to U, V, W.
In the above connection,
turning on the forward rotation
switch (signal) rotates the motor
in the counterclockwise (arrow)
direction when viewed from
the load shaft.
(4) Connecting the control circuit to a power supply separately from the main circuit
If the magnetic contactor (MC) in the inverter power supply is opened when the protective circuit is operated,
the inverter control circuit power is lost and the alarm output signal cannot be kept on. To keep the alarm
signal on terminals R1 and S1 are available. In this case, connect the power supply terminals R1 and S1
11
and L
21
> of the control circuit to the primary side of the MC.
MC
R1
11
>
1) Loosen the upper screws.
2) Remove the lower screws.
3) Pull out and remove the jumper.
4) Connect the separate power supply
cables for control circuit to
upper terminals R1, S1
11,
L
21
>. (Note 4)
Power supply terminal
block for control circuit
Main power supply
Power supply terminal
block for control circuit
S
2 >
R
1 >
T
3
>
S1
21
>
Note: 1. When the main circuit power (R, S, T)
1
, L
2
, L
3
,> is on, do not switch off the control power
(terminals R1, S1
11
, L
21
>). Otherwise the inverter may be damaged.
2. When using a separate power supply, the jumpers across R-R1 and S-S1
1
-L
11
and L
2
-
L
21
>must be removed. Otherwise the inverter may be damaged.
3. For a different power supply system which takes the power of the control circuit from other than
the primary side of the MC, the voltage should be equal to the main circuit voltage.
4. The power supply cables must not be connected to the lower terminals. If connected, the inverter
may be damaged.
1
>
2
>
3
>
1
>
2
>
3
>