Mitsubishi FR-A500 Series - Connection of Stand-Alone Option Units

INSTALLATION AND WIRING
24
2.2.5 Connection of stand-alone option units
The inverter accepts a variety of stand-alone option units as required.
Incorrect connection will cause inverter damage or accident. Connect and operate the option unit carefully in
accordance with the corresponding option unit manual.
(
1
)
Connection of the dedicated external brake resistor (option)
The built-in brake resistor is connected across terminals P
〈
+
〉
and PR. Fit the external dedicated brake
resistor (option) instead when the built-in brake resistor does not have enough thermal capability for high-duty
operation. Remove the jumper from across terminals PR-PX and connect the dedicated brake resistor
(option) across terminals P-PR
〈
+ -PR
〉
.
(For the positions of terminals P and PR, refer to the terminal block arrangement (page14 and 15).)
Note: 1. The brake resistor connected should only be the dedicated brake resistor.
2. The jumper across terminals PR-PX must be disconnected before connecting the dedicated
brake resistor. A failure to do so may damage the inverter.
•
••
•
Model..............FR-A520-0.4K to 3.7K, FR-A540-0.4K to 3.7K
1) Remove the screws in terminals PR and PX and remove the jumper.
2) Connect the brake resistor across terminals P-PR
〈
+ -PR
〉
.
(The jumper should remain disconnected.)
Removal of jumper FR-A520-0.4K, 0.75K
FR-A520-1.5K to 3.7K
FR-A540-0.4K to 3.7K
Terminal PX
Terminal PR
Jumpe
r
Terminal PR
Terminal P
Terminal P
R
Terminal P
•
••
•
Model..............FR-A520-5.5K, 7.5K, FR-A540-5.5K, 7.5K
1) Remove the screws in terminals PR and PX and remove the jumper.
2) Connect the brake resistor across terminals P-PR
〈
+ -PR
〉
.
(The jumper should remain disconnected.)
Removal of jumper
FR-A520-5.5K, 7.5K
FR-A540-5.5K, 7.5K
Jum
p
er
T
erminal PR
Terminal PX
Terminal PR
Terminal PR
2