MITSUBISHI ELECTRIC FR-S520E - Manual (Page 52)

42
Connection to the Stand-Alone Option
1.6 Connection to the Stand-Alone Option
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.
1.6.1 Connection of the dedicated external brake resistor (option)
(FR-S520E-0.4K to 3.7K only)
Connect a brake resistor across terminals P/+ and PR. Connect a dedicated brake
resistor only. (For the locations of terminals P/+ and PR, refer to the terminal block
layout (page 6).)
REMARKS
A dedicated external brake resistor can be connected to the FR-S520E-0.4K to 3.7K.
CAUTION
If the transistors in the inverter should become faulty, the resistor can be
unusually hot, causing a fire. Therefore, install a magnetic contactor (MC) on
the inverter's power supply side to configure a circuit so that a current is shut
off in case of fault.
(For connection of the electro magnetic contactor, refer to page 16.)
FR-S520E-0.4K, 0.75K
PR
P/+
FR-S520E-1.5K to 3.7K
Brake resistor Brake resistor
V T/L3
N/- PR P/+ P1