Wiring Instructions - Mitsubishi FR-BU2-1.5K Instruction Manual

WIRING

3.7 Wiring Instructions

(1) When using this brake unit with the FR-A500, A700 series inverter
7.5K or less or FR-V500 series inverter 5.5K or less, be sure to
remove a jumper across terminal PR and PX.
(A failure to do so may damage a built-in brake resistor.)
(2) Correctly connect the terminals P/+, N/- of the brake unit and
terminals P, N of the inverter.
FR-BU2-(H)
P/+
N/-
Correct connection
(3) Minimize the cable length between the inverter and brake unit and
the resistor unit and brake unit. In addition, twist five times or more
per 1m. (Use a twisted cable when the wiring length exceeds 5m.
Even when the wiring is twisted, the cable length must not exceed
10m.)
The brake unit may be damaged if cables are not twisted when the
wiring length is 5m or more or the wiring length exceeds 10m or
more even if cables are twisted.
Use the wires of the above recommended size or larger (refer to page
6 ).
The difference color cables twisted is recommended to prevent
miswiring.
(4) Do not allow wire offcuts to enter the unit, e.g. cover the vent hole at
the top during wiring operation.
28
Inverter
P
N
Twist
Inverter
Brake unit
P/+
P
N/-
N
Within 10m
FR-BU2-(H)
P/+
N/-
Wrong connection
Resistor unit
P
P
PR
PR
Within 10m
Inverter
P
N