Yaskawa GPD503 Drive - Manual (Page 154)

Braking Unit(s) and Braking Resistor Unit(s) Installation (for 230V 15HP(CT) and
above, 460V 25HP(CT) and above, 575V 30HP(CT) and above)
IMPORTANT
Since the Braking Resistor Unit generates heat during dynamic braking operation,
install it in a location away from other equipment which emits heat.
Select mounting locations for the Braking Unit(s) and Braking Resistor Unit(s) so that
wiring between the drive and the (Master) Braking Unit, and between each Braking Unit
and its associated Braking Resistor Unit, is less than 33 feet (10 m).
1. Mount the Braking Unit(s) and Braking Resistor Unit(s) on vertical surfaces. A
Braking Unit requires a minimum 1.18 inch (30 mm) clearance on each side and a
minimum 3.94 inch (100 mm) clearance top and bottom; a Braking Resistor Unit requires a
minimum 1.97 inch (50 mm) clearance in back (i.e. use mounting spacers) and a minimum
7.87 inch (200 mm) clearance in front.
2. Remove DB units’ front covers to access their terminals.
3. For 460V drives only: In each Braking Unit, set the PCB nominal line voltage jumper
plug to the correct setting for the installation; this is factory set at the "460V" position.
4. If multiple Braking Units are being installed, the unit closest to the drive should have
the SLAVE/MASTER jumper on its PCB set to the "MASTER" position (factory setting); all
others must have this jumper moved to the "SLAVE" position.
5. If a single Braking Unit and Braking Resistor Unit are being installed, connect them to
the drive and external control circuitry according to the chart below and Figure A7-4.
If two or more Braking Units and Braking Resistor Units are being installed, connect them
to the drive and to external circuitry according to the chart below and Figure A7-5.
A7-5
LEAD SIZE LEAD TERMINAL
UNIT TERMINALS
(AWG) TYPE SCREWS
Braking Resistor Unit
B, P 12-10 600V ethylene propylene M5
1, 2 * 18-14 * rubber insulated or equivalent M4
Braking Unit
P, Po, N, B 12-10 600V ethylene propylene
M4
1, 2 * 18-14 * rubber insulated, or equivalent
* Power leads for the Braking Resistor Unit generate high levels of electrical noise; these signal leads must be
grouped separately.