Dynamic Braking Connections; General; Heat Sink Mount Resistor; Installation - YASKAWA F7 User Manual

http://www.aotewell.com

Dynamic Braking Connections

General

Dynamic braking (DB) enables the motor to be brought to a smooth and rapid stop. This is achieved by dissipating the
regenerative energy of the AC motor across the resistive components of the Dynamic Braking option. For further details on
dynamic braking operation, see the instruction sheet shipped with dynamic braking components.
Drives F7U20P4 thru F7U2018 and F7U40P4 thru F7U4018 have an integral braking transistor and require the addition of a
Remote Mounted Resistor Unit or a Heat Sink Mount Resistor (ERF). All higher rated Drives require the use of a Braking
Transistor Unit (CDBR) and a Remote Mount Resistor Unit.
Remote Mount Resistor Units typically mount outside of the electrical enclosure. Braking Transistor Units mount inside of the
electrical enclosure. Heat Sink Mount Resistors mount to the back of the Drive, attaching directly to the heat sink.
Drive
Rated
Drive Model
Input
No. F7U
Vac
20P4
20P7
208-240 21P5
22P2
23P7
40P4
40P7
480 41P5
42P2
43P7

Installation

This option should only be installed by a technically qualified individual who is familiar with this type of equipment and the
hazards involved.
Hazardous voltages can cause severe injury or death. Lock all power sources feeding the Drive in the "OFF" position.
Failure to follow these installation steps may cause equipment damage or personal injury.
Preliminary Procedures
1. Disconnect all electrical power to the Drive.
2. Remove Drive front cover.
3. Use a voltmeter to verify that voltage is disconnected from incoming power terminals and that the DC bus has dissipated.
Tel: +(86) 755 8660 6182
Table 2.8 Heat Sink Mount Dynamic Braking Resistor - 3% Duty Cycle
Qty.
Part No.
Reqd.
R7505 1
R7505 1
R7504 1
R7503 1
R7510 1
R7508 1
R7508 1
R7507 1
R7506 1
R7505 1
Electrical Installation 2 - 12
Aotewell

Heat Sink Mount Resistor

Resistance Power
(Ohms) (Watts)
200 150
200 150
100 150
70 150
62 150
750 150
750 150
400 150
300 150
200 150
WARNING
Aotewell
Email: Sales@aotewell.com
Approx. Dimensions (Inches)
Braking
Torque
Height
(%)
220 7.16
125 7.16
125 7.16
120 7.16
100 7.16
230 7.16
130 7.16
125 7.16
115 7.16
110 7.16
http://www.aotewell.com
Width Depth
1.73 0.51
1.73 0.51
1.73 0.51
1.73 0.51
1.73 0.51
1.73 0.51
1.73 0.51
1.73 0.51
1.73 0.51
1.73 0.51