
CDBR-B Installation Instructions - March 2013
5
Installation
Mounting/Wiring
1. Disconnect all electrical power to the drive.
2. Remove drive front cover.
3. Verify that voltage has been disconnected by using a voltmeter to check for voltage at the
incoming power terminals.
4. The braking unit and braking resistor emit heat during operation. Select a mounting location
away from other heat emitting devices or devices that are heat sensitive. To guarantee proper
air-flow for cooling, the braking unit should not be mounted any closer to external devices than
1.18 in. (30mm) on either side and 3.94 in. (100mm) of the top and bottom. Select mounting
locations so that the wiring distances between the drive and the braking unit is less than 16.4
feet (5m), and the distance between the braking unit and the braking resistor is less than 32.8
feet (10m).
5. Make connections between the drive, braking unit(s), and braking resistor(s) according to Figure
1 or Figure 2 (multiple units).
Grounding
6. The enclosure of the braking unit should be grounded. If the braking unit cannot be mounted in a
grounded enclosure, ground it by using a lead from the mounting screw of the unit.
7. Grounding resistance of the braking unit should be 100 ohms or less.
8. Use a grounding lead conforming to your National Electric code.
Adjustments
9.
a) It may be necessary to change the appropriate input voltage selection. This determines
the voltage that the dynamic braking unit will turn on. See Figure 3 or 4 and set the jumper
to the nominal three phase supply voltage. Table 1 indicates the DC voltage level that the
braking unit will turn on for different jumper settings. Failure to set the jumper at the
nominal voltage can cause premature failure of the braking unit.
b) If two or more braking modules are applied, ensure that unit #1 is set as the MASTER
while the other unit(s) are set for SLAVE. See Figure 1 or 2 (depending on number of
braking modules). If only one braking unit is applied, verify that the jumper is set to
MASTER.
10. The installation of the braking unit may require programming of the drive.
a) For an IMPULSE®•G: Program Sn-05 to xx1
x, which disables stall prevention during
deceleration.
b) For an IMPULSE®•G+: Program Sn-07 to xx1
x, which disables stall prevention during
deceleration.
c) For an IMPULSE®•G+ and VG+ Series 2: Program L3-04 to 0
, which disables stall
prevention during deceleration.
d) For an IMPULSE®•G+ and VG+Series 4: Program L08-55 to 0
, which disables the RF
fault.
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