CDBR-B Dynamic Braking Unit Instruction Manual March 2013 Part Number: 146-10001 R4 © Copyright 2013 Magnetek
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WA R N I N G • Do not touch any circuitry components while the main AC power is on. In addition, you must wait until the red “CHARGE” LED is out before performing any service on that unit. It may take as long as 10 minutes for the charge on the main DC bus capacitors to drop to a safe level. • Do not check signals during operation. • Make sure the unit is set for the appropriate voltage. • Make sure to ground the ground terminal. • Failure to observe these warnings can result in electrical shock.
CDBR-B Installation Instructions Preface A Dynamic Braking Unit and Resistor are used to dissipate regenerative energy from the motor. Whenever an excited motor is operated in the negative slip region or is subjected to an overhauling load, the motor will behave as an induction generator. In this mode, energy will actually flow from the motor back into the drive. This will cause the DC bus voltage to rise. When the DC bus voltage reaches a certain level, the Dynamic Braking Unit will activate.
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.
Installation Be sure the CDBR-B is mounted in a location that conforms to the following conditions: • Provide at least 3.94 in. (100mm) above and below the CDBR-B. • Provide at least 1.18 in (30mm) on either side of the CDBR-B. • Provide sufficient space between other components that generate heat or do not tolerate heat. • Free from drops of water and corrosive gases. • Free of dirt and dust. • Free of physical shock and vibration. Operational Verification 11.
Figure 1: CDBR Single Unit Wiring Diagram * Use terminal B1 when +3 is not available.
Figure 2: CDBR-B Parallel connection of Braking Unit CDBR-B Installation Instructions - March 2013 8
CDBR-B Parallel Connection Notes • Braking units have a MASTER/SLAVE selection jumper (See Figure 2). Select “MASTER” for Braking Unit 1 and “SLAVE” for all subsequent braking units. • Connect thermal protectors on the parallel CDBR-Bs in parallel to the drive’s multi-function input. • Use twisted pair wire, 18-14 AWG with ferrules, for connections between terminals 5, 6 and 1, 2 of the CDBR-Bs.
CDBR-B Braking Unit Dimensions "H1" "H" 4-M4 Mtg. Hole "W1" "D" "W" Figure 5: CDBR-B Drawing Table 2: CDBR-B Dimensions Dimensions in inches (mm) Model Number Overall Wt. in lbs. (kg) Mounting W H D W1 H1 d CDBR-2022B 5.51 (140) 5.91 (150) 5.45 (138.5) 5.04 (128) 5.43 (138) .16 (4) 4.56 (2.07) CDBR-4045B 5.51 (140) 5.91 (150) 5.45 (138.5) 5.04 (128) 5.43 (138) .16 (4) 4.82 (2.
d-4 places H H1 W1 W D Figure 6:CDBR-B Drawing Table 3: CDBR-B Dimensions Dimensions in inches (mm) Model Number Overall Wt. in lbs. (kg) Mounting W H D W1 H1 d CDBR-2045B 7.09 (180) 14.57 (370) 7.87 (200) 5.51 (140) 13.78 (350) 0.24 (6) 23.16 (10.51) CDBR-2110B 7.09 (180) 14.57 (370) 7.87 (200) 5.51 (140) 13.78 (350) 0.24 (6) 25.60 (11.61) CDBR-4090B 8.66 (220) 14.76 (375) 7.87 (200) 7.09 (180) 13.98 (355) 0.24 (6) 27.46 (12.46) CDBR-4220B 9.84 (250) 14.76 (375) 7.
Circuits and Wiring Specifications Table 4: Circuits and Wiring Specifications Model Number CDBR-2022B, 4045B, 5037B Circuit Terminals Main 1 4 Control CDBR-2045B, 4090B, 5110B Main 1 4 Control CDBR-4220B, 5300B 2 5 2 5 Main 1 4 Control 2 5 Wire Size AWG 0 0 12–10 3 6 18–14 0 0 10–8 3 6 18–14 0 0 4 8–6 3 6 18–14 Wire Type Terminal Screw Max. Torque lb. in. 600V vinyl sheathed wire or equivalent M4 13.3 600V vinyl sheathed wire or equivalent M5 21.7 M4 15.
Troubleshooting To troubleshoot the dynamic braking circuit (braking unit and braking resistor unit), refer to the chart below: Fault Status Drive trips at overvoltage (OV) Braking Unit Thermal Overload trips when not decelerating Braking Unit trips by heatsink overheat Possible Cause Corrective Action • • • • • Insufficient braking unit capacity Insufficient resistor capacity Improper wiring Deceleration time too short Braking unit fault • • • • • Verify CDBR-B capacity Verify resistor capacity V
3. Remove connector 3CN on 1PCB and place the ohmmeter leads on terminals 1 and 2 of the connector. The meter should read infinite Ohms. (Normally Open Thermal Relay (1THG). Replace connector 3CN. 4. Place the 4CN jumper on 1PCB to the “Master” position. 5. 230V Models Verify that the Power Supply Voltage Selection Jumper is set to 230V. With a variable DC power supply, which is capable of producing 400 VDC output, apply the DC voltage to terminals (+) and (-).
