Rockwell Automation FlexPak Plus, MinPak Plus DC Drive Dynamic Braking User Manual
Dynamic Braking Kit
for FlexP ak Plus and MinP ak Plus DC Drives
Model Numbers 14C214, 14C215, 14C216
Instruction Manual D2-3378
ATTENTION:Only qualified electrical personnel familiar with the construction and operation of
this equipment and the hazards involved should install, adjust, operate, and/or service this
!
Product Description
Installation of the Dynamic Braking kit enables a single-phase FlexPak™ Plus or MinPak™ Plus DC drive to
provide rapid, smooth stopping of the motor. If the Dynamic Braking kit is not used, the drive causes the motor
to coast to rest when the contactor opens.
The Dynamic Braking kit includes a resistor that is automatically switched across the motor’s armature when
the drive is stopped. The rotating mechanical energy of the motor is converted into electrical energy that is
rapidly dissipated as heat. The resistor is sized for infrequent stops, so time must be allowed between stops for
the heat to dissipate.
equipment. Read and understand this manual and other applicable manuals in their entirety
before proceeding. Failure to observe this precaution could result in severe bodily injury or loss
of life.
Important: The dynamic brake is not a mechanical holding brake. It will not hold the motor shaft in place. It will
not prevent the motor from turning once motion has stopped.
The Dynamic Braking kit must be rated for the drive’s horsepower and voltage rating, as shown in table 1. Refer
to your drive’s nameplate for the horsepower and voltage rating. The Dynamic Braking kit contents are also
listed in table 1.
Table 1 – Contents of the Dynamic Braking Kit
Description Quantity Kit Model Number and Rating Reliance Part Number
Dynamic Braking Resistor 1 14C214
1/4 to 1/2 HP @ 115 VAC
2 to 3 HP @ 230 VAC
1 14C215
3/4 HP @ 115 VAC
1 14C216
1/2 to 1-1/2 HP and 5 HP @ 230 VAC
Mounting Screw, 4-40 x 3/8 2 All 601741-74C
Instruction Manual 1 All D2-3378
63481-150QHC
63481-150QCC
63481-150QNC
Reliance and MinPak are trademarks of Rockwell Automation.
© 1998 Rockwell International Corporation
Installing the Dynamic Braking Kit in a FlexPak Plus DC Drive
ATTENTION:
out, and tag all sources of incoming AC power to the drive before attempting such installation.
!
Important:
Refer to your FlexPak Plus DC drive instruction manual for help locating and identifying drive components.
Step 1. Disconnect, lock out, and tag input power to the drive.
Step 2. Remove the drive cover.
Step 3. Verify that no voltage is present at the drive’s AC input terminals, L1 and L2.
Step 4. Mount the dynamic braking resistor in the upper right corner on the back of the FlexPak Plus auxiliary
Step 5.
V erify that no voltage is present at the drive’s AC input terminals, L1 and L2. Failure to observe
this precaution could resu lt in severe bodily injury or loss of life.
ATTENTION:
international codes. Failure to observe this precaution could result in damage to, or destruction
of, the equipment.
Dynamic Braking kit installation procedures are different for FlexPak Plus drives and MinPak Plus
DC drives. This section describes installation in a FlexPak Plus drive. See the next section for
installation in a MinPak Plus drive.
panel. Use the two mounting screws provided.
For all regenerative FlexPak Plus DC drives, and for non-r egenerative FlexPak Plus DC drives
without a Reversing Cont actor:
(NC) contacts of the drive’s M-contactor (terminals 7 and 8). This places the resistor across the
motor’s armature (A1 and A2) when the M-contactor is de-energized. Refer to figures 1 and 2.
Do not install modification kits with power applied to the drive. Disconnect, lock
The user is responsible for conforming with all applicable local, national, and
Connect the dynamic braking resistor between the normally closed
2
Dynamic Braking Kit for FlexPak Plus and MinPak Plus DC Drives
Dynamic Braking Resistor
M-Contactor or
8
6
7
5
Forward Contactor
4
A1
Figure 1 – Dynamic Braking Resistor Connections for Regenerative FlexPak Plus Drives
and Non-Regenerative FlexPak Plus Drives Without a Reversing Contactor
3
A2
Dynamic Braking Kit for FlexPak Plus and MinPak Plus DC Drives
3
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