Unidrive SP
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Solutions Platform
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Power Accessories
INTERNAL DYNAMIC BRAKING RESISTORS
During deceleration, the mechanical energy stored in the spinning
mass of the motor and load is converted to electrical energy, which
recharges the drive's DC bus. Dynamic braking resistors provide a means
of rapidly dissipating that energy so that the drive does not fault
from overcharging the DC bus. The ohmic value and power rating of the
braking resistor is a function of the drive type and size.
A zero-space braking resistor is available for heatsink mounting
on Unidrive SP frame sizes 1 and 2. These resistors are designed for
low-inertia loads commonly used in servo type applications. For higher-inertia
loads, the heatsink mounted resistor may not have enough braking capacity,
and a larger external resistor may be required. No thermal protection
device is required with these heatsink-mounted resistor packages. |
Size 1 Unidrive SP heatsink shown |
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Unidrive SP
Size |
DC Resistance |
Power Rating |
Order Code |
| 1 |
75 Ohm |
50W |
SM-Heatsink DBR1 |
| 2 |
37.5 Ohm |
100W |
SM-Heatsink DBR2 |
| (Drives Larger than Size 2 do not have this option) |

E-STOP DUTY DYNAMIC BRAKING
Panel mounted DB resistors are designed for non-cyclic use where energy dissipation from an active drive is required. Resistors are supplied
with mounting hardware unless otherwise noted.
See Options and Accessories section for details

CYCLIC DUTY DYNAMIC BRAKING
These heavy-duty kits have been designed to provide dynamic braking for
cyclic and continuous braking applications.
See Options and Accessories section for details
EXTERNAL EMC FILTERS
EMC filters are used to minimize high frequency power supply line disturbances
caused by PWM AC drives that may interfere with proper operation of sensitive
electronic equipment. These specific filters have been assessed for conformance
with the EMC directive by testing with the appropriate Control Techniques
drives. The filters used with Unidrive SP have been designed to mount
in either Footprint or Bookend dimensions, allowing the user to optimize panel space.
See Options and Accessories section for details
IP54 AND IP55 FAN OPTIONS
For those applications using through-panel mounting, and located in demanding
enviornments, Unidrive SP can be fitted with optional fans providing either
IP54 or IP55 Ingress Protection Ratings. The chart below lists the available
fan options.
Unidrive SP
Frame Size |
IP54 Fan Option
Order Code |
IP55 Fan Option
Order Code |
1 |
3251-4824 |
3251-3824 |
2 |
3251-4824 |
3251-3824 |
3 |
N/A |
3251-1224 |
4 |
3251-7824 |
N/A |
5 |
Standard |
N/A |
6 |
Standard |
N/A |
Some additional parts are required for installation of these fans.
Please contact Control Techniques Technical Support for details.
ENCODER TERMINAL CONNECTOR
The 15 way D-Type Converter is used to simplify motor feedback wiring by "Breaking
out" the 15-pin D-connector signals to screw terminals.
| Description |
Order Code |
Encoder Screw
Terminal connector |
SM-ETC |
CONDUIT GLAND PLATES
New in 2005 and expanding in 2006 is the option of a conduit gland plate
for Unidrive SP wall-mount drives. Currently, conduit mounting plates are
available for Unidrive SP sizes 3, 4, and 5.
| Unidrive SP |
Model Number |
Order Code |
| Size 3 |
CBOX-S3 |
960400-01 |
| Size 4 and 5 |
CBOX-S4-5 |
960400-04 |
(Call factory for availability of conduit boxes for Unidrive SP
sizes 1, 2 and 6)

Information provided by Control Techniques, a world leader in the design, production
and marketing of electronic drives for the control of electric motors.
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