AutomationDirect DURA PULSE GS-2DBU User manual

Dynamic Braking User Manual
GS-DB_UMW

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2nd Ed., Rev.C – 06/14/2019 – DURApulse Drives Dynamic Braking User Manual W–1
~ WARNING ~
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as AutomationDirect. We want your new automation equipment to operate safely. Anyone who
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NOTE: (Table)

W–2 DURApulse Drives Dynamic Braking User Manual – 2nd Ed., Rev.C – 06/14/2019
~ AVERTISSEMENT ~
Nous vous remercions d’avoir acheté l’équipement d’automatisation de Automationdirect.com©,
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2nd Ed., Rev.C – 06/14/2019 – DURApulse Drives Dynamic Braking User Manual W–3
~ WARNINGS ~
Warning: alWays read this manual thoroughly before using the durapulse dynamic brake
unit With the durapulse ac motor drive.
Warning: ac input poWer must be disconnected before performing any maintenance. do
not connect or disconnect Wires or connectors While poWer is applied to the circuit.
maintenance must only be performed by aqualified technician.
Warning: there are highly sensitive mos components on the printed circuit boards.
these components are especially sensitive to static electricity. toavoid damage to these
components, do not touch these components or the circuit boards With metal objects or
your bare hands.
Warning: a charge may still remain in the ac drive’sdc-link capacitor(s) With hazardous
voltages even if the poWer has been turned off to the ac drive. toavoid personal injury,
do not remove the cover of the durapulse dynamic brake unit or the ac drive until the
poWer has been disconnected from the ac drive and all “discharge” indicators on the
devices are off. please note that there are live components exposed Within the brake unit
and the ac drive. donot touch these live parts.
Warning: ground the durapulse dynamic brake unit using the ground terminal. the
grounding method must comply With the laWs of the country Where the brake unit is to be
installed. refer to the “basic braking Wiring diagram” shoWn in “chapter 3: component
configuration and Wiring.”
Warning: the mounting enclosure of the durapulse dynamic brake unit must comply With
en50178. live parts shall be arranged in enclosures or located behind barriers that meet at
least the requirements of the protective type ip20. the top surface of the enclosures or
barrier that is easily accessible shall meet at least the requirements of the protective type
ip40. users must provide this environment for the brake unit and braking resistor.

W–4 DURApulse Drives Dynamic Braking User Manual – 2nd Ed., Rev.C – 06/14/2019
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DURApUlse Dynamic Braking
User manUal revision History
2nd Ed., Rev.C – 06/14/2019 – DURApulse Drives Dynamic Braking User Manual H–1
Please include the Manual Number and the Manual Issue, both shown below, when communicating
with Technical Support regarding this publication.
Manual Number: GS-DB_UMW
Issue: Second Edition, Revision C
Issue Date: 06/14/2019
Publication History
Issue Date Description of Changes
First Edition 11/17/2003 Original
1st Ed. Rev.A 03/2004 Minor changes
1st Ed. Rev.B 07/2009 GS-2050-BR-ENC specifications
Second Edition 09/28/2017
User Manual name change (previous name: GS3-DB-M)
Added GS4 series AC Drives
Added (5) GS-xDB series Dynamic Braking Units; where x = 1,3,5,6,7
Added (19) GS-BR-xxxWxxx series Dynamic Braking Resistors
Added Chapters 2 and 3
Modifications to braking resistor dimension drawings Ch2
2nd Ed. Rev.A 10/26/2017 Bar code
Ch2: Dimensions for resistors GS-20P5-BR & GS-21P0-BR
2nd Ed. Rev.B 05/17/2019 User Manual name change (previous name: GS-DB_UMP)
Ch3: Thermal overload relay recommendation and wiring diagram
2nd Ed. Rev.C 06/14/2019 Ch3: Basic Braking Wiring Diagram

H–2 DURApulse Drives Dynamic Braking User Manual – 2nd Ed., Rev.C – 06/14/2019
User Manual Revision History
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GS DURApUlse AC DriveS
DynAmiC BrAkinG USer mAnUAl
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2nd Ed., Rev.C – 06/14/2019 – DURApUlse Drives Dynamic Braking User Manual TOC–1
User ManUal Contents
Warnings and tradeMarks � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � W–1
dUrapUlse dynaMiC Braking User ManUal revision History � � � � � � � � � � � � � � � � H–1
CHapter 1: Braking overvieW and CoMponent speCifiCations � � � � � � � � � � � � � � � � 1–1
Manual Overview � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–2
Overview of this Publication � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �1–2
Who Should Read This Manual � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �1–2
Supplemental Publications � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �1–2
Technical Support � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �1–2
Special Symbols � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �1–3
Introduction � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–3
Dynamic Braking � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �1–3
Dynamic Braking Units � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �1–3
Braking Duty Cycle � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–4
Overload Relay � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–5
Overload Relay Purpose � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �1–5
Overload Relay Selection Procedure and Example � � � � � � � � � � � � � � � � � � � � � � � � � � � �1–5
Dynamic Braking Component Selection for DURApulse AC Drives � � � � � � � � � � � � � � � � 1–6
Braking Component Selection for GS3 DURApulse Drives � � � � � � � � � � � � � � � � � � � � � � � �1–6
Braking Component Selection for GS4 DURApulse Drives � � � � � � � � � � � � � � � � � � � � � � � �1–7
Dynamic Braking Unit Specifications� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–8
Lamp/LED Indicators for Dynamic Braking Units � � � � � � � � � � � � � � � � � � � � � � � � � � � � �1–8
Dynamic Braking Resistors Specifications � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–9
CHapter 2: Braking CoMponent installation and diMensions � � � � � � � � � � � � � � � � 2–1
Installation� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 2–2
General Installation Guidelines � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �2–2
Minimum Clearances and Air Flow � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �2–2
Braking Unit Dimensions � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 2–4
Braking Resistor Dimensions� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 2–5

Table of Contents
TOC–2 DURApUlse Drives Dynamic Braking User Manual – 2nd Ed., Rev.C – 06/14/2019
CHapter 3: Braking CoMponent ConfigUration and Wiring � � � � � � � � � � � � � � � � � 3–1
Operational Electrical Information � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3–2
Overload Relay � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3–2
Dynamic Braking Unit Setup � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3–3
DBU Jumper and Wiring Terminal Locations � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3–3
DBU Voltage Jumper Settings � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3–4
DBU Master/Slave Jumper Settings � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3–5
Dynamic Braking Wiring � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3–6
Wiring Warnings and Notes � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3–6
Maximum Wiring Distances� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3–7
Dynamic Braking Unit Wiring Terminals� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3–7
Basic Braking Wiring Diagram� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3–9
Specific Braking Wiring Diagrams � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3–10

Braking Overview and
COmpOnent SpeCifiCatiOnS 1
1
1
Chapter
Chapter
Chapter
2nd Ed., Rev.C – 06/14/2019 – DURApUlse Drives Dynamic Braking User Manual 1–1
taBle of Contents
Manual Overview � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–2
Overview of this Publication � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–2
Who Should Read This Manual� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–2
Supplemental Publications� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–2
Technical Support� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–2
Special Symbols� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–3
Introduction � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–3
Dynamic Braking � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–3
Dynamic Braking Units � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–3
Braking Duty Cycle � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–4
Overload Relay � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–5
Overload Relay Purpose� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–5
Overload Relay Selection Procedure and Example � � � � � � � � � � � � � � � � � � � � � � � � 1–5
Dynamic Braking Component Selection for DURApulse AC Drives � � � � � � � � � � 1–6
Braking Component Selection for GS3 DURApulse Drives � � � � � � � � � � � � � � � � � � � � 1–6
Braking Component Selection for GS4 DURApulse Drives � � � � � � � � � � � � � � � � � � � � 1–7
Dynamic Braking Unit Specifications� � � � � � � � � � � � � � � � � � � � � � � � � � � � 1–8
Lamp/LED Indicators for Dynamic Braking Units � � � � � � � � � � � � � � � � � � � � � � � � � 1–8
Dynamic Braking Resistors Specifications� � � � � � � � � � � � � � � � � � � � � � � � � 1–9

Chapter 1: Overview and Component Specifications
1–2 DURApUlse Drives Dynamic Braking User Manual – 2nd Ed., Rev.C – 06/14/2019
Manual Overview

The dUrapUlse Dynamic Braking User Manual describes the installation, wiring,
configuration, and operation of the dynamic braking unit and braking resistors as used with
GS3 and GS4 series dUrapUlse AC Drives.
The content of this user manual may be revised without prior notice. Please visit the
Automationdirect.com website to download the most recent version.
(www.automationdirect.com)

This manual contains important information for those who will install, maintain, and/or
operate any dUrapUlse GS3 or GS4 series AC Drive that makes use of the dynamic braking in
their application.

The dUrapUlse AC Drive User Manuals (GS3-M & GS4-M) are available from AutomationDirect
and should be used along with this manual to properly install and operate both the
dUrapUlse AC drive and the dUrapUlse dynamic braking unit.
The National Electrical Manufacturers Association (NEMA) publishes many different
documents that discuss standards for industrial control equipment. Global Engineering
Documents handles the sale of NEMA documents. For more information, you can contact
Global Engineering Documents at:
15 Inverness Way East
Englewood, CO 80112-5776
1-800-854-7179 (within the U.S.)
303-397-7956 (international)
www.global.ihs.com
NEMA documents that might assist with your AC drive systems are:
• Application Guide for AC Adjustable Speed Drive Systems
• Safety Standards for Construction and Guide for Selection, Installation, and Operation of
Adjustable Speed Drive Systems

By Telephone: [phone] (Mon.-Fri., 9:00 a.m.-6:00 p.m. E.T.)
On the Web: www.automationdirect.com
Our technical support group is glad to work with you in answering your questions. If
you cannot find the solution to your particular application, or, if for any reason you need
additional technical assistance, please call technical support at 770-844-4200. We are
available weekdays from 9:00 a.m. to 6:00 p.m. Eastern Time.
We also encourage you to visit our website where you can find technical and non-technical
information about our products and our company. Visit us at www.automationdirect.com.

Chapter 1: Overview and Component Specifications
2nd Ed., Rev.C – 06/14/2019 – DURApUlse Drives Dynamic Braking User Manual 1–3

When you see the “notepad” icon in the left-hand margin, the paragraph to its
immediate right will be a special note.
When you see the “exclamation mark” icon in the left-hand margin, the paragraph to
its immediate right Will be aWarning. this information could prevent injury, loss of
property, or even death (in extreme cases).
Introduction

All dUrapUlse GS3 and GS4 series AC drives are capable of dynamic braking to enable an AC
motor with a high-inertia load to decelerate more rapidly than could be otherwise achieved,
and to absorb the energy generated when a three-phase induction motor decelerates.
Applications with high-inertia type loads tend to cause the motor to regenerate energy back
into the AC drive. This regeneration causes the AC drive’s internal DC bus voltage to rise,
which can cause an over voltage fault. With dynamic braking, the energy generated by the
overhauling motor is dissipated through dedicated braking resistors as heat.
As shown in the selection tables in this chapter, lower-capacity drives can connect directly
to the optional external braking resistors, but higher-capacity drives also require optional
dynamic braking units installed between the drives and resistors.

dUrapUlse dynamic braking units are used with larger dUrapUlse AC Drives to continuously
monitor the drive’s DC bus voltage. When bus voltage exceeds a predetermined level
(depending on the supply voltage) the dynamic braking unit dissipates the excess energy
into external resistors in the form of heat. dUrapUlse dynamic braking units must be used
along with GS series braking resistors to provide optimum braking performance.
dUrapUlse dynamic braking units are available for both 230V or 460V dUrapUlse AC Drives.
MASTER/SLAVE configurations allow the use of multiple dUrapUlse dynamic braking units in
order to accommodate the power ratings of larger dUrapUlse AC Drives and motors.
dUrapUlse dynamic braking units (GS-1DBU, GS-2DBU, GS-3DBU and GS-4DBU) are approved
by Underwriters Laboratories, Inc. (UL) and Canadian Underwriters Laboratories (cUL).

After receiving the dUrapUlse dynamic braking unit, please check for the following:
• Make sure that the part number indicated on the package corresponds with the part number of
your order.
• Make sure that the package includes the dUrapUlse dynamic braking unit and the dUrapUlse
dynamic braking unit User Manual.
• Inspect the contents to insure they were not damaged during shipment.

Chapter 1: Overview and Component Specifications
1–4 DURApUlse Drives Dynamic Braking User Manual – 2nd Ed., Rev.C – 06/14/2019
Braking Duty Cycle
Application of a dUrapUlse dynamic braking unit should take into account how often the
motor will stop or decelerate during normal operation. The Duty Cycle is the percentage
of time the brake is actually used during deceleration in comparison to the time elapsed
between each start or acceleration of the motor. This Duty Cycle percentage is necessary to
allow the dynamic braking unit and braking resistor(s) sufficient time to dissipate the heat
created during dynamic braking. If the Duty Cycle is exceeded, the braking resistor will not
cool sufficiently, causing resistance to increase as the temperature rises with the loss of
effective braking torque.
Example: If in a given application it is determined that it will take 10 seconds for the motor
to decelerate to a stop using dynamic braking, then the motor can only be cycled on and off
continuously every 1.6 minutes (100 seconds).
• 10 / 100 x 100 = 10% Duty Cycle
Duty Cycle =
T0/T1 x 100(%)
Braking
Time
Cycle Time
100%
T0
T1
The maximum braking On-Time for the maximum 10% Duty Cycle is 10 seconds.

Chapter 1: Overview and Component Specifications
2nd Ed., Rev.C – 06/14/2019 – DURApUlse Drives Dynamic Braking User Manual 1–5
Overload Relay

For safety purposes, install an external overload relay between the dynamic brake unit and
the braking resistor. The thermal overload relay protects the braking resistor from damage
due to frequent braking, or due to the braking unit operating excessively due to unusually
high input voltage.

(For a GS4-4150 drive)
1) Select a thermal overload relay based on its overload capability.
60
40
30
20
10
8
3
2
4
6
1
0.8
0.6
0.4
0.3 0.8 1 1.5 2 3 4 5 6 8 10 157 9
Mu ltiple o f Current Settin g xln (A)
Tripping Time
seconds
2.6
Thermal Overload Response Curve
(for typical hypothetical thermal O/L relay)
Standard braking capacity for
GS3 and GS4 AC drives is 10%
duty cycle (tripping time = 10s).
Determine the 10s Overload
Capacity (Multiple of Current
Setting) for your selected
overload relay.
The intersection of the Trip Time
(10s) and the Multiple of Current
Setting is 2.6 (or 260%) for this
example response curve.
The property of each thermal
relay may vary by
manufacturer, so please read
the specifications carefully.
2) Use the appropriate AC Drive Braking Component Selection table in this chapter to find the
Max Total Brake Current for the motor, drive, and braking components (126A for this example).
GS4AC Drive BrAkinG Component SeleCtion
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
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
150 110 4150 1 5DBU 10 1K2W015 74.5 126 6.0 126 95.8 L
3) Divide the Max Total Braking Current by the Overload Capacity (126A / 2.6 = 48.46A), and select
a thermal O/L relay which has the same or higher rated current. In this case, select a 50A
relay.
For wiring information, refer to “Overload Relay” in Chapter 3, page 3–2.

Chapter 1: Overview and Component Specifications
1–6 DURApUlse Drives Dynamic Braking User Manual – 2nd Ed., Rev.C – 06/14/2019
Dynamic Braking Component Selection for  AC Drives
The following table provides the selection information for the DURApUlse dynamic braking
units designed for use with GS3 and GS4 series AC drives.

GS3AC Drive BrAkinG Component SeleCtion



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


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#
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230V
1 0.7 
0n/a
1 0.5 1.9 82 4.6 1.8
A
2 1.5  1 1.0 3.8 82 4.6 1.8
3 2.2  1 1.5 5.4 82 4.6 1.8
5 3.7  1 2.5 9.5 33 11.5 4.4
7.5 5.5  1 3.7 12.7 30 12.7 4.8
10 7.5  1 5.1 19.0 20 19.0 7.2
15 11  1 7.5 27.9 13.6 27.9 10.6
20 15  1 1 10.2 38.0* 10* 38.0* 14.4*
D25 18  1 1 12.2 47.5* 8* 47.5* 18.1*
30 22  1 1 14.9 55.9* 6.8* 55.9* 21.2*
40 30  2 2 20.3 38.0* 10* 38.0* 14.5* F
50 37  2 2 25.1 47.5* 8* 47.5* 18.1*
460V
1 0.7 
0n/a
1 0.5 1.0 160 4.8 3.6
A
2 1.5  1 1.0 1.9 160 4.8 3.6
3 2.2  1 1.5 3.0 160 4.8 3.6
5 3.7  1 2.5 5.1 130 5.8 4.4
7.5 5.5  1 3.7 7.6 91 8.4 6.3
10 7.5  1 5.1 10.1 62 12.3 9.3
15 11  1 7.5 15.2 39 19.5 14.8
20 15  1 1 10.2 19.0* 40* 19.0* 14.4*
D
25 18  1 1 12.2 23.8* 32* 23.8* 18.1*
30 22  1 1 14.9 27.9* 27.2* 27.9* 21.2*
40 30  1 1 20.3 38.0* 20* 38.0* 28.9*
50 40  1 1 25.1 47.5* 16* 47.5* 36.1*
60 45  1 1 30.5 55.9* 13.6* 55.9* 42.5*
75 55  2 2 37.2 38.0* 20* 38.0* 28.9* F
100 75  2 2 50.8 55.9* 13.6* 55.9* 42.5*
* These values are per individual DBU, as seen between DBU terminals B1 and B2.
** Wiring diagrams are shown in Chapter 3: Component Configuration and Wiring.
*** 10% Duty Cycle with maximum ON (braking) time of 10 seconds.

Chapter 1: Overview and Component Specifications
2nd Ed., Rev.C – 06/14/2019 – DURApUlse Drives Dynamic Braking User Manual 1–7

GS4AC Drive BrAkinG Component SeleCtion


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

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#
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


1 0.7 
0n/a
1 0.5 1.9 63.3 6 2.3
A
2 1.5  1 1.0 4.2 47.5 8 3.0
3 2.2  1 1.5 5.4 38.0 10 3.8
5 3.7  1 2.5 9.5 19.0 20 7.6
7.5 5.5  1 3.7 19 14.6 26 9.9
10 7.5  1 5.1 19 14.6 26 9.9
15 11  1 7.5 29 12.6 28 10.6
20 15  2 10.2 44 8.3 46 17.5
B25 18  2 12.2 44 8.3 46 17.5
30 22  2 14.9 58 5.8 66 25.1
40 30  2 4 20.3 75* 4.8* 80* 30.4*
G50 37  2 4 25.1 97* 3.2* 120* 45.6*
60 45  2 4 30.5 118* 3.2* 120* 45.6*
75 55  3 6 37.2 145* 2.1* 180* 68.4* J
100 75  4 8 50.8 190* 1.6* 240* 91.2* K

1 0.7 
0n/a
1 0.5 1 190 4 3.0
A
2 1.5  1 1 2.1 126.7 6 4.6
3 2.2  1 1.5 3 108.6 7 5.3
5 3.7  1 2.5 5.1 84.4 9 6.8
7.5 5.5  1 3.7 10.2 54.3 14 10.6
10 7.5  1 5.1 10.2 47.5 16 12.2
15 11  1 7.5 17.6 42.2 18 13.7
20 15  2 10.2 24 26.2 29 22.0
B25 18  2 12.2 24 23.0 33 25.1
30 22  2 14.9 29 23.0 33 25.1
40 30  4 20.3 47.5 14.1 54 41.0 C
50 40  1 4 25.1 50* 12.7* 60* 45.6* E
60 45  1 4 30.5 59* 12.7* 60* 45.6*
75 55  2 8 37.2 76* 9.5* 80* 60.8* H
100 75  2 8 50.8 100* 6.3* 120* 91.2* I
125 90  2 8 60.9 117* 6.3* 120* 91.2*
150 110  1 10  74.5 126* 6.0* 126* 95.8* L
175 132  1 12  89.4 190* 4.0* 190* 144.4* M
200 160  1 12  108.3 190* 4.0* 190* 144.4*
250 185  1 14  125.3 225* 3.4* 225* 172.1* N
300 220  2 20  148.9 252* 3.0* 252* 190.5* O
* These values are per individual DBU, as seen between DBU terminals B1 and B2.
** Wiring diagrams are shown in Chapter 3: Component Configuration and Wiring.
*** 10% Duty Cycle with maximum ON (braking) time of 10 seconds.

Chapter 1: Overview and Component Specifications
1–8 DURApUlse Drives Dynamic Braking User Manual – 2nd Ed., Rev.C – 06/14/2019
Dynamic Braking Unit Specifications
The following table provides the specifications and applications for the dUrapUlse dynamic
braking units designed for use with GS3 and GS4 series AC drives.
DynAmiC BrAkinG Unit SpeCifiCAtionS
 













 230 460
 20
[15]
30
[22]
40
[30]
60
[45]
150
[110]
200
[160]
250
[185]


 40 60 40 60 126 190 225
 15 20 15 18 45 50 100
 330/345/360/
380/400/415 ±3V
660/690/720/
760/800/830 ±6V
618/642/667/690/
725/750 ±6V
 10
 200–415 400–830 400–750

 10 6.8 20 13.6 6 4 3.4

 Comes ON until DC bus voltage
(+P – -N) drops below 50VDC
Comes ON when DC bus
voltage (DC+ – DC-) rises
above 300VDC.
Goes OFF when DC bus
voltage (DC+ – DC-) drops
below 100VDC.
 ON during braking
 ON if an over-temperature fault has
occurred n/a
 n/a 190 290 340
 n/a Comes ON > 176°F [80°C];
Goes OFF < 149°F [65°C]
 203°F [95°C] n/a
 5A @ 120VAC/28VDC (RA,RB,RC) 3A @ 250VAC/28VDC
(RA,RC)

 indoor (no corrosive gases; no metallic dust)
 14°F to 122 °F [-10 to +50 °C]
 -4 to +140 °F [-20 to +60 °C]
 less than 90% RH, non-condensing
 9.8 m/s2[1G] under 20Hz ; 2m/s2[0.2G] at 20–50 Hz
 IP50 wall-mount enclosed IP10 wall-mount enclosed
* 10% Duty Cycle with maximum ON (braking) time of 10 seconds

CHARGE ACT OC OH
GS-5DBU, GS-6DBU, GS-7DBU
CHARGE
(GREEN) ACT
(YELLOW)
ERR
(RED)
GS-1DBU, GS-2DBU, GS-3DBU, GS-4DBU
See “DBU Jumper and Wiring Terminal Locations” in Chapter 3 for locations of indicators.

Chapter 1: Overview and Component Specifications
2nd Ed., Rev.C – 06/14/2019 – DURApUlse Drives Dynamic Braking User Manual 1–9
Dynamic Braking Resistors Specifications
BrAkinG reSiStor SpeCifiCAtionS
    

 80 200
open
1
 80 200 1
 300 100 1
 300 70 1
 400 40 1
 500 30 2
 1000 20
enclosed
4
 2400 13.6 5
 3000 10 5
 4800 8 6
 4800 6.8 6
 3000 10 5
 4800 8 6
 80 750
open
1
 300 400 1
 300 250 1
 400 150 1
 500 100 2
 1000 75 3
 1000 50
enclosed
4
 1500 40 7
 4800 32 8
 4800 27.2 8
 6000 20 8
 9600 16 9
 9600 13.6 9
 6000 20 8
 9600 13.6 9
 80 200
open
10
 80 750 10
 200 91 10
 200 360 10
 300 70 10
 300 250 10
 400 40 10
 400 150 10
 1000 4.3 11
 1000 5.1 11
 1000 16 11
 1000 20 11
 1000 75 11
 1200 3.9 11
 1200 15 11
 1500 3.3 11
 1500 12 11
 1500 13 11
 1500 43 11

Chapter 1: Overview and Component Specifications
1–10 DURApUlse Drives Dynamic Braking User Manual – 2nd Ed., Rev.C – 06/14/2019
BLANK
PAG E