KB Genesis KBAC-24D User manual

Installation & Operation Manual
KBAC ERIE
Variable Speed / Soft-Start AC Motor Drive
with Electronic Motor Overload Protection for Inverter Duty Motors1
Washdown and Watertight for Indoor and Outdoor Use
Rated for 208 – 230 and 400/460 Volt 50 & 60 Hz
3-Phase & PSC2AC Induction Motors from Subfractional thru 5 HP
Operates from 115, 208/230 Volt and 400/460 Volt 50/60 Hz AC Line2,3
See Safety Warning,
on page 5.
NOTE: THE DRIVE IS FACTORY SET FOR
60 Hz MOTORS. FOR 50 Hz MOTORS,
SEE SECTION 6.4, ON PAGE 17.
The information contained in this manual is intended to be accurate. However, the manufacturer retains
the right to make changes in design which may not be included herein.
Notes: 1. UL approved as an electronic overload protector for motors. 2. Special software is availa le – contact
our Sales Department. 3. Do not use this drive with GFCIs. 4. Installation of a CE approved RFI filter is required.
© 2008 KB Electronics, nc.
(see back cover)
Adjustable Frequency Drives for 3-Phase AC Motors
NEMA-4X/IP-65
4
This Manual Covers Models BAC-24D, 27D, 29, 45, 48

TABLE OF CONTENTS
Section Page
1 Quick-Start nstructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Safety Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 ntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 mportant Application nformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Wiring nstructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6 Setting Selectable Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7 Mounting nstructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8 Recommended High Voltage Dielectric Withstand Testing (Hi-Pot Testing) . . . . . . . . . . . . . . . . . . . . . . . . . 19
9 Drive Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
10 AC Line Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
11 Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
12 Trimpot Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Tables Page
1 Jumper Selectable Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 General Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Electrical Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 Terminal Block Wiring nformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6 Drive Operating Condition and Run/Fault Relay Contact Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7 Drive Operating Condition and Status LED ndicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figures Page
1 Quick-Start Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Control Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Model KBAC-24D Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Models KBAC-27D, 29, 45, 48 Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 Maximum Allowed Motor Torque vs. Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6 Open Ventilated Motor with External Fan Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7 Models KBAC-24D, 27D AC Line nput, Motor, and Ground Connections . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Models KBAC-29, 45, 48 AC Line nput, Motor, and Ground Connections . . . . . . . . . . . . . . . . . . . . . . . . 14
9 Remote Main Speed Potentiometer Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10 Remote Start/Stop Switch Connection with Normally Open Stop Contact . . . . . . . . . . . . . . . . . . . . . . . . 15
11 Remote Start/Stop Switch Connection with Normally Closed Stop Contact . . . . . . . . . . . . . . . . . . . . . . . 15
12 Start/Stop Function Eliminated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
13 Voltage Following Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
14 Enable Circuit Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
15 Run/Fault Relay Output Contacts Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
16 Models KBAC-24D, 27D AC Line nput Voltage Selection (Jumper J1) . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
17 Removing Jumper J1 on Models KBAC-24D, 27D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
18 Motor Horsepower Selection (Jumper J2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
19 Automatic Ride-Through or Manual Restart Selection (Jumper J3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
20 60 Hz and 50 Hz Motor Selection (Jumpers J4 and J5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
21 Available Torque vs. Output Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
22 120 Hz and 100 Hz Drive Output Frequency Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
23 Fixed or Adjustable Boost Selection (Jumper J6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
24 Regenerative or DC njection Braking Selection (Jumper J7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
25 “Run” or “Fault” Output Relay Operation Selection (Jumper J8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
26 Normally Open or Closed Stop Contact Selection (Jumper J9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
27 Constant or Variable Torque Selection (Jumper J10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
28 2t Overload Selection (Jumper J11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
29 Typical Hi-Pot Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
ii

30 Minimum Speed Trimpot (M N) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
31 Maximum Speed Trimpot (MAX) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
32 Acceleration Trimpot (ACCEL) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
33 Deceleration Trimpot (DECEL) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
34 DC njection Brake Trimpot (DECEL) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
35 Slip Compensation Trimpot (COMP) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
36 Current Limit Trimpot (CL) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
37 2t Trip Time vs. Motor Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
38 Boost Trimpot (BOOST) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
39 Run-Stop-Jog Switch Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
40 Jog Trimpot (JOG) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Items Included In this Package:
Adjustable Frequency Drive, nstallation and Operation Manual, Trimpot Adjustment Tool, CE Approved Product
nformation Card, Warranty Registration Card.
iii
Model o.
Part o.
Black White*
BAC-24D 9987 9988
BAC-27D 9520 9521
BAC-29 9528 9529
BAC-45 9530 9531
BAC-48 9540 9541
Drive Model os. and Part os.
*White FDA approved finish.
230 VAC Controls
Suitab e For Use On A Circuit Capab e Of De ivering Not More Than 5 kA RMS Symmetrica Amperes,
230 Vo ts Maximum.
Use Copper Conductors Rated 75 ºC.
Suitab e for Operation in a Maximum Surrounding Air Temperature of 40 ºC.
460 VAC Controls
Suitab e For Use On A Circuit Capab e Of De ivering Not More Than 5 kA RMS Symmetrica Amperes,
460 Vo ts Maximum.
Use Copper Conductors Rated 75 ºC.
Suitab e for Operation in a Maximum Surrounding Air Temperature of 40 ºC.
UL Notice

4
See Figure 1. Also see Section 4 - Important Application Information, on page 12.
WARNING! Disconnect main power before making connections to the drive.
1 QUICK- TART IN TRUCTION
1.1 AC LINE INPUT CONNECTION – Wire the AC line input to Terminal Block TB1. See Section 5.1, on
pages 13 – 14.
Application Note: Do not wire this drive to a GFCI. If operation with a GFCI is required, contact
our Sales Department.
Note: The rated AC line voltage of the drive must match the actual AC line input voltage. On Models
KBAC-24D, 27D, the setting of Jumper J1 must match the AC line input voltage.
Models BAC-24D, 27D: Designed to accept single-phase (Terminals “L1”, “L2”) AC line input only.
Rated for 208/230 Volt AC line input with Jumper J1 set to the “230V” position (factory setting). Rated
for 115 Volt AC line input with Jumper J1 set to the “115V” position. See Figure 7, on page 13.
Note: Model KBAC-27D is rated for 11⁄2H maximum with 115 Volt AC line input and 2 H maximum
with 208/230 Volt AC line input.
Model BAC-29: Designed to accept single-phase (Terminals “L1”, “L2”) or 3-phase (Terminals “L1”,
“L2”, “L3”) AC line input. Rated for 208/230 Volt AC line input only. See Figure 8, on page 14.
Note: Rated for 2 H maximum with single-phase AC line input and 3 H maximum with 3-phase AC
line input.
Important – You must read these simplified instructions before proceeding. These instructions are to be
used as a reference only and are not intended to replace the details provided herein. You must read the
Safety Warning on, page 5, before proceeding.
see Section 5.2, on page 14.
Ground (Earth):
(Terminals L1, L2, L3)
see Section 5.1, on pages 13 – 14.
(Models KBAC-29, 45, 48):
50/60 Hz, AC Line Input
208/230, 400/460 Volt, 3-Phase,
(Terminals L1, L2)
see Section 5.1, on pages 13 – 14.
(Models KBAC-24D, 27D, 29):
50/60 Hz, AC Line Input
208/230 Volt, Single Phase,
3-Phase
see Section 5.3, on page 14.
AC Induction Motor:
AC LINEMOTOR
Motor
TB1
L2
L1V WUL3
FIGURE 1 – QUICK-START CO ECTIO DIAGRAM*
*Layout of Model KBAC-24D varies slightly.

Models BAC-45, 48: Designed to accept 3-phase (Terminals “L1”, “L2”, “L3”) AC line input only.
Rated for 400/460 Volt AC line input only. See Figure 8, on page 14.
1.2 AC LINE FUSING – t is recommended that a fuse(s) or circuit breaker be installed in the AC line.
Fuse each conductor that is not at ground potential. For the recommended fuse size, see Table 4, on
page 10. Also see Section 10, on page 21.
1.3 GROUND CONNECTION – Connect the ground wire (earth) to the ground screw, as shown in Figure
7, on page 13, and Figure 8, on page 14. See Section 5.2, on page 14.
1.4 MOTOR CONNECTION – Wire the motor to Terminal Block TB1 Terminals “U”, “V”, “W”, as shown in
Figure 7, on page 13, and Figure 8, on page 14. (Special reactors may be required for cable lengths
over 100 ft. (30 m) – consult our Sales Department.) See Section 5.3, on page 14.
1.5 60 Hz and 50 Hz MOTOR OPERATION – The drive is factory set for 60 Hz 3-phase motor operation
(Jumper J5 set to the “60Hz” position). For 50 Hz motor operation, set Jumper J5 to the “50Hz” posi-
tion. See Section 6.4, on page 17.
1.6 START/STOP SWITCH – The drive is supplied with a prewired Start/Stop Switch to electronically
“start” and “stop” the drive, as described in Section 5.5, on pages 14 – 15. This switch must be used
to “start” the drive each time the AC line is applied to the drive or to “restart” the drive. Also see
Section 6.8, on page 18.
1.7 JUMPER SETTINGS – All jumpers have been factory set for most applications, as shown in Figure 2,
on page 9. Some applications require setting of the jumpers in order to tailor the drive for a specific
requirement. See Section 6, on pages 16 – 18.
1.8 TRIMPOT SETTINGS – All trimpots have been factory set for most applications, as shown in Figure
2, on page 9. Some applications require adjustment of the trimpots in order to tailor the drive for a
specific requirement. See Section 12, on pages 22 – 25.
1.9 DIAGNOSTIC LEDs – After power has been applied, observe the LEDs to verify proper drive opera-
tion, as described in Section 11, on pages 21 – 22.
2 AFETY WARNING
Definition of Safety Warning Symbols
Electrical Hazard Warning Symbol – Failure to observe this warning could result in electrical
shock or electrocution.
Operational Hazard Warning Symbol – Failure to observe this warning could result in serious
injury or death.
5
This product should be installed and serviced by a qualified technician, electrician, or
electrical maintenance person familiar with its operation and the hazards involved. Proper
installation, which includes wiring, fusing or other current protection, and grounding can reduce the
chance of electrical shocks, and/or fires, in this product or products used with this product, such as
electric motors, switches, coils, solenoids, and/or relays. Do not use this drive in an explosion-proof
application. Eye protection must be worn and insulated adjustment tools must be used when working
with drive under power. This product is constructed of materials (plastics, metals, carbon, silicon, etc.)
which may be a potential hazard. Proper shielding, grounding, and filtering of this product can reduce
the emission of radio frequency interference (RFI) which may adversely affect sensitive electronic
equipment. It is the responsibility of the equipment manufacturer and individual installer to supply this
Safety Warning to the ultimate end user of this product. Be sure to follow all instructions carefully. Fire
and/or electrocution can result due to improper use of this product. (SW 1/2006)

6
3 INTRODUCTION
Thank you for purchasing the KBAC Adjustable Frequency Drive. KB Electronics, nc. is committed to
providing total customer satisfaction by producing quality products that are easy to install and operate. The
KBAC is manufactured with surface mount components incorporating advanced circuitry and technology.
The drives are variable speed controls housed in a rugged NEMA-4X / P-65 washdown and watertight
die-cast aluminum enclosure. They are designed to operate 208 – 230 and 400/460 Volt 50 & 60 Hz
3-phase AC induction motors from subfractional thru 5 HP. The sine wave coded Pulse Width Modulated
(PWM) output operates at a carrier frequency of 16 kHz which provides high motor efficiency and low noise.
Adjustable Linear Acceleration and Deceleration are provided, making the drive suitable for soft-start
applications.
Due to its user-friendly design, the KBAC AC drive is easy to install and operate. Tailoring to specific applica-
tions is accomplished with selectable jumpers and trimpots, which eliminate the computer-like programming
required on other drives. However, for most applications no adjustments are necessary. For more advanced
programming, PC based Drive-Link™ software is available.
Main features include adjustable RMS Current Limit and 2t Motor Overload Protection.* n addition, Adjustable
Slip Compensation with Static Auto-Tune and Boost provides high torque and excellent load regulation over a
wide speed range. Power Start™ delivers over 200% motor torque to ensure start-up of high frictional loads.
Electronic nrush Current Limit (E CL™) eliminates harmful AC line inrush current. A Run/Fault Relay is provid-
ed, which can be used to turn on or off equipment or to signal a warning if the drive is put into the Stop Mode
or if a fault has occurred. The drive is suitable for machine or variable torque (HVAC) applications. Also, a
jumper is provided for selection of Regenerative or DC njection Braking.
Standard front panel features include Diagnostic LEDs for “Power On” and “Drive Status”, a Start/Stop Switch,
and a Main Speed Potentiometer. Other features include a Barrier Terminal Block to facilitate wiring of the AC
line and motor, adjustable trimpots (M N, MAX, ACCEL, DECEL, COMP, CL, JOG, BOOST), customer selec-
table jumpers (Line Voltage (dual voltage models only), Motor Horsepower, Automatic Ride-Through / Manual
Start, Motor Frequency, Frequency Multiplier, Fixed/Adjustable Boost, Regenerative / njection Braking, “Run”
or “Fault” Output Relay Operation, NO/NC Stop Contact, Constant/Variable Torque, 2t Overload Selection).
Optional accessories include: Forward-Stop-Reverse Switch, On/Off AC Line Switch, Run-Stop-Jog Switch,
Signal solator, Auto/Manual Switch, Class ”A” AC Line Filter, Multi-Speed Board, Programming Kit, Modbus
Communication Module, and Liquidtight Fittings. A connector is provided for easy installation of accessories.
Custom software: all models can be factory programmed for applications which require special timing, PLC
functions, and GFC operation – contact our Sales Department.
*UL approved as an electronic overload protector for motors.
3.1 STANDARD FEATURES
• Industrial Duty Die-Cast Aluminum Case with Hinged Cover – Available in black finish or FDA
approved white finish.
• Simple to Operate – Does not require programming. Uses trimpots and jumpers, which are factory
set for most applications.
• Motor HP Selection Jumper – Allows the drive to be used on a wide range of motors without
recalibration.
• Diagnostic LEDs – Power on (POWER) and drive status (STATUS).
• Run/Fault Relay Output Contacts – Can be used to turn on or off equipment or to signal a
warning if the drive is put into the Stop Mode or a fault has occurred.
This product complies with all CE directives pertinent at the time of manufacture. Contact our Sales
Department for Declaration of Conformity. nstallation of a CE approved RF filter is required. See RF
Filters & Chokes Selection Guide D-321 (Part No. A42027) for selection of filters to meet the ndustrial or
Residential Standard. Additional shielded cable and/or AC line cables may be required along with a signal
isolator (S AC (Part No. 9600)).

• Start/Stop Switch – Provides electronic start and stop functions.
• Barrier Terminal Block – Facilitates wiring of motor, AC line, and Run/Fault Relay Output Contacts.
• Jumper Selection of Drive Output Frequency – ncreases the motor speed up to two times the
rated RPM.
• Ride-Through – Provides smooth recovery to the previous set speed during a momentary power
loss (of less than 2 seconds).
• Holding Torque at Zero Speed – Resists motor shaft rotation when the drive is in Stop Mode.
Note: GFCI Operation – This drive can operate with GFCIs (optional software required) – contact our
Sales Department.
3.2 PERFORMANCE FEATURES
• Power Start™ – Provides more than 200% starting torque which ensures startup of high frictional
loads.
• Slip Compensation with Static Auto-Tune and Boost – Provides excellent load regulation over a
wide speed range.
• Speed Range – 60:1
3.3 PROTECTION FEATURES
• Motor Overload (I2t) with RMS Current Limit* – Provides motor overload protection which pre-
vents motor burnout and eliminates nuisance trips.*
• Electronic Inrush Current Limit (EICL™) – Eliminates harmful nrush AC line current during startup.
• Short Circuit – Shuts down the drive if a short circuit occurs at the motor (phase-to-phase).
• Regeneration – Eliminates tripping due to high bus voltage caused by rapid deceleration of high
inertial loads.
• Undervoltage and Overvoltage – Shuts down the drive if the AC line input voltage goes above or
below the operating range.
• MOV Input Transient Suppression.
• Microcontroller Self Monitoring and Auto Reboot.
*UL approved as an electronic overload protector for motors.
3.4 TRIMPOT ADJUSTMENTS
• Minimum Speed (MIN) – Sets the minimum speed of the motor. See Section 12.1, on page 22.
• Maximum Speed (MAX) – Sets the maximum speed of the motor. See Section 12.2, on page 22.
• Acceleration (ACCEL) – Sets the amount of time for the motor to accelerate from zero speed to full
speed. See Section 12.3, on page 22.
• Deceleration (DECEL) – Sets the amount of time for the motor to decelerate from full speed to zero
speed. See Section 12.4, on page 23.
• DC Injection Brake (DECEL) – When the drive is set for DC njection Braking (Jumper J7 set to the
“ NJ” position), the DECEL trimpot is used to set the DC njection Brake voltage and time. See
Section 12.5, on page 23.
• Slip Compensation (COMP) – Maintains set motor speed under varying loads. See Section 12.6,
on page 23.
• Current Limit (CL) – Sets the current limit (overload) which limits the maximum current to the motor.
See Section 12.7, on page 24.
• Boost (BOOST) – Sets the amount of Boost which can be used to obtain maximum low speed per-
formance. See Section 12.8, on pages 24 – 25.
• Jog (JOG) – Sets the “jog” speed of the motor. Must be used with the optional Run-Stop-Jog
Switch Kit (Part No. 9340). See Section 12.9, on page 25. 7

8
Description1
PC Board
Designation KBAC-24D KBAC-27D KBAC-29 KBAC-45 KBAC-48
AC Line Input Voltage (115, 230) J1 3 3 ———
Motor Horsepower (see Table 4 - Electrical Ratings, on page 10) J2 3 3 3 3 3
Automatic Ride-Through or Manual Restart (A*, M) J3 3 3 3 3 3
Frequency Multiplier (1X, 2X) J4 3 3 3 3 3
Motor Frequency (50Hz, 60Hz) J5 3 3 3 3 3
Fixed or Adjustable Boost (FIX, ADJ) J6 3 3 3 3 3
Regenerative or DC Injection Braking (RG, INJ) J7 3 3 3 3 3
“Run” or “Fault” Output Relay Operation (R, F) J8 3 3 3 3 3
Normally Open or Closed Stop Contact ( O, NC) J9 3 3 3 3 3
Constant or Variable Torque (VT, CT) J10 3 3 3 3 3
I2t Overload Selection (1, 2) J11 3 3 3 3 3
TABLE 1 – JUMPER SELECTABLE FEATURES
TABLE 2 – OPTIO AL ACCESSORIES
Notes: 1. Bold indicates factory setting. 2. In Automatic Ride-Through Mode, the drive will automatically restart due to a momentary power loss of less
than 2 seconds.
Notes: 1. Complies with CE Council Directive 89/336/EEC Industrial Standard. 2. If a USB communication cable is required, purchase Part o. 19008.
3. Other protocols available – contact our Sales Department.
Description
Model
KBAC-24D
Model
KBAC-27D
Model
KBAC-29
Model
KBAC-45
Model
KBAC-48
Forward-Stop-Reverse Switch – Provides motor reversing and stop functions.
Mounts on the enclosure cover and is supplied with a switch seal to maintain
liquidtight integrity.
9480 9480 9480 9480 9480
On/Off AC Line Switch – Disconnects the AC line. Mounts on the enclosure
cover and is supplied with a switch seal to maintain liquidtight integrity. 9482 9523 9532 9532 9532
Run-Stop-Jog Switch – Selects speed setting from either the Main Speed
Potentiometer or the JOG Trimpot. Mounts on the enclosure cover and is supplied
with a switch seal to maintain liquidtight integrity.
9340 9340 9340 9340 9340
Signal Isolator – Provides isolation between a non-isolated signal source and the
drive. Mounts on the drive’s PC board with four snap-ins. 9600* 9600* 9600* 9600* 9600*
Auto/Manual Switch – When used with the Signal Isolator, it selects remote
process signal or the Main Speed Potentiometer. Mounts on the enclosure cover
and is supplied with a switch seal to maintain liquidtight integrity.
9481 9481 9481 9481 9481
AC Line Filter1– Provides Class A RFI (EMI) suppression.
Installs onto the drive’s PC board with quick-connect terminals.
Suffix “S”: Filter is used when On/Off AC Line Switch is installed.
Suffix “NS”: Filter is used when On/Off AC Line Switch is not installed.
Suffix “S” 9516 9512 9479 9479 9479
Suffix “NS” 9507 9512 9515 9515 9515
Multi-Speed Board – Provides multi-speed operation using external contacts or a
PLC. Mounts on the drive’s PC board with four snap-ins. 9489 9489 9489 — —
Programming Kit 2 –Includes DownLoad Module™ (DLM) handheld programming
device which uploads and downloads drive programs, PC to DLM serial communica-
tion cable, DLM to drive communication cable, and PC Windows® based Drive-
Link™ communication software.
9582 9582 9582 9582 9582
Modbus Communication Module – Allows direct communication between drive
and Modbus3protocol. 9517 9517 9517 9517 9517
Liquidtight Fittings – Provide a liquidtight seal for wiring the drive. it includes
three 1/2” and one 3/4” liquidtight fittings 9526 9526 9526 9526 9526
* Warning! t is highly recommended that the Signal solator (Part No. 9600) be installed when using the
drive with external control signals.

Output Contacts:
Run/Fault Relay
Start/Stop Switch:
Main Speed Potentiometer:
Diagnostic LEDs:
J4: 1X or up to 2X
J9: Normally Open or ClosedJ11: I t Overload selection.
CON1: Used to connect optional accessories to the drive.
Stop Contact selection. Torque selection. J10: Constant or Variable
J7: Regenerative or Output Relay Operation selection. Injection Braking selection. J8: "Run" or "Fault" J6: Fixed or Adjustable Boost selection. Rated Motor RPM Operation selection. Motor Operation selection. J5: 60 Hz or 50 Hz
All jumpers and trimpots are shown in factory set positions.
J1: AC Line Input Voltage selection J2: Motor Horsepower selection
3
.
(Models KBAC-24D, 27D only). J3: Automatic Ride-Through
4
or Manual Start selection. Used with optional Run-Stop-Jog Switch Kit. Adjustable Trimpots
2
.
JOG Terminal. See Section 6.6, on page 18. See Section 6.7, on page 18. See Section 6.4, on page 17. See Section 6.4, on page 17. See Section 6.5, on page 18. See Section 6.1, on pages 16 – 17. See Section 6.2, on page 17. See Section 6.3, on page 17. See Section 12, on pages 22 – 25. See Table 2, on page 8.
2
see Section 5.5,
see Section 5.9,
on page 16.
on pages 14 – 15.
Normally Closed
Red
Normally Open
Relay Common
see Section 5.4, on page 14.
Black
White
See Section 6.10, on page 18. See Table 2, on page 8.
See Section 6.8, on page 18. See Section 6.9, on page 18.
White (Low) (P1)
Violet (High) (P3)
Orange (Wiper) (P2)
see Section 11, on pages 21 – 22.
STATUS POWER
STOP
NCNO COM FWDCOM RUN REV COM
CON2
JOGP1P3 P2 ACCELMINMAX JOGCLDECEL BOOST
TB2
MA
J3
2X
J4
50Hz
J5
60Hz 1X
J8J9
NCNO F
J11 J10
CT21 VT
CON1
FIX
J6
RGR INJ
J7
ADJ
A
J2
E C D B
COMP
9
FIGURE 2 – CO TROL LAYOUT 1
Notes: 1. Layout of Model KBAC-24D varies slightly. 2. On Model KBAC-24D, the JOG and COMP Trimpots are located vertically, along the right edge of the PC board (below the mounting screw). 3. On Model KBAC-24D, Jumper J2 is labeled “1”, “3/4”, “1/2”, “1/4”, “1/8” (factory set to the “1” position). On Model KBAC-27D, Jumper J2 is labeled “2”, “11⁄2”, “1”, “3/4”, “1/2” (factory set to the “11⁄2” position). On Models KBAC-29, 45, 48, Jumper J2 is labeled “A”, “B”,
“C”, “D”, “E” (factory set according to Table 4, on page 10. 4. On Model KBAC-24D, Jumper J3 is labeled “AUTO” and “MA ”.

A B C D E
10
Description Specification Factory Setting
115 Volt AC Line Input Voltage Operating Range (Volts AC) 115 (±15%) —
208/230 Volt AC Line Input Voltage Operating Range (Volts AC) 208 (-15%) / 230 (+15%) —
400/460 Volt AC Line Input Voltage Operating Range (Volts AC) 380 (-15%) – 460 (+15%) —
Maximum Load (% Current Overload for 2 Minutes) 150 —
Carrier, Switching Frequency (kHz) 16, 8 —
Signal Following Input Voltage Range1(Volts DC) 0 – 5 —
Output Frequency Resolution (Bits, Hz) 10, .06 —
Minimum Speed Trimpot (MIN) Range (% Frequency Setting) 0 – 40 0
Maximum Speed Trimpot (MAX) Range (% Frequency Setting) 70 – 110 100
Acceleration Trimpot (ACCEL) and Deceleration Trimpot (DECEL) Range (Seconds) .3 – 20 1.5
Boost Trimpot (BOOST) Range (Volts/Hz) 0 – 30 5
Slip Compensation Trimpot (COMP) Range at Drive Rating (Volts/Hz) 0 – 3 1.5
Current Limit Trimpot (CL) Range (% Full Load) 40 – 200 160
Jog Trimpot (JOG) Range (% Frequency Setting) 0 – 100 35
Motor Frequency Setting (Hz) (Jumper J5) 50, 60 60
Output Frequency Multiplier (1X, 2X) (Jumper J4) 21, 2 1
Minimum Operating Frequency at Motor (Hz) 1 —
Speed Range (Ratio) 60:1 —
Speed Regulation (30:1 Speed Range, 0 – Full Load) (% Base Speed) 32.5 —
Overload Protector Trip Time for Stalled Motor (Seconds) 6 —
Undervoltage/Overvoltage Trip Points for 115 Volt AC Line Input (± 5%) (Volts AC)476 – 141 —
Undervoltage/Overvoltage Trip Points for 208/230 Volt AC Line Input (± 5%) (Volts AC)4151 – 282 —
Undervoltage/Overvoltage Trip Points for 400/460 Volt AC Line Input (± 5%) (Volts AC)4302 – 567 —
Run/Fault Relay Output Contact Rating (Amps at 30 Volts DC, 125 Volts AC, 250 Volts AC) 1, 0.5, 0.25 —
Operating Temperature Range (°C / °F) 0 – 45 / 32 – 113 —
TABLE 3 – GE ERAL PERFORMA CE SPECIFICATIO S
TABLE 4 – ELECTRICAL RATI GS
Notes: 1. Requires an isolated signal. If a non-isolated signal is used, or if using 0 to ±2.5 thru 0 to ±25 Volts DC, or 4 – 20 mA DC signal input,
install the SIAC Signal Isolator (Part o. 9600). 2. Allows the motor to operate up to two times the rated RPM. Constant horsepower will result when
operating the drive in the “X2” mode above the motor rated frequency. 3. Dependent on motor performance. 4. Do not operate the drive outside the
specified AC line input voltage operating range.
Model o.
Part o.
AC Line Input Fuse or
Circuit
Breaker
Rating
(Amps)
Drive Output
Motor Horsepower
Selection2
(Jumper J2)
et Wt.
Volts AC
(50/60 Hz)
Phase
(φ)
Maximum
Current
(Amps AC)
Voltage
Range
( ominal)
(Volts AC)
Maximum
Continuous
Load Current
(RMS Amps/Phase)
Maximum
Horsepower
(HP (kW))Black White1lbs kg
BAC-24D 9987 9988 115 1 16 20 0 – 230 3.6 1 (.75) 13/4 1/2 1/4 1/8 5.9 2.7
208/230 1 10 15 0 – 230
BAC-27D 9520 9521 115 1 22 25 0 – 230 5.5 11⁄2(1.13) —
11⁄241 3/4 1/2 10.3 4.7
208/230 1 15 20 0 – 230 6.7 2 (1.5) 24
BAC-29 9528 9529 208/230 1 15 20 0 – 230 6.7 2 (1.5) —
2511⁄21 3/4 10.3 4.7
3 10.8 15 0 – 230 9.0 3 (2.25) 35
BAC-4539530 9531 400/460 3 5.3 10 0 – 400/460 4.6 3 (2.25) 32 11⁄21 3/4 10.3 4.7
BAC-4839540 9541 400/460 3 9.6 10 0 – 400/460 8.3 5 (3.75) 53 2 11⁄21 10.3 4.7
Notes: 1. White FDA approved finish. 2. Bold indicates factory setting. Jumper J2 on Model KBAC-24D is labeled “1”, “3/4”, “1/2”, “1/4”, “1/8” (facto-
ry set to the “1” position). Jumper J2 on Model KBAC-27D is labeled “2”, “11⁄2”, “1”, “3/4”, “1/2” (factory set to the “11⁄2” position). Jumper J2 on
Models KBAC-29, 45, 48 is labeled “A”, “B”, “C”, “D”, “E” (factory set according to the table). 3. Models KBAC-45, 48 are rated 0 – 400 Volts AC for
50 Hz motor operation and 0 – 460 Volts AC for 60 Hz motor operation. 4. Model KBAC-27D is rated 11⁄2HP maximum with 115 Volt AC line input and
2 HP maximum with 208/230 Volt AC line input. 5. Model KBAC-29 is rated 2 HP maximum with single-phase AC line input and 3 HP maximum with
3-phase AC line input.

0.31 7.97
5.86
Maximum Depth:
149
8.20 9.53
208 242
2.53 64.4
0.25
8.85
225
6.4
4* 1* 2* 3*
5.51
129
5.06
140
2X ∅
11
FIGURE 3 – MODEL KBAC-24D MECHA ICAL SPECIFICATIO S (I CHES/mm) FIGURE 4 – MODELS KBAC-27D, 29, 45, 48 MECHA ICAL SPECIFICATIO S (I CHES/mm)
Contains 2 mounting holes for standard 1/2” liquidtight fittings
* Tighten these screws, in the sequence shown, to 12 in-lbs (14 kg-cm).
* Tighten these screws, in the sequence shown, to 12 in-lbs (14 kg-cm).
Contains 2 mounting holes for standard 1/2” liquidtight fittings and 1 mounting hole for standard 3/4” liquidtight fitting.
0.30 7.37
2X2X 25.4
2X 77.7
1.00 3.05
7.55
192
7.15
181
7.25
184
2X
6.4
8.50
216
0.25
9.80
249
9.25
235
4X ∅
Maximum Depth:
4* 1* 2* 3*

12
4 IMPORTANT APPLICATION INFORMATION
4.1 MOTOR WITH EXTERNAL FAN COOLING – Most totally enclosed fan-cooled (TEFC) and open ven-
tilated 3-phase AC induction motors will overheat if used beyond a limited speed range at full torque.
Therefore, it is necessary to reduce motor load as speed is decreased.
Note: Some fan-cooled motors can be used over a wider speed range. Consult the motor
manufacturer for details.
WARNING! Some motors have low speed characteristics which cause overheating and winding
failure under light load or no load conditions. f the motor is operated in this manner for an
extended period of time, it is recommended that the unloaded motor current be checked from
2 – 15 Hz (60 – 450 RPM) to ensure motor current does not exceed the nameplate rating. Do not
use motor if the motor current exceeds the nameplate rating.
It is recommended that the drive be used with Inverter Duty or TENV motors.
nverter duty and most totally
enclosed non-ventilated (TENV)
motors can provide full rated torque
over an extended speed range
without overheating. See Figure 5.
f external fan cooling is provided,
open ventilated motors can also
achieve an extended speed range at
full rated torque. A box fan or blower
with a minimum of 100 CFM per HP
is recommended. Mount the fan or
blower so the motor is surrounded
by the airflow. See Figure 6.
4.2 ELECTRONIC MOTOR OVERLOAD
PROTECTION – The drive contains
Modified 2t Overload Protection.*
Part of this function consists of a
Current Limit (CL) circuit, which limits
the drive current to a factory preset
level of 160% of the rated drive
current. The CL Trimpot is used to
recalibrate the drive current from
60% thru 200%. The Power Start™
circuit provides an overshoot function
that allows most motors to develop
more than 200% of starting torque and breakdown torque.
Standard 2t is undesirable because it causes nuisance tripping. t allows a very high motor current to
develop and will turn the drive off after a short period of time. KB’s RMS Current Limit Circuit avoids
this nuisance tripping while providing maximum motor protection.
f the motor is overloaded to 120% of full load (75% of the CL setting), the 2t Timer starts. f the
motor continues to be overloaded at the 120% level, the timer will shut down the drive after 30
minutes. f the motor is overloaded to 160% of full load, the drive will trip in 6 seconds.
*UL approved as an overload protector for motors.
FIGURE 5 – MAXIMUM ALLOWED MOTOR TORQUE VS. SPEED
FIGURE 6 – OPE VE TILATED MOTOR WITH EXTER AL FA COOLI G
Motors
and TENV
Inverter Duty
Maximum Allowed
Motor Torque (%)
TEFC and Open Ventilated
Motors
Fan Cooled
10060708050304010020 90
Motor Speed (%)
40
0
20
60
80
100
Open Ventilated Motor
Fan or Blower
(100 CFM Min.
per HP)
Airflow

5.1 AC LINE INPUT CONNECTION – Wire
the AC line input to Terminal Block TB1.
GFCI Operation – Do not connect
this drive to an AC power source
controlled by a Ground Fault Circuit
Interrupter. Special software is avail-
able for GFCI operation – contact
our Sales Department.
Note: The rated AC line voltage of the
drive must match the actual AC line
input voltage. On Models KBAC-24D,
27D, the setting of Jumper J1 must
match the AC line input voltage.
Models BAC-24D, 27D: Designed to
accept single-phase (Terminals “L1”, “L2”) AC line input only. Rated for 208/230 Volt AC line input with
Jumper J1 set to the “230V” position (factory setting). Rated for 115 Volt AC line input with Jumper J1
set to the “115V” position. See Figure 7.
5 WIRING IN TRUCTION
WARNING! Read Safety Warning, on page 5, before using the drive. Disconnect main
power before making connections to the drive. To avoid electric shock, be sure to
properly ground the drive. It is highly recommended that the SIAC Signal Isolator (Part No. 9600)
be installed when using signal following.
WARNING! Remote connections of potentiometer, switches, etc., will have wiring that is at line
potential. It is required that the signal isolator be installed for remote connections.
Application Note – To avoid erratic operation, do not bundle the AC line and motor wires with each
other or with wires from signal following, start/stop contacts, or any other signal wires. Also, do not
bundle motor wires from multiple drives in the same conduit. Use shielded cables on all signal wiring
over 12” (30 cm). The shield should be earth grounded on the drive side only. Wire the drive in
accordance with the National Electrical Code requirements and other local codes that may apply.
Be sure to properly fuse each AC line conductor that is not at ground potential. Do not fuse neutral
or grounded conductors. A separate AC line switch or contactor must be wired as a disconnect so
that each ungrounded conductor is opened. For fuse or circuit breaker selection, see Table 5. Also
see Section 10, on page 21.
To maintain the watertight integrity of the drive, be sure to use suitable watertight connectors and
wiring which are appropriate for the application. Model BAC-24D contains two mounting holes for
standard 1/2” liquidtight fittings (not supplied) (one watertight plug is provided, if only one knockout
is used). Models BAC-27D, 29, 45, 48 contain two mounting holes for standard 1/2” liquidtight
fittings (not supplied) and one mounting hole for standard 3/4” liquidtight fitting (not supplied) (two
watertight plugs are provided, if only one knockout is used).
The drive is designed with a hinged case so that when the front cover is open, all wiring stays intact.
To open the cover, the four screws must be loosened so they are no longer engaged in the case
bottom. After mounting and wiring, close the cover making sure that the wires do not get caught or
crimped as the cover is closed. Tighten the four screws so that the gasket is slightly compressed.
The recommended tightening torque is 12 in-lbs (14 kg-cm). See Figures 3 and 4, on page 11, for the
tightening sequence. Do not overtighten.
13
Terminal Block Description Model
Maximum Wire Size (Cu) Recommended Tightening Torque
AWG mm2in-lbs kg-cm
TB1 AC Line Input and Motor Wiring BAC-24D 12 3.3 7 8
BAC-27D, 29, 45, 48 12 3.3 12 14
TB2 Run/Fault Relay Output Contacts All 16 1.3 3.5 3
TABLE 5 – TERMI AL BLOCK WIRI G I FORMATIO
FIGURE 7 – MODELS KBAC- 24D, 27D*
AC LI E I PUT, MOTOR, A D GROU D CO ECTIO S
AC LINEMOTOR
Motor
VUW
AC Line Input
115, 208/230 Volt
Single-Phase Ground (Earth)
L1 L2
TB1
*Model KBAC-27D is rated 11⁄2HP maximum with 115 Volt AC line input and 2
HP maximum with 208/230 Volt AC line input.

14
Model BAC-29: Designed to accept single-phase (Terminals “L1”, “L2”) or 3-phase (Terminals “L1”,
“L2”, “L3”) AC line input. Rated for 208/230 Volt AC line input only. See Figure 8.
Models BAC-45, 48: Designed to accept 3-phase (Terminals “L1”, “L2”, “L3”) AC line input only.
Rated for 400/460 Volt AC line input only. See Figure 8.
5.2 GROUND CONNECTION – Connect the ground wire (earth) to the Green Ground Screw. The Ground
Screw is located next to Terminal Block TB1. See Figure 7, on page 13, and Figure 8.
5.3 MOTOR CONNECTION – Wire the motor to Terminal Block TB1 Terminals “U”, “V”, “W”. See Figure
7, on page 13, and Figure 8. Motor cable length should not exceed 100 ft (30 m) – special reactors
may be required – consult our Sales Department.
Be sure Jumper J2 is set to the corresponding motor horsepower rating, as described in Section 6.2,
on page 17.
5.4 REMOTE MAIN SPEED POTENTIOMETER
CONNECTION – The drive is supplied with a
prewired Main Speed Potentiometer mounted
on the front cover.
To operate the drive from a remote poten-
tiometer (5 kΩ), remove the white, orange,
and violet potentiometer leads from Terminals
“P1”, “P2”, and “P3”. The wires may be taped
and left inside the drive. The potentiometer
assembly may be removed if a watertight seal
is used to cover the hole in the front cover.
Wire the Main Speed Potentiometer to
Terminals “P1” (low side), “P2” (wiper), and “P3” (high side). See Figure 9.
WARNING! Do not earth ground any Main Speed Potentiometer terminals.
Application Note – f it is required that the Remote Main Speed Potentiometer be isolated from the
AC line, install the S AC Signal solator (Part No. 9600).
5.5 REMOTE START/STOP SWITCH CONNECTION – The drive is supplied with a prewired Start/Stop
Switch mounted on the front cover to electronically start and stop the drive.
To operate the drive from a remote Start/Stop Switch (type (ON)-OFF-ON, SPDT), remove the white,
black, and red wires from Terminals “RUN”, “COM”, and “STOP”. The wires may be taped and left
FIGURE 8 – MODELS KBAC-29*, 45, 48 AC LI E I PUT, MOTOR, A D GROU D CO ECTIO S
to Terminals "L1", "L2", as shown below.
Model KBAC-29 Only
Wire the single-phase AC line input
208/230 Volt
AC Line Input
Single-Phase, 50/60 Hz Ground (Earth)
L3L2L1
AC LINE
Ground (Earth)3-Phase, 50/60 Hz
208/230, 400/460 Volt
Motor
AC Line Input
WU V
MOTOR
TB1
L1 L3L2
AC LINE
*Model KBAC-29 is rated 2 HP maximum with single-phase AC line input and 3 HP maximum with 3-phase AC line input.
FIGURE 9 – REMOTE MAI SPEED
POTE TIOMETER CO ECTIO
Main Speed
Potentiometer
Orange (Wiper)
Violet (High)
White (Low)
P1P2P3

inside the drive. The switch assembly may be
removed if a liquidtight seal is used to cover
the hole in the front cover. After applying
power to the drive, momentarily set the
Start/Stop switch to the “START” position.
For Start/Stop Switch with normally open stop
contact, set Jumper J9 to the “NO” position
(factory setting). For Start/Stop Switch with
normally closed stop contact, set Jumper J9
to the “NC” position. See Figures 10 and 11.
Also see Section 6.8, on page 18.
5.6 AUTOMATIC RESTART – Automatic
restart requires the elimination of the
Start/Stop Switch. Remove the white,
black, and red wires from Terminals
“RUN”, “COM”, and “STOP”. The wires
may be taped and left inside the drive.
The switch assembly may be removed if
a liquidtight seal is used to cover the hole
in the front cover.
To eliminate the start/stop function, hard-
wire Terminals ”RUN” and “COM” with the jumper
that is provided. Be sure Jumper J9 is set to the
“NO” position. See Figure 12.
WARNING! Using a jumper to eliminate the
start/stop function will cause the motor to
run at the Main Speed Potentiometer setting when
the AC line is applied.
5.7 VOLTAGE FOLLOWING CONNECTION – An isolat-
ed* 0 – 5 Volt DC analog signal input can also be
used to control motor speed in lieu
of the Main Speed Potentiometer.
The drive output will linearly follow
the analog signal input. Wire the sig-
nal input positive lead (+) to Terminal
“P2” and the negative lead (-) to
Terminal “P1”. With external circuitry,
a 0 – 10 Volt DC analog signal can
also be used. See Figure 13.
*If a non-isolated signal is used,
install the SIAC Signal Isolator ( art No. 9600). The SIAC accepts voltage (0 to ±2.5 thru 0 to ±25
Volts DC) or current (4 – 20 mA DC) signal inputs. See Table 2, on page 8.
Note: For signal following operation, the Minimum Speed Trimpot (MIN) must be set fully counter-
clockwise.
WARNING! The signal input must be isolated from the AC line. Earth grounding signal
wiring will damage the drive and void the warranty. It is highly recommended that the
SIAC Signal Isolator (Part No. 9600) be installed when using signal following.
5.8 ENABLE CIRCUIT CONNECTION – The drive can also be started and stopped with an Enable circuit
(close to run, open to stop). See Figure 14, on page 16. 15
FIGURE 10 – REMOTE START/STOP SWITCH CO ECTIO
WITH ORMALLY OPE STOP CO TACT
(J9 Installed in “NO” Position)
COM
Black
STOP
STOP
Red
START
RUN
White
NO
J9
NC
FIGURE 12 – START/STOP FU CTIO ELIMI ATED
(TERMI ALS HARDWIRED) (JUMPER I STALLED)
(J9 INSTALLED IN “NO” POSITION)
COMSTOP RUN
NO
J9
NC
FIGURE 11 – REMOTE START/STOP SWITCH CO ECTIO
WITH ORMALLY CLOSED STOP CO TACT
(J9 INSTALLED IN “NC” POSITION)
COM
(Push to Stop)
Normally Closed
Momentary Contact
STOP
STOP
Normally Open
Momentary Contact
(Push to Start)
RUN
START
NO
J9
NC
FIGURE 13 – VOLTAGE FOLLOWI G CO ECTIO S (ISOLATED)
0 – 5
Volts DC
P2P3P1
V
-
+
0 – 10
Volts DC
P2P3P1
10k V
10k
-
+

16
The Enable function is established by
wiring a switch or contact in series with
the orange Main Speed Potentiometer
lead which connects to Terminal “P2”.
When the Enable Switch is closed, the
motor will accelerate to the Main
Speed Potentiometer setting. When
the Enable Switch is opened, the
motor will decelerate to stop.
WARNING! If the Enable
Switch is to be mounted
remotely, it is highly recommended
that the SIAC Signal Isolator
(Part No. 9600) be installed.
5.9 Run/Fault Relay Connection – The Run/Fault
Relay Output Contacts are located at TB2 and
can be used to turn on or off equipment or to
signal a warning if the drive is put into the Stop
Mode or a fault has occurred. See Figure 15.
The Run/Fault Relay Contact status for various
drive operating conditions is shown in Table 6.
FIGURE 14 – E ABLE CIRCUIT CO ECTIO
Main Speed
Potentiometer
Enable Switch or Relay
Orange (Wiper)
Violet (High)
White (Low) (Close to Run)
P1P2P3
FIGURE 15 – RU /FAULT RELAY OUTPUT
CO TACTS CO ECTIO
Output Contacts
Run/Fault Relay
Normally Closed
Relay Common
Normally Open
NCNO
TB2
COM
6 SETTING SELECTABLE JUMPERS
The drive has customer selectable
jumpers which must be set before
the drive can be used. For the
location of jumpers, see Figure 2,
on page 9.
Note: Disconnect the AC line
efore changing position of
jumpers.
6.1 LINE INPUT VOLTAGE
SELECTION (J1 (MODELS
BAC-24D, 27D ONLY)) –
Jumper J1 is factory installed
on Terminal “230V” for 208/230 Volt AC line input. For 115 Volt AC line input, the jumper must be
removed and installed on Terminal “115V”. See Figure 16.
Drive
Operating
Condition Description
Run Relay Operation
(Jumper J8 Installed in “R” Position)
(Factory Setting)
Fault Relay Operation
(Jumper J8 Installed in “F” Position)
ormally
Open Contact
ormally
Closed Contact
ormally
Open Contact
ormally
Closed Contact
Power Off Main Power Disconnected Open Closed Open Closed
Run Mode* Normal Drive Operation Closed Open Closed Open
Stop Mode* Selected by Operator Open Closed Closed Open
Fault** Drive Tripped Open Closed Open Closed
TABLE 6 – DRIVE OPERATI G CO DITIO A D RU /FAULT RELAY CO TACT STATUS
*Run Mode or Stop Mode is selected using the Start/Stop Switch. **Overload, I2t, Short Circuit, Undervoltage, Overvoltage.
FIGURE 16 – MODELS KBAC-24D*, 27D AC LI E I PUT VOLTAGE SELECTIO
208/230 Volt AC Line Input
(Factory Setting)
(J1 Installed on Terminal “230V”)
115 Volt AC Line Input
(J1 Installed on Terminal “115V”)
115V
J1
230V
J1
115V 230V
*Layout of Model KBAC-24D varies slightly.

Using pliers, gently rock the female terminal back and forth
while pulling it upward. See Figure 17
6.2 MOTOR HORSEPOWER SELECTION (J2) – Set Jumper J2
to the corresponding position for the motor being used.
See Figure 18.
6.3 AUTOMATIC RIDE-THROUGH OR MANUAL START
SELECTION (J3)* – Jumper J3 is factory set to the “A” posi-
tion for Automatic Ride-Through. f the power is interrupted
for up to 2 seconds, the drive will shut down and then
“ride-through” and automatically return to the set frequency.
f Jumper J3 is set to the “M” position, the drive will have to
be manually restarted for a momentary power loss using the Start/Stop Switch. See Figure 19. Also
see Section 11.2, on page 22, for the Status (ST) LED indication.
*On Model KBAC-24D, Jumper J3 is labeled “AUTO” and “MAN”.
6.4 60 Hz AND 50 Hz MOTOR
OPERATION AND DRIVE
OUTPUT FREQUENCY
SELECTION (J4 AND J5) –
Both jumpers must be set for the
appropriate motor nameplate
frequency rating.
6.4.1 SETTING THE DRIVE
FOR 60 Hz OR 50 Hz
MOTOR OPERATION –
The drive is factory set to
operate 60 Hz motors.
Jumper J4 is factory set to
the “1X” position and
Jumper J5 is factory set to the
“60Hz” position. For 50 Hz motors,
set Jumper J5 to the “50Hz” posi-
tion, and be sure Jumper J4 is set to
the “1X” position. See Figure 20.
6.4.2 SETTING THE DRIVE FOR TWO
TIMES THE RATED MOTOR RPM –
The drive can also be used to oper-
ate the motor up to two times the
rated RPM. However, constant
horsepower will result when operat-
ing the drive in the “2X” mode
above the motor rated frequen-
cy. See Figure 21, on page 18.
For 120 Hz output with 60 Hz
motor, set Jumper J4 to the
“2X” position and be sure
Jumper J5 is set to the “60Hz”
position. For 100 Hz output with
50 Hz motor, set Jumper J4 to
the “2X” position and set
Jumper J5 to the “50Hz” position. See Figure 22, on page 18.
17
FIGURE 17 – REMOVI G JUMPER J1
O MODELS KBAC-24D, 27D
FIGURE 18 – MOTOR HORSEPOWER SELECTIO
Terminal
Installed
Removed
Terminal
FIGURE 19 – AUTOMATIC RIDE-THROUGH
OR MA UAL START SELECTIO *
Automatic Ride-Through
(Factory Setting)
(J3 Installed in “A” Position)
Manual Start
(J3 Installed in “M” Position)
A
J3
M
A
J3
M
J2
KBAC-24D KBAC-27D
12**
3/4 11⁄2**
1/2 1
1/4 3/4
1/8 1/2
KBAC-29* KBAC-45* KBAC-48*
3*** 3 5
2*** 2 3
11⁄211⁄22
1 1 11⁄2
3/4 3/4 1
A
B
C
D
E
The factory setting is shown in bold.
*Jumper J2 on Models KBAC-29, 45, 48 is labeled “A”, “B”, “C”, “D”, “E”. **Model
KBAC-27D is rated 11⁄2HP maximum with 115 Volt AC line input and 2 HP maximum
with 208/230 Volt AC line input. ***Model KBAC-29 is rated 2 HP maximum with
single-phase AC line input and 3 HP maximum with 3-phase AC line input.
FIGURE 20 – 60 Hz & 50 Hz MOTOR SELECTIO
60 Hz Motor Operation
(Factory Setting)
(J4 Installed in “1X” Position)
(J5 Installed in “60Hz” Position)
50 Hz Motor Operation
(J4 Installed in “1X” Position)
(J5 Installed in “50Hz” Position)
2X
J4
1X
50Hz
J5
60Hz
2X
J4
1X
50Hz
J5
60Hz
*On Model KBAC-24D, Jumper J3 is labeled “AUTO” and “MA ”.

18
6.5 BOOST MODE SELECTION (J6) –
Jumper J6 is factory set to the “F X”
position for Fixed Boost. For
Adjustable Boost using the BOOST
Trimpot, set Jumper J6 to the “ADJ”
position. See Figure 23. Also see
Section 12.8, on pages 24 – 25, for
the BOOST Trimpot range.
6.6 BRA ING MODE SELECTION (J7) –
Jumper J7 is factory set to the “RG”
position for Regenerative Braking when
the Start/Stop Switch is set to the
“STOP” position. For DC njection
Braking, set Jumper J7 to the “ NJ”
position. See Figure 24. Also see
Section 12.5, on page 23.
When the njection Brake Mode is
selected, the DECEL Trimpot is used
to adjust the brake time and intensity.
6.7 RUN/FAULT OUTPUT RELAY
OPERATION SELECTION (J8) –
Jumper J8 is factory set to the “R”
position for “Run” operation of the
Run/Fault Relay. For “Fault” operation
of the Run/Fault Relay, set Jumper J8
to the “F” position. See Figure 25, on
page 19.
For Run/Fault Relay output contacts,
see Section 5.8, on pages 15 – 16.
The Run/Fault Relay contact status for
various drive operating conditions is
shown in Table 6, on page 16.
6.8 STOP CONTACT SELECTION (J9) –
Jumper J9 is factory set to the “NO”
position for a normally open stop
contact. For remote normally closed
stop contact, set Jumper J9 to the
“NC” position. See Figure 26, on
page 19. For wiring information, see
Section 5.5, on pages 14 – 15.
6.9 TORQUE MODE SELECTION (J10) –
Jumper J10 is factory set to the “CT”
position for Constant Torque Mode,
which is desirable for most machine
applications. For Variable Torque
Mode, used for HVAC and fan
applications, set Jumper J10 to the “VT” position. See Figure 27, on page 19.
6.10 I2t OVERLOAD SELECTION (J11) – Jumper J11 is factory set to the “1” position for nverter Duty
Rated Motors. For Non nverter Duty Rated Motors and HVAC applications, set Jumper J11 to the “2”
position. See Figure 28, on page 19. Also see Section 12.7, on page 24.
FIGURE 22
120 HZ& 100 HZDRIVE OUTPUT FREQUE CY SELECTIO
120 Hz Output with 60 Hz Motor
(J4 Installed in “2X” Position)
(J5 Installed in “60Hz” Position)
100 Hz Output with 50 Hz Motor
(J4 Installed in “2X” Position)
(J5 Installed in “50Hz” Position)
2X
J4
1X
50Hz
J5
60Hz
2X
J4
1X
50Hz
J5
60Hz
FIGURE 21 – AVAILABLE TORQUE VS. OUTPUT FREQUE CY
50/60
Output Frequency (Hz)
0
20
% Torque
50
100/120
100
FIGURE 23 – FIXED OR ADJUSTABLE BOOST SELECTIO
Fixed Boost
(Factory Setting)
(J6 Installed in “FIX” Position)
Adjustable Boost
(J6 Installed in “ADJ” Position)
ADJ
J6
FIX
ADJ
J6
FIX
FIGURE 24 – REGE ERATIVE OR DC I JECTIO BRAKI G SELECTIO
Regenerative Braking
(Factory Setting)
(J7 Installed in “RG” Position)
DC Injection Braking
(J7 Installed in “INJ” Position)
INJ
J7
RG
INJ
J7
RG

7 MOUNTING IN TRUCTION
t is recommended that the drive be mounted
vertically on a flat surface with adequate
ventilation. Leave enough room below the
drive to allow for AC line, motor connections,
and any other wiring that is required.
Although the drive is designed for outdoor
and washdown use, care should be taken to
avoid extreme hazardous locations where
physical damage can occur. When mounting
the drive in an enclosure, the enclosure
should be large enough to allow for proper
heat dissipation so that the ambient temper-
ature does not exceed 45 °C (113 °F) at full
rating. See Figures 3 and 4, on page 11.
WARNING! Do not use this drive in
an explosion-proof application.
8 RECOMMENDED HIGH VOLTAGE
DIELECTRIC WITH TAND TE TING
(HI-POT TE TING)
Testing agencies such as UL, CSA, VDE,
etc., usually require that equipment undergo
a hi-pot test. n order to prevent catastrophic
damage to the drive which has been installed
in the equipment, the following procedure
is recommended. A typical hi-pot test setup
is shown in Figure 29, on page 20. All drives
have been factory hi-pot tested in accor-
dance with UL requirements.
WARNING! All equipment AC line
inputs must be disconnected
from the AC power.
8.1 Connect all equipment AC power input
lines together and connect them to the
H.V. lead of the hi-pot tester. Connect
the RETURN lead of the hi-pot tester
to the frame on which the drive and
other auxiliary equipment are mounted.
8.2 The hi-pot tester must have an
automatic ramp-up to the test voltage and an automatic ramp-down to zero voltage.
Note: f the hi-pot tester does not have automatic ramping, then the hi-pot output must be manually
increased to the test voltage and then manually reduced to zero. This procedure must be followed for
each machine to be tested. A suggested hi-pot tester is Slaughter Model 2550.
CAUTION! nstantly applying the hi-pot voltage will cause irreversible damage to the drive, which will
void the warranty.
19
FIGURE 25 – “RU ” OR “FAULT”
OUTPUT RELAY OPERATIO SELECTIO
“Run” Output Relay Operation
(Factory Setting)
(J8 Installed in “R” Position)
“Fault” Output Relay Operation
(J8 Installed in “F” Position)
F
J8
R
F
J8
R
FIGURE 26 – ORMALLY OPE
OR CLOSED STOP CO TACT SELECTIO
ormally Open Stop Contact
(Factory Setting)
(J9 Installed in “NO” Position)
ormally Closed Stop Contact
(J9 Installed in “NC” Position)
NO
J9
NC
NO
J9
NC
FIGURE 27 – CO STA T OR VARIABLE TORQUE SELECTIO
Constant Torque
(Factory Setting)
(J10 Installed in “CT” Position)
Variable Torque
(J10 Installed in “VT” Position)
VT
J10
CT
VT
J10
CT
FIGURE 28 – I2t OVERLOAD SELECTIO
Inverter Duty Rated Motor
(Factory Setting)
(J11 Installed in “1” Position)
on Inverter Duty Rated
Motor Operation
(J11 Installed in “2” Position)
1
J11
2
1
J11
2

20
Chassis
P3
Chassis
Machine Equipment or Frame
Adjustable Frequency Drive
(Main Power Disconnected)
to AC Line Inputs
Connect Hi-Pot
L2 L1
P2 P1
Auxiliary Equipment
L3 Signal Inputs L2
H. V.
AC Line Input
MAX
ZERO
L1
RESET
RETURN
10mA0mA
VOLTAGETEST
AC KILOVOLTS
LEAKAGE
1
0 3
2
High Voltage Dielectric Withstand Tester (Hi-Pot Tester)
Motor Wires
W
V
Frame
Connect All Drive Terminals Together
U
(Main Power Disconnected)
FIGURE 29 – TYPICAL HI-POT TEST SETUP