3 INTRODUCTION
Thank you for purchasing the KBDA Adjustable Frequency Drive. KB Electronics, Inc. is committed to
providing total customer satisfaction by producing quality products that are easy to install and operate.
The KBDA Adjustable Frequency Drives are variable speed controls housed in a rugged NEMA-4X /
IP-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 provides high motor efficiency and low noise. Adjustable
Linear Acceleration and Deceleration make the drive suitable for soft-start applications.
Due to its user-friendly design, the KBDA is easy to install and operate. Setting the drive to specific appli-
cations is accomplished using the Multi-Function Keypad, which provides easy operation and
programming of the drive. To facilitate programming, all similar functions are presented in common
groups. For more advanced programming, PC based Drive-Link™ software is available.
The 4-Digit LED Display provides readout of drive operating parameters and programming functions and
displays Output Frequency, Motor RPM, Output Current, Output Voltage, Bus Voltage, Function Codes
and Values, Fault Codes, and Custom Units. In addition to operating the drive, the Multi-Function Keypad
is used to change drive operating parameters, reprogram functions, and change the display output. The
LEDs provide indication of the drive’s status and operating mode (Hz, PGM, LCL/REM, STOP, FWD,
REV, OL, JOG/REM).
The optional IODA Input/Output Multi-Function Board provides a variety of functions, which include pre-
set frequency, up/down frequency control, signal isolation, isolated output voltage for controlling auxiliary
devices, open collector outputs, and output relay contacts. See Appendix A, on pages 42 – 54. See
Function Groups 7 – 9, on pages 36 – 38.
Main Features – Adjustable RMS Current Limit and I
2
t Motor Overload Protection.* Flux Vector
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 startup of high frictional
loads. Programmable Injection Braking provides rapid motor stop. Electronic Inrush Current Limit
(EICL™) eliminates harmful AC line inrush current, which allows the drive to be line switched. A Multi-
Function Output Relay is provided, which can be used to turn on or off equipment or to signal a warning
if the drive is put into various modes of operation. Models KBDA-29**, 45, 48 also contain AC Line
Phase Loss Detection. The drive is suitable for machine or variable torque (HVAC) applications.
*UL approved as an electronic overload protector for motors.
**When used on 3-phase AC line input set for 7.0 Amps or higher (3 HP (2.25 kW)).
Standard Front Panel Features – 4-Digit LED Display, Multi-Function Keypad, Status Indicator LEDs,
and a Main Speed Potentiometer.
Optional Accessories – On/Off AC Line Switch, Class “A” AC Line Filter, IODA Input/Output Multi-
Function Board, Programming Kit, DIAC Modbus Communication Module, and Liquidtight Fittings. See
Table 1, on page 9.
3.1 STANDARD FEATURES
• Industrial Duty Die-Cast Aluminum Enclosure with Hinged Cover – Available in dark gray
finish or FDA approved white finish.
• Multi-Function Keypad – The keys are used to operate the drive, change operating parame-
ters, reprogram functions, and change the display output (Run/Stop, Forward/Reverse, Up,
Down, Shift/Reset, Jog-Local/Remote, Program/Display, Read/Enter).
• 4-Digit LED Display – Provides readout of drive operating parameters and programming func-
tions. Displays Output Frequency, Motor RPM, Output Current, Output Voltage, Bus Voltage,
Function No. Codes and Values, Fault Codes, and Custom Units.
7
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