KB Electronics KBMK-24DF - Manual (Page 6)

6
3 INTRODUCTION
Thank you for purchasing the KBMK 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 KBMK Adjustable Frequency Drives are variable speed controls housed in a rugged NEMA-1 / IP-40
enclosure. They are designed to operate 208 – 230 Volt 50 & 60 Hz 3-phase AC induction motors from 1/8 HP
thru 1 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.
Model KBMK-24DF contains a built-in AC line Class A RFI (EMI) filter which meets the CE Council Directive
89/336/EEC Industrial Requirement.
Due to its user-friendly design, the KBMK is easy to install and operate. Setting the drive to specific
applications 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.
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 preset
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 30 – 49. See Function Groups
0 – 10, on pages 22 – 28.
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.
The drive is suitable for machine or variable torque (HVAC) applications.
Standard Front Panel Features: 4-Digit LED Display, Multi-Function Keypad, Status Indicator LEDs, and a
Built-In Speed Potentiometer.
Optional Accessories: Optional accessories include an On/Off AC Line Switch and IODA Input/Output Multi-
Function Board. See Table 1, on page 7.
*UL approved as an electronic overload protector for motors.
3.1 STANDARD FEATURES
▪ Multi-Function Keypad: The keys are used to operate the drive, change operating parameters,
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 functions.
Displays Output Frequency, Motor RPM, Output Current, Output Voltage, Bus Voltage, Function
Codes and Values, Fault Codes, and Custom Units.
▪ LED Status Indicators: The LEDs provide indication of the drive’s status and operating mode (Hz,
PGM, LCL/REM, STOP, FWD, REV, OL, JOG/REM).
▪ Multi-Function Output Relay Contacts: Can be used to turn on or off equipment or to signal a
warning if the drive is put into various modes of operation. (The optional IODA Input/Output Multi-
Function Board contains 9 digital and analog inputs, 4 digital and analog outputs, and 2 additional
relay outputs.)
▪ Motor Current Selection: Programmable motor current allows the drive to be used on a wide range
of motor horsepower.
▪ Compatible with most GFCIs. See Function No. 0.04, on page 22.