“The Right Control for Your Application.”
12095 NW 39 Street, Coral Springs, FL 33065-2516
KB Electronics, Inc.
Phone: 954-346-4900; Fax: 954-346-3377
(A40288) - Rev. E - 6/6/2005 - Z3562E00
Page 13 of 20
Figure 16
AC Line Input, Motor, and Ground Connections
9.2
Ground Connection: Connect the ground wire (earth) to the green ground screw. The ground screw is located on the heat sink.
See
Figure 16, on page XX
.
Note: Model KBVF-21D, due to its double insulated design, does not contain a ground screw.
9.3
Motor Connection: Wire the motor to Terminals "U", "V", "W". The terminals are located on the upper PC board. See
Figure 16,
on page XX
. Motor cable length should not exceed 100 ft (30 m) – special reactors may be required – consult our Sales
Department.
Note: The drive is programmed to operate 3-phase AC induction motors. For PSC motors, optional software is required – contact our Sales
Department.
9.4
Main Speed Potentiometer Connection: The drive is supplied with a 5 k Main Speed Potentiometer to control motor speed.
Wire the Main Speed Potentiometer to Terminals "P1" (low), "P2" (wiper), "P3" (high). The terminals are located on the lower PC
board. See
Figure 17, on page XX
.
WARNING! Do not earth ground any Main Speed Potentiometer terminals.
Figure 17
Main Speed Potentiometer Connection
Note: When mounting the Main Speed Potentiometer, be sure to
install the insulating disc (supplied)between the potentiometer and
the panel.
9.5
Voltage Following Connection: An isolated* 0 - 5 Volt DC analog signal input can be used to control motor speed in lieu of the
Main Speed Potentiometer. The drive output will linearly follow the analog signal input. Connect the signal input positive lead (+) to
Terminal "P2" and the negative lead (-) to Terminal "P1". The terminals are located on the lower PC board. With external circuitry,
a 0 - 10 Volt DC analog signal can also be used. See
Figure 18, on page XX
.
* If a non-isolated signal is used, install the SIVFR - Signal Isolator (Part No. 9597). The SIVFR accepts voltage (0 to ±2.5 thru 0 to ±25 Volts DC) or
current (4 - 20 mA DC) signal inputs. See
Section 3.5, on page XX
.
Note: For signal following operation, the Minimum Speed Trimpot (MIN) must be set fully counterclockwise.
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 recommended that the SIVFR - Signal Isolator and Run/Fault Relay (Part No. 9597) be installed
when using signal following.
