kb-electronics kbwd-15 Manuel D’Utilisation

FIG. 8 – TACHOMETER

CONNECTION

iii. Microprocessor Input – An isolated PWM signal from a microprocessor can be used to operate the

control. The output frequency should be 200 Hz or greater and should be derived from an

optocoupler with a transistor or operational amplifier signal output. (See fig. 7)

FIG. 5 – REMOTE

POTENTIOMETER CONNECTION

FIG. 6 – ANALOG

VOLTAGE CONNECTION

FIG. 7 – MICROPROCESSOR

CONNECTION

DC TACHOMETER INPUT.

If tachometer feedback is required, an analog tach signal must be

connected to terminal block TB3. Note: For tachometer feedback,

Jumper J1 must be set for the proper tach voltage, and the IR

COMP must be set to minimum (CCW) position. Connect the

tachometer so that when the motor rotates, the positive tach

voltage lead is connected to T+ and the negative tach lead is

connected to T-. (See fig. 8.)
Note: If the tach voltage is connected backwards, the control will drive

the motor at full speed only.
NOTE: Use the "7V" position for tachometer with 7 volts per 1000 RPM

and the "50V" position for tachometer with 50 volts per 1000 RPM.

(Set IR Comp to minimum for tach feedback.)

ARMATURE

FEEDBACK

TACH

7V/1000 RPM

TACH

50V/1000 RPM

FIG. 9 – INHIBIT

CIRCUIT WIRING

VI. INHIBIT

The control can be electronically stopped and started with the Inhibit circuit. To

"Stop" the control, terminals I1 & I2 must be shorted via a contact. The control

can be restarted by opening the contact.
Note: The Inhibit should not be used as a safety disconnect. Use only the

AC line for that purpose. (See fig. 9, p. 10)

Note: The Inhibit Circuit is not isolated. Do not earth ground inhibit leads.

VII. OPERATION

WARNING! Read Safety Warning on page 1 before attempting to

operate the control or severe injury or electrocution can result.

After the control has been set up properly and the wiring has been completed, the

start-up procedure can begin. If AC power has been properly connected to the control, the "ON" LED

indicator will illuminate. Before starting, be sure the main potentiometer is in the minimum position. To start

the control, the potentiometer knob should be rotated clockwise; the motor should begin to rotate.
Note: If the motor rotates in the incorrect direction, it will be necessary to disconnect the main AC

power and reverse the armature wires.

VIII. TRIMPOT ADJUSTMENTS

The control contains trimpots which have been factory adjusted for most applications. Figure 1, p. 4

illustrates the location of the trimpots and their approximate adjustment positions. Some applications may

require readjustment of the trimpots in order to tailor the control to exact requirements. (See table 1, p. 3

for range and factory setting of all trimpots.) Readjust trimpots as follows:

WARNING. Do not adjust trimpots with main power on if possible. If adjustments are

made with power on, insulated adjustment tools must be used and safety glasses must be

worn. High voltage exists in this control. Electrocution and/or fire can result if caution is

not

exercised. Safety warning on page 1 must be read and understood before proceeding.

A. Minimum Speed (MIN) — The MIN trimpot is used to set the minimum voltage of the drive. This sets

the minimum speed of the motor. Adjust the MIN trimpot as follows:
1. Rotate Main Potentiometer to minimum speed position (full counterclockwise).
2. Increase setting of MIN trimpot so that motor runs at desired minimum speed.