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6.7 J7 – Signal Input Voltage – The output of this
control is normally controlled with the main speed
adjust potentiometer. However, an isolated analog
voltage may also be used in place of a potentiometer.
The control can be scaled for either a 0-5VDC or 0-
10VDC by placing J7 in the appropriate position "5V"
or "10V". The scaling can be further adjusted with the
"Max" trimpot. See Figure 21, and Section 4.7, on
page 19 for wiring information.
Note: If an Isolated input signal is not available an
accessory Signal Isolator Model BC145 can be
installed. The BC154 / BCWD140 accepts a wide range of signal voltage and current.
An Installation Kit (BC158) containing Auto/Man Switch and required connections are
also available.
7
START-UP AND ADJUSTMENT
WARNING! READ SAFETY NOTICE ON PAGE 11 BEFORE ATTEMPTING TO
OPERATE THE CONTROL OR SEVERE INJURY OR DEATH CAN RESULT. FAILURE TO
FOLLOW THE SAFETY NOTICE, MAY RESULT IN ELECTRIC SHOCK, FIRE OR EXPLOSION.
Once the control has been set up properly with the jumpers set to the desired positions, and the
electrical connections have been completed, apply AC power. Observe the "ON" LED and the
"STOP" LED indicators are illuminated. Before starting, be sure the main speed adjust potentiometer
is fully CCW.
7.1 Verify Correct Direction of Motor Rotation.
WARNING! BE PREPARED TO STOP THE DRIVE WITH THE STOP SWITCH OR
BY DISCONNECTING THE AC POWER IF MOTOR DIRECTION IS INCORRECT. IF A
TACHOMETER IS CONNECTED AND THE TACHOMETER FEEDBACK SIGNAL POLARITY
IS REVERSED, THE MOTOR MAY ACCELERATE TO A HIGH RATE OF SPEED. FAILURE TO
OBSERVE THIS WARNING MAY RESULT IN EQUIPMENT DAMAGE OR BODILY INJURY.
To start the control, move the START/STOP switch to the "START" position and release.
The "STOP" LED should extinguish and the motor should rotate as the potentiometer knob is
rotated clockwise. Verify the motor shaft is rotating in the desired "forward" direction. If the
direction of rotation is wrong, stop the drive and disconnect AC power. Switch the A1 and A2
motor leads. If a tachometer is connected, the leads may also need to be switched for
correct signal polarity.
7.2 TRIMPOT ADJUSTMENTS
The control contains trimpots which have been factory adjusted for most applications. Figure
3, on page 14, 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 3, on page 6, for range and factory setting of all
trimpots. Re-adjust trimpots as follows:
29
FIGURE 21 - J7 JUMPER
POSITION
10V
J7
5V
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