User Guide

D. Unidirectional Potentiometer Operation (Reverse) – Uses a potentiometer to vary

motor speed. See figure 11B on page 13. Connect the 5K potentiometer to TB1 ter-

minals marked “SIG” (wiper of potentiometer), “-15V” (high side of potentiometer),

and “COM” (low side of potentiometer). Use the potentiometer to vary motor speed

and the switching device to select motor direction. If the motor is not running in the

desired direction, either reconnect the high side of the potentiometer to TB1 terminal

marked “+15V” or reverse the motor leads.

E. Bidirectional Potentiometer Operation – Uses a potentiometer to vary motor

speed and direction. See figure 11C on page 13. Connect the 5K potentiometer to

TB1 terminals marked “SIG” (wiper of potentiometer), “+15V” (high side of poten-

tiometer), and “-15V” (low side of potentiometer). Use the potentiometer to vary

motor speed and direction.

When the potentiometer is in the center position, the control output can be set to

zero, using the OFFSET trimpot. Rotating the trimpot clockwise will cause the motor

to rotate in the forward direction. Rotating the potentiometer counterclockwise will

cause the motor to rotate in the reverse direction.

F. Unidirectional Potentiometer with Reversing Contacts – Uses a potentiometer to

vary motor speed. See figure 11D on page 13. Connect the 5K potentiometer to TB1

terminals marked “SIG” (wiper of potentiometer), “+15V” (high side of potentiometer),

and “COM” (low side of potentiometer). Use the potentiometer to vary motor speed

and the switching device to select motor direction. When the potentiometer is set to

0% (fully counterclockwise), the motor will operate at the minimum set speed (set by

the OFFSET trimpot on the SIMG). When the potentiometer is set to 100% (fully

clockwise) the motor will operate at full speed (set by the MAX trimpot on the SIMG).