3-5

MN1373

Figure 3-4 Voltage Input Signal Connections

a. Connect the armature of the leader motor to the BC145 input terminals “5” (-) and “7” (+).

b. Set the armature voltage of the leader motor to zero (0). Adjust the “MIN” trimpot so that the output at terminals “9” (-) and “10” (+)

reads zero (0) volts.

c. Reset the armature voltage of the leader motor to 90V. Adjust the “MAX” trimpot to the desired output voltage.

Note: (1) When setting the output voltage using the “MIN” and “MAX” trimpots, the voltage or speed of the driven motor can be read directly

instead of using the output of the BC145.

(2) When readjusting the “MIN” and “MAX” trimpots, always set the minimum voltage first and then the maximum voltage.

(3) Trimpots allow approximately 20 turns for the full range of adjustment. If during the adjustment procedure the output stops changing,

try reversing the direction of rotation of trimpot.