BOOK0795-F
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a. External DC Signal Follower - The controller will operate with an external 0 - 5 VDC, 0 - 10 VDC,
or 4 - 20 mA speed reference signal. The signal may be grounded or not grounded, isolated or not iso-
lated. Motor speed will be proportional to the signal.
0 - 5 VDC - Place S3-4 in OFF (Open) position, and connect the signal to TB2-6.
0 - 10 VDC - Place S3-4 and S3-6 in ON (Closed) position, and connect the signal to TB2-2.
4 - 20 mA - Place S3-4 in ON (Closed) position, and connect the signal to TB2-6 (+) and TB2-5 (-). To
use the MIN SPD potentiometer as a 4 mA offset adjustment, place S3-6 in OFF (Open) position, and
jumper TB2-1 to TB2-3.
b. Line Starting - By placing S3-7 in OFF (Open) position, the ‘anti-restart’ feature will be disabled, and
the controller may be started and stopped with an external AC line contactor. In addition, a wire
jumper must be connected between TB2-8 and TB2-9. If full speed operation is desired, connect
another wire jumper between TB2-2 and TB2-3.
c. Tachometer Feedback - To select tachometer feedback with armature feedback backup, place S3-2
and S3-3 in OFF (Open) position, and connect the tachometer generator signal to TB2-7 (-) and TB2-5
(+). Select the tachometer generator voltage range with S3-1, as follows:
8 VDC - 30 VDC at maximum speed, place S3-1 in ON (Closed) position.
31 VDC - 175 VDC at maximum speed, place S3-1 in OFF (Open) position.
d. Torque Regulator - The controller will function as a torque regulator when S3-5 is set to OFF (Open)
position. This allows an external potentiometer to set maximum motor torque (0 - 150% of rated).
12. STATUS INDICATOR - A bicolor LED glows red when motor armature current is being limited by the
controller current limit, and glows green when armature current is not being limited.
13. VOLTAGE TRANSIENT PROTECTION - A metal oxide suppressor (varistor) across the AC line is
combined with RC snubbers across the power bridge to limit potentially damaging high voltage spikes
from the AC power source.
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