Graham 176B1111, Instruction Manual

Page: 19 / 38

18
WIRING
1 . Refer to Ratings Chart (pg 8) for incoming line current and
fuse rating. It is the responsibility of the user or person
installing the controller to provide branch circuit protection
according to NEC and local codes. On controllers using 120
VAC input, be sure the incoming hot lead is connected to L1
and common is connected to L2.
2 . A full wave field is provided for use with shunt wound motors
when required. Field voltage on 120 VAC line is 100 VDC. If
the motor requires a 50VDC (half wave) field voltage,
connect field windings from F1 to L1. Field voltage on 240
VAC line is 200 VDC. If the motor requires a 100 VDC filed,
follow the procedure outline above.
3 . Refer to Ratings Chart (pg 8) for appropriate Current Sense
Resistor size that is needed, depending upon the horsepower
of motor to be used.
4 . A speed potentiometer is available for use with each
controller and is rated at 5k ohm, 1W.
5 . An isolated process signal may be used instead of a
potentiometer by connecting signal leads between terminals
SP2 and A1, with positive to SP2. The S1000 is factory set
to follow a 0-5VDC signal. By removing Jumper J2, a O-
10VDC signal may be used. Jumper J2 is a 22ohm: i/4 watt
resistor located next to SP2 and SP3 terminals on the S1000
circuit board. BE SURE THAT SIGNAL IS ISOLATED FROM
GROUND, OR CONTROL WILL BE DAMAGED.
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