GLENTEK Inc. 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322-3026
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5.3 AMPLIFIER CONNECTIONS AND FUNCTIONS:
5.3.1 120 VAC 50/60 Hz FOR FANS AND LOW-VOLTAGE POWER SUPPLY:
Connect the 120VAC to terminals 1 and 2 of terminal barrier-strip TB102 located on the amplifier.
DO NOT APPLY ANY POWER YET.
5.3.2 INPUT FROM SECONDARY OF POWER TRANSFORMER:
The AC voltage that is used to form the DC bus of the amplifier package, is supplied from a separately
mounted transformer that has been selected by Glentek for your application. Connect the secondary of the
power transformer to input terminals 1, 2, & 3 of TB103.
DO NOT APPLY ANY POWER YET.
5.3.3 MOTOR:
The
motor is connected to terminals 1 (-) and 2 (+) of terminal strip TB101 of the amplifier module. In
most cases, if the motor inductance is less than 1 millihenry, an inductor should be connected in series with
the motor leads. The inductor is considered to be a separate part from the amplifier package. Glentek can
advise on the inductor specifications, and most styles and sizes are in stock at Glentek.
IT IS IMPERATIVE THAT YOU DO NOT USE GROUNDED TEST EQUIPMENT ON
THE MOTOR ARMATURE NOR CONNECT EITHER END OF THE MOTOR ARMATURE
TO SIGNAL GROUND OR DC BUS RETURN.
5.3.4 SIGNAL INPUT:
The amplifier has two Signal Inputs, one single-ended (Signal Input TB201-3) and one differential
(Auxiliary Signal Input TB201-1 and Auxiliary Return TB201-2). Typically, when operating in the velocity
mode, the input signal range is ± 10 VDC. The input voltage is summed with a precision DC tachometer to
provide accurate velocity control at the servo motor shaft (see fig. 4.1). The Signal Gain potentiometer R12,
and Auxiliary Gain potentiometer, R13, adjust the motor velocity desired for a given input voltage velocity
command.
5.3.5 TACHOMETER INPUT:
The Tachometer is connected to terminals 5 and 6 of terminal strip TB201 of the Control card (see 5.2
for recommended wire type & size).
5.3.6 CURRENT SENSE:
The Current Sense output signal can be monitored at TB201-7 of the Control card. It is an isolated out-
put signal that is proportional to motor current. The scale factor is 1 volt = 15 amps on the GA4571PR2,
GA4576PR2, and GA4581PR2, and 1 volt = 25A for the GA4582PR2.
5.3.7
+ AND
-
LIMITS:
The +
and - Limits are located respectively at terminals 8 and 9 of terminal strip TB201 of the Control
card. Please refer to 2.2.3 for a description of the different configurations of limits that are available. Ampli-
fier modules are normally shipped with type “A” limits which means that when terminal TB201-8 or TB201-
9 is pulled to common by some external circuit, the amplifier is inhibited in the +
or - direction.
CHAPTER FIVE: INSTALLATION PROCEDURE
