Glentek Inc. 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322-3026
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GA369 MANUAL
2.2.7 EXAMPLE
-
MODEL NUMBERING:
The following example of GA369 part numbering, is provided to help you better understand Glentek’s part
numbering system:
Example: GA369CMA-4A-3
In this example, the GA369 part number describes the following amplifier configuration:
CM
=
Current Mode input option A Type A + and
-
Limit option.
-4A
=
4 Axes chassis -3
=
3 Amplifier modules installed.
For this example each of the three amplifier modules would be labeled GA369-1 or GA369-1 with serial
number and CMA designator at bottom of label. The 4 axes chassis would be labeled GA369-4A-3 with serial
number and CMA designator at bottom of label.
2.3 PROTECTION CIRCUITS:
The following protection circuits are integral to the GA369 amplifiers to prevent damage to the amplifier and your
equipment. Again, Glentek is anxious to work with you in helping to implement any circuit functions your system might
require.
Note: For 2.3.1 to 2.3.3 refer to Appendix B, drawing 369-1007.
2.3.1 DRIVE INHIBIT INDICATOR OPERATION (RED LED):
The LED 1 Drive Inhibit indicator light will turn ON and latch for the two following conditions:
1. Low Speed Electronic Circuit Breaker (LS/ECB) triggered.
2. High Speed Electronic Circuit Breaker (HS/ECB) triggered.
2.3.2 LOW SPEED ELECTRONIC CIRCUIT BREAKER:
This circuit protects the motor, amplifier and mechanical system from damage due to excessive mechanical
bind in the system or possibly driving into a hard mechanical stop. Circuit operation is as follows:
When the motor current exceeds the value set at TP1, typically 3.0 VDC (scale factor 1 VOLT=2 AMPS), IQ3-1
switches positive and voltage on C5 begins integrating up. If the current remains above the set point, typically
0.5 seconds, Q9 will trigger the ECB latch and the Drive Inhibited indicator.
2.3.3 HIGH SPEED ELECTRONIC CIRCUIT BREAKER:
This circuit protects the amplifier from dead shorts across the amplifier output terminals. The HS/ECB is always
factory set and should not be adjusted. The typical factory setting is 29 Amps for 10 micro seconds. Again, this
circuit triggers the ECB latch and the Drive Inhibited indicator.
2.4 SPECIFICATIONS:
The specifications for each GA369 amplifier module is as follows:
2.4.1 OUTPUT POWER
OUTPUT CURRENT (PEAK): ±12 AMPS
OUTPUT CURRENT (RMS): ±6 AMPS
DC BUSS VOLTAGE: +37OVDC
(Higher and lower Buss Voltages available, consult Glentek.)
Note: DC Buss voltage should be selected approximately 10%-20% above the maximum voltage required
at motor terminals for maximum system efficiency.
2.4.2 INPUT POWER:
INPUT POWER FOR DC BUSS: A fused single or three phase full wave rectifier and filter capacitor are
provided on the base plate. The AC input to this circuit is supplied by a separately mounted power transformer
unique to the application. The power transformer and motor output inductors are not standard parts of the
amplifier package. Glentek has power transformers and inductors in stock for your system requirements.
CHAPTER 2: DESCRIPTION, FEATURES AND SPECIFICATIONS
