Glentek Inc. 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322-3026
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Application Guide
How to Choose the Correct Amplifier
Glentek produces a wide range of amplifiers. Some amplifiers have built in DC power supplies, referred
to as “Stand Alone”, while others are referred to as a module that requires customers to furnish DC
power supply. Glentek also offers 2 and 4 axis packages with power supply for multi-axis systems.
If the applications requires a NEMA 23, 34 or 42 motor, Glentek recommends using the SMB/SMC
9715 or SMB/SMC 9808 amplifiers. The SMB/SMC 9715 is a DC module amplifier primarily used for
multi axis systems. If it becomes necessary, the digital servo amplifiers can be configured to run either
brushless or brush type motors. However, Glentek does not recommend using a brush type motor if it
is possible. For more information on Glentek amplifiers, refer to installation and operation manual
(24AUG07) at the Glentek website.
The SMB amplifier has buss derived logic power, which means that you only need to provide buss
power to the amplifier to operate the digital logic board. However, in case of buss power removal or
failure, the digital logic board would not be able to keep track of the position of the motor shaft, and any
fault data would be lost. For this reason, the SMC amplifiers have an external “Keep Alive” logic power
source. This source can either be 5VDC, 24VDC or 110VAC depending on the model. Again, having
the “Keep Alive” power source allows the amplifier to keep track of all the digital data. Since the data is
not lost, the customers would not have to restart the machine at the “home” position i.e. if a machine
happened to lose buss power in the middle of a job once buss power was restored it would allow the
amplifier to continue and finish the job.
For detail model numbering, please refer to our installation and operation manual (24Aug07), pages
69-85.
