14 ACE-tronics G9 ASD Installation and Operation Manual
Installation and Connections
The ACE-tronics G9 ASD may be set up initially by performing a few simple configuration settings. To 
operate properly, the ASD must be securely mounted and connected to a power source (3-phase AC 
input at the R/L1, S/L2, and T/L3 terminals). The control terminals of the ASD may be used by 
connecting the terminals of the ACE G9-120V-PCB to the proper sensors or signal input sources (see 
the section titled ACE G9-120V-PCB on pg. 21
 and 
Figure 8 on pg. 24).
System performance may be further enhanced by assigning a function to the output terminals of the 
ACE G9-120V-PCB and connecting the terminals to the proper indicators or actuators (LEDs, relays, 
contactors, etc.).
Note: T
he optional ACE-tronics G9 ASD interface boards may be used to expand the I/O 
functionality of the ASD.
Installation Notes
When a brake-equipped motor is connected to the ASD, it is possible that the brake may not release at 
startup because of insufficient voltage. To avoid this, DO NOT connect the brake or the brake contactor 
to the output of the ASD.
If an output contactor is used for bypass operation, it must be interlocked such that commercial power is 
ne
ver applied to the output terminals of the ASD (U/T1, V/T2, and W/T3).
DO NOT apply commercial power to the ASD output terminals U/T1, V/T2, and W/T3.
Though the default settings of the ASD do not include the use of a physical discrete input terminal being 
programmed to the ST function, the system may be configured to use a physical discrete input terminal 
set to ST. When configured properly, the externally-activated ST terminal acts as a permissive in 
allowing for normal system operation. See parameter F110 for more information on the use of the ST 
terminal.
If a secondary magnetic contactor (MC
) is used between the output of the ASD and the motor, it should 
be interlocked such that the ST terminal activation is deactivated before the output contactor is opened.
DO NOT ope
n and then close a secondary magnetic contactor between the ASD and the motor unless 
the ASD is off and the motor is not rotating.
Note: Re-application of power via a secondary contact while the ASD is on or while the 
motor is still turning may cause ASD damage.
The ASD input voltage should remain within 10% of the specified input voltage range. Input voltages 
approaching the upper or lower limit settings may require that the over-voltage and under-voltage stall 
protection level parameters be adjusted. Voltages outside of the permissible tolerance should be 
avoided.
The frequency of the input power should be ±2 Hz of the specified input frequency.
DO NOT us
e an ASD with a motor that has a power rating higher than the rated output of the ASD.
The ACE-tronics G9 ASD is designed to operate NEMA B motors. Consult with the ACE World 
Companies Customer Support Center before using the ASD for special applications such as with an 
explosion-proof motor or applications with a piston load.
Disconnect the ASD from the motor before megging or applying a bypass voltage to the motor.
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