HX7+ ASD Installation and Operation Manual 21
Installation and Connections
The HX7+ Adjustable Speed Drive 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 L1/R, L2/S, and L3/T terminals). The control terminals of the ASD may be
used by connecting the terminals of the Terminal Board (P/N 48570) to the proper sensors or signal
input sources (see the section titled
I/O and Control on pg. 28 and Figure 8 on pg. 32).
Note: The optional ASD-Multicom boards may be used to expand the I/O functionality of
the ASD. See the section titled
HX7+ ASD Optional Devices on pg. 234 for more
information on the available options.
The output terminals of the ASD (T1/U, T2/V, and T3/W) must be connected to the motor that is to be
controlled (see
Figure 20 on pg. 38).
As a minimum, the installation of the ASD shall conform to Article 110 of the NEC, the Occupational
Safety and Health Administration requirements, and to any other local and regional industry codes
and standards.
The Startup Wizard assists with the initial configuration of the HX7+ ASD. The Startup Wizard
maybe launched from the
Program menu or may be configured to start automatically upon subsequent
start ups. See the section titled Startup Wizard on pg. 44 for additional information on the Startup
Wizard.
Installation Notes
Do Not apply commercial power to the output terminals T1/U, T2/V, or T3/W.
If an output contactor is used for bypass operation, it must be interlocked such that commercial power is
never applied to the output terminals of the ASD (T1/U, T2/V, or T3/W).
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 – CC connection is disconnected before the output contactor is opened.
Do Not open 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.
Disconnect the ASD from the motor before megging or applying a bypass voltage to the motor.
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.
On some devices the ST-to-CC connection is further enhanced by the operation of the MS1 AUX relay
circuit. The MS1 AUX relay circuit is normally open and closes the ST-to-CC connection (via ST1)
only after normal system power is available. The MS1 AUX relay circuit prohibits the ST-to-CC
connection in the event that the MS1 contactor fails to close during start up or if MS1 opens while the
ASD is running. This feature is available on the 75 HP and above systems.
To Next Page
Loading...
