Initial Start-Up
S4 Application Manual Section 2
Page 5
2 Initial start up of the drive system
This section will describe how to initially start up the COMBIVERT S4 drive system. This
process should be done before attempting to adjust the drive for a specific type of
application.
2.1 Verifying connections to the amplifier
Supply voltage connections
The 3 phase 230VAC or 480VAC supply voltage should be connected to terminals L1, L2,
and L3. If the input voltage is 230V single phase, the connection should be made to
terminals L1 and L2.
Compare the rated input voltage listed on the nameplate of the S4 to the line
voltage connected to the power terminals L1, L2, and L3. They should be the
same. Connecting 480V supply voltage to a 230V amplifier will result in destruction
of the unit.
Motor connections
Use the motor power cable supplied by KEBCO to connect the output of the amplifier to
the motor. One end of the cable has a military style connector on it. Screw this
connector all the way on to the motor power receptacle (will have either 6 or 8 pins and is
the one closest to the motor shaft).
The other end of this cable has bare wires, which are connected to the amplifier. The
wires are numbered 1 through 8. Wire #4 is the green and yellow ground wire. This
green and yellow wire along with the shield of the cable should be connected to the
ground terminal on the amplifier. Connect wire #1 to power terminal U, wire #2 to power
terminal V, wire #3 to power terminal W, wire #7 to the first OH terminal, and wire #8 to
the second OH terminal.
As an option, the servo motors can be supplied with an internal power off brake. Wires 5
and 6 provide the connection to the brake. These wires must be connected to an external
24VDC regulated power supply. These wires should not be connected to any terminal on
the amplifier.
Regen resistor connections
In most applications some type of regen resistor will be required. This resistor should be
connected to the PA and PB power terminals. Long leads between the amplifier and the
resistor should always be twisted and shielded.
Resolver and encoder connections
Use the feedback cable as supplied by KEBCO to connect the resolver on the motor to
the amplifier. The 12 pole military style connector should be threaded all the way on the
receptacle on the motor. The high density 15 pin DB connector should be connected to
the 15 pin DB connector on the amplifier.
Avoid cutting the cable.
Once the internal
shields of the cable are broken the system becomes much more susceptible to noise.
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