INSTALLATION—CONTROL PANEL INSTALLATION
7
Grounding of the power supply is essen-
tial to the safety of personnel as well as the
operation of the System 4 Drive & Control.
A floating, ungrounded or open delta type
power supply can permit dangerously
high voltage between the chassis of the
drive and the internal power structure
components (see Figure 9). In many cases,
this voltage could exceed the rating of the
input MOV protection devices of the drive,
causing catastrophic failure of the System
4 Drive & Control. In all cases, the input
power to this controller must be refer-
enced to ground (see Figure 10). If the ser-
vice transformer cannot be grounded,
then an isolation transformer must be
installed with the secondary of the trans-
former grounded. Please consult the fac-
tory for additional information regarding
isolation transformers or service suitabil-
ity.
Figure 9
NOTE: Cables must be cut to length. There can-
not be any excess cable present in the
control panel or any excessive cable bun-
dles present on the outside of the control
panel.
Figure 10
WIRING NOTE: All wiring from the fused discon-
nect to the control panel, from the control
panel to the optional junction box and the
door, and from the conduit between the
control panel and the floor (if a floor loop is
used) must be supplied by the owner of
the door. The wiring and conduit must
meet all local and state building codes.
Wires leading from the door are labeled
with the terminal numbers that are associ-
ated with the control panel. The high and
low voltage lines must run in separate con-
duit — otherwise, the warranty will be void.
Use shielded wire as indicated on the
schematic. If a wire cable is to be
extended or spliced, a like cable must be
used throughout the entire length of that
cable. Likewise, if a shielded cable is to be
extended or spliced, a like cable must be
used throughout the entire length of that
cable as well — otherwise, the warranty
will be void.
All conduit entering the control panel
must enter from the bottom of the panel
— High voltage from the bottom left
and low voltage from the bottom right.
Installing conduit through the top or
sides of the control panel will void the
warranty.
A5500019
A5500020
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