
13
6. Find the terminal strip inside the bypass switch. Using the label on the back of the bypass switch’s access
panel and the Installation Wiring Diagram for your UPS, make the terminal strip connections and tighten all
connections securely. Use copper wire that is the appropriate size for the current draw. See Figure 8 for a
sample label.
Figure 8
7. Find the proper output neutral-to-ground connection in
on pages 18-19. At the UPS terminal strip,
connect the neutral-to-ground (neutral-to-earth) wire to the proper output terminal before making any other
connections to the UPS. The neutral-to-ground wire is a green and yellow wire labeled WIA-0424. One end
of this wire is already connected to ground (earth) on the UPS terminal strip.
8. Notice that there is a cable routed out of the left side of the bypass switch cabinet. The wires in this cable
must be connected to the UPS logic board to provide bypass status signals to the UPS. To connect the wires,
follow the steps below. If you plan to use the Emergency Power Off feature, see
a) Route the wires through the UPS grommet shown below and to connector J13 on the logic board.
b) Pull the 8-pin connector at J13 apart as shown. The portion you remove from the connector has 8 possible
connection points.
Grommet for
bypass switch
and EPO wires
Tie-wrap bypass
switch and EPO
wires here
Connect bypass
switch and EPO
wires to J13
DIN Rail
8 7
EPO
Inverter
Disable
(MBB -
Red and
Black
Wires)
Bypass
Status
(White
and
Black
Wires)
Not
Used
Loosen
these
screws.
Tighten
them
after making
connections.
6 5 4 3 2 1
Figure 9
1 2
3 5 7
11 11 12 12 13 15 16
N
4
N
6 8
9 10 10
N N L2
L1 L2 L2 L2
L1 L1 L1
14
AC TO UPS
PROTECTED
LOADS
AC FROM
UPS OUTPUT
LINE AC INPUT
AC TO
UPS INPUT
USE COPPER CONDUCTORS ONLY.
!
LAB-1918
REFER TO WIRING DIAGRAMS IN THE INSTALLATION MANUAL.
Terminal
Strip
J13 Connector