451-0331
MRV Communications, Inc.
www.mrv.com
21
Installing the LX-8000 Series
Connecting DC Power
This section describes how to connect power to the DC version of the LX-8000 Series.
Figure 7 - Connecting DC Power
After you have installed the LX-8000 unit, you can connect the DC power as described in the
following procedure (refer to Figure 7):
1. Connect the LX-8000 to the facility's bonding network (or earth ground) using the points
on the rear panel of the LX-8000. A grounding lug is required to do this. This grounding
lug is not available through or provided by MRV. You can obtain it through any electrical
connector supplier. The grounding lug used must have two #10 screw holes that are
spaced .625 inches apart (center to center). The connection to the facility's bonding net-
work should be made per local practices, using wire with a minimum conductor size of 18
AWG.
2. Use the two #10 screws (included) on the rear panel to secure the grounding lug to the chassis.
3. Using a ¼-inch nut driver, remove the terminal block nuts.
4. Attach the facility’s “A” feed to the terminal block labeled “A”.
NOTE:
Be sure that the -48VDC is connected to the
minus
side, and the 48VDC return is connected
to the
plus
side.
5. Attach the facility’s “B” feed to the terminal block labeled “B”.
6. Replace the nuts and tighten them securely.
The DC leads should be 22 AWG or larger. They should be terminated with a #6 ring terminal
suitable for the wire AWG used.
NOTE:
The LX-8000 will run with only one DC power feed connected. The second input is provided
for redundant system power, which is used in high reliability installations.
7. Attach the clear plastic safety guard to the terminal blocks. (The clear plastic safety guard is pro-
vided with the LX-8000 kit.)
#10
Grounding
Lugs
-48/-60 VDC
0.75A MAX
!
Содержание LX-8000 Series
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