ADTRAN TOTAL ACCESS MX2800, Руководство пользователя, Страница: 22 / 142

Chapter 2. Installation and Operation
2-2 MX2800 User Manual 61200290L1-1
• Mounting ears and screws for 19- or 23-inch rack installation
• User manual or CD containing the User Manual
Power Up
The AC version of the MX2800 is provided with a six-foot power
cord, terminated by a three-prong plug which connects to a
grounded 120 VAC power receptacle.
The DC version of the MX2800 is provided with two four-position
modular terminal lug connectors. These connectors make it easier
to perform initial wiring and to connect and disconnect DC power
when replacing rackmount units.
To establish DC power, use 12 to 26 AWG wire to connect the
modular connector as follows:
1. Connect the wire lugs on the modular connector which
correspond to the positive (
RET
) and negative (
-
) terminals on
the rear panel to a -48V DC, 1A source.
2. Connect the wire lug on the modular connector which
corresponds to the
PWR FAIL
terminal on the rear panel to a
battery backup source.
3. Connect the remaining wire lug to the frame ground.
Once the modular connector is wired, push it firmly into one of the
rear panel
POWER
connectors. Figure 2-1 and Table 2-1 on page 2-3
illustrate the DC power connector and give definitions for the four
connector symbols.
The ADTRAN MX2800 MIB is available in the support section of the
ADTRAN Web page at www.adtran.com.
Power to the AC version of the MX2800 must be provided from a
grounded 120 VAC, 60 Hz receptacle.