Allied Telesis AR Router Series, Справочник по аппаратуре

Страница: 53 / 111

Hardware Reference 53
C613-03031-01 REV E
AT-AR745 AC
AC models of the AT-AR745 have a universal AC input connector and a power
switch on their rear panels. A DB25 connector for an optional external
Redundant Power Supply (RPS), such as the AT-RPS 745, is also located on the
rear panel.
Pin outs for the DB25 RPS connector, and cable specifications for RPS supply
cables, can be found in
“Redundant Power Supply (RPS)” on page 48.
Software Release 2.0 or higher includes monitoring functions for the PSU and
fan in both the AT-AR745 and the RPS. See “LEDs and what they mean” on
page 49 for more information.
AT-AR745-80 DC
The AT-AR745-80, designed for use by telecommunication carrier sites,
supports connection to a 48V DC power supply (in the range 39-59V DC). The
DC model does not support an RPS connection, and does not support
monitoring of the main PSU or fan.
Instructions outlining how to connect an AT-AR745-80 to a DC power supply can be
found in the AR700 Series Router Quick Install Guide. You should read these
instructions and your router’s Safety Information before attempting to connect the
router to a DC power supply
Some interfaces that may be installed in the router are not transformer isolated.
This means they will be referenced to the frame ground of the equipment and
may be damaged if connected to an interface on another piece of equipment
which is at a different ground potential.
Redundant Power Supply (RPS)
AC models of the AT-AR745 can be used in conjunction with the AT-RPS 740.
Each AT-RPS 740 can provide power supply and mains circuit redundancy for
up to two AT-AR740s, AT-AR725s, or AT-AR745s. For more information on the
AT-RPS 740, see “AT-RPS 740” on page 54.
For connection to an AT-RPS 740, the AT-AR745 router has a female DB25
connector on its rear panel (Figure 23 on page 53). Pin outs for the connector
are listed in Table 23 on page 54.
Figure 23: DB25 female connector pinout for an RPS on the AT-AR745 rear panel
Pin 25
Pin 14
Pin 13
Pin 1
A740db25