Important Instructions; Optional Power Sources - Paradyne 3172 Operator's Manual

Important Instructions

Read and follow all warning notices and instructions
marked on the E1 DSU/CSU or included in this guide.
CAUTION
Disconnect the power cable
before connecting or removing
any data cables at the rear of
the unit.
HANDLING PRECAUTIONS
FOR
STATIC-SENSITIVE DEVICES
AT&T Paradyne products are
designed to protect sensitive
components from damage due to
electrostatic discharge (ESD)
during normal operation. When
performing installation procedures,
however, take proper static control
precautions to prevent damage to
equipment. If you are not sure of
the proper static control
precautions, contact the nearest
AT&T Paradyne Customer
Support office.
3170-A2-GB20-10
Figure 2-10. +24 Vdc Power Supply Pinouts
March 1996

Optional Power Sources

The E1 DSU/CSU is typically powered by the ac
power module. Use the following procedures only if
you want to use an optional dc power source.
Using the optional dc power cable, the E1 DSU/CSU is
capable of operating on either a +24 Vdc power source,
– 48 Vdc single source battery, or – 48 Vdc redundant
source batteries (for power backup). To select the power,
choose one of the following power supply types.
Installing the +24 Vdc Power Supply
To install the E1 DSU/CSU using a +24 Vdc power
supply, refer to Figure 2-10 and use the following
procedure.
To install the +24 Vdc power supply,
1. Connect the green wire to a suitable earth ground.
2. Connect the white wire to the +24 Vdc return.
3. Connect the orange wire to the +24 Vdc source.
4. Cut the black, red and blue wires off at the outer
insulation.
5. Plug the power connector into the E1 DSU/CSU.
Installation
2-5