Installation
2-33163-A2-GB20-10 March 1999
Important Instructions
Read and follow all warning notices and instructions
marked on the DSU/CSU or included in this guide.
For a complete listing of the safety instructions, see the
Important Safety Instructions section at the beginning of
this guide.
HANDLING PRECAUTIONS
FOR
STATIC-SENSITIVE DEVICES
This product is 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 your nearest sales or service
representative.
Optional Power Sources
The 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 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 use dc power,
choose one of the following power supply types.

Installing the +24 Vdc Power Supply

To install the DSU/CSU using a +24 Vdc power
supply, refer to Figure 2-3 and use the following
procedure.
"Procedure
To install the +24 Vdc power supply:
1. Connect the green wire to a suitable 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 DSU/CSU.
1
2
3
4
5
6
BLACK
RED
GREEN
WHITE
ORANGE
BLUE
GROUND
+24 VDC RETURN
+24 VDC SOURCE
99-14298-02
X
X
X
DSU/CSU POWER
PLUG TO CUSTOMER-SUPPLIED BATTERY
Figure 2-3. +24 Vdc Power Supply Pinouts