2. Installation
2-6 March 2001 3160-A2-GB24-10
Optional Power Sources (Model 3164 Only)
The DSU/CSU is typically powered by the ac power module. Use the
following procedures only if you want to use an optional SELV (Safety Extra
Low Voltage) dc power source with your Model 3164 DSU/CSU.
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 Model 3164 DSU/CSU using a +24 Vdc SELV power supply, refer to
Figure 2-8, +24 Vdc Power Supply Pinouts, and use the following procedure.
Procedure
To install the +24 Vdc power supply:
1. Connect th e green wire to a suitable ground.
2. Connect th e white wire to the +24 Vdc return.
3. Connect th e 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.
Figure 2-8. +24 Vdc Power Supply Pinouts
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