Paradyne 1900 manual Step Procedure, continued, Single Power Source, Rundant Power Source, 2-51

2. BitStorm 1900 Installation and Testing

Step Procedure (continued)

Figure 2-8: Typical DC Power Harness Connection to -48 V DC (260W) Power Source

Single Power Source

BLACK LEAD	RED LEAD
	-48V dc
V dc Return
	Negative ( - )
Positive ( + )
	Terminal
Terminal

Rundant Power Source

Power Supply #1 Power Supply #2

BLACK LEAD	RED LEAD
V dc Return	-48V dc
Positive ( + )	Negative ( - )
Terminal	Terminal

02-17180

4.) For a -48 V DC power source, connect the red power lead to the Negative (-) terminal connection and the black power lead to the Positive (+) terminal connection as seen in Figure 2-8, "Typical DC Power Harness Connection to -48 V DC (260W) Power Source," on page 51.

NOTE: If using a -48 V DC power supply, use an appropriate volt-ohm meter to test and verify that the red power feed at the shelf is the -48 V DC supply. The meter should read between -46 and -56 V DC.

1900-A2-GN20-00 BitStorm 1900 Installation and Maintenance Guide 2-51