Cisco Proteus Node Return Digital Transmitter with Ethernet Installationsanleitung
78-4028521-01 Rev B
Installation
2-5
Laser Link III Mainframe Electrical Connections
Overview
The Laser Link III Mainframe requires the following electrical connections:
•
•
Power supply
•
Power distribution board
Power Supply Connections
Connect the power supplies as described below.
IF the primary input
is…
THEN…
an AC power source
connect the power cord to the mainframe and power
source.
a -48 V DC power
source
apply -48 V DC potential on the rear of the power supply,
using the supplied connectors (and noting polarity). See
Rear Panel Drawing.
Rear Panel Drawing
The following illustration shows the rear panel.
Important: Connect the -48 V potential to the negative terminal. Connect the
ground potential (DC return) to the positive terminal. Wire gauge specifications for
the -48 V DC/13 A input are as follows:
10’ cable: 17 AWG minimum
10’ cable: 17 AWG minimum
5’ cable: 20 AWG minimum