Phoenix Contact COAXTRAB CN-UB-280DC Installation Instructions Manual

COAXTRAB Surge Voltage
Protection Adapter CN-UB-280DC
For wireless data, signal and mobile
phone system protection
Installation Instructions 2098A
1. Introduction
The Phoenix Contact COAXTRAB CN-UB-280DC
(see Figure 1) is a gas-filled surge protection device
designed to protect wireless radio and module phone
base stations from surge voltages caused by lightning
or other electrical sources that are induced onto an-
tenna cables.
The CN-UB-280DC is available in two configurations;
one with N-type male/female connectors and the other
with N-type female/female connectors.
CN-UB-280DC-SB
PN 28 18 14 8
Male N-type
Connection
2098A003
Female N-type
Connection
Figure 1. CN-UB-280DC Configurations
The CN-UB-280DC features a gas-filled discharge ar-
rester between the inner and outer conductor. See
Figure 2.
N-type
Socket
Shield/Housing
Earth Ground
Connection
Figure 2. CN-UB-280DC Schematic Diagram
Arrow.com.
Downloaded from
CN-UB-280DC-BB
PN 28 18 85 0
Female N-type
Connection
Female N-type
Connection
N-type
Socket
20 kA
Gas
Discharge
Arrester
2098A008
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
INSPIRING INNOVATIONS
The gas discharge tube can be replaced in the event
that a direct lightning strike causes a failure. See
Figure 3.
COAXTRAB Surge
Voltage Protection
Adapter
Gas Arrester Tube
Access Hole
Gas Arrester Tube
PN 2818203
Threaded Cap
Figure 3. CN-UB-280DC Gas Discharge Arrester
The CN-UB-280DC has a separate ground terminal for
installations where nonmetallic enclosures are used or
where a reliable grounding surface is not present.
See Figure 4.
Always keep the ground wire as short as
possible and, when possible, make all
ground connections to a single common
point. Without a single-point ground system,
lightning becomes a critical concern for base
stations. The single-point ground insures
that no ground loops are created.
COAXTRAB Surge
Voltage Protection
Adapter
2098A017
Figure 4. CN-UB-280DC Ground Connection
1
June 2005
2098A015
CAUTION
M3 Grounding
Screw
Instructions 2098A