Instructions 2098A
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
1
For wireless data, signal and mobile
phone system protection
Installation Instructions 2098A
June 2005
COAXTRAB Surge Voltage
Protection Adapter CN-UB-280DC
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.
The CN-UB-280DC features a gas-filled discharge ar-
rester between the inner and outer conductor. See
Figure 2.
Gas Arrester Tube
Access Hole
Gas Arrester Tube
PN 2818203
Threaded Cap
COAXTRAB Surge
Voltage Protection
Adapter
2098A015
Figure 3. CN-UB-280DC Gas Discharge Arrester
20 kA
Gas
Discharge
Arrester
N-type
Socket
N-type
Socket
Shield/Housing
Earth Ground
Connection
2098A008
Figure 2. CN-UB-280DC Schematic Diagram
The gas discharge tube can be replaced in the event
that a direct lightning strike causes a failure. See
Figure 3.
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.
CAUTION
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.
2098A003
Female N-type
Connection
Male N-type
Connection
CN-UB-280DC-SB
PN 28 18 14 8
CN-UB-280DC-BB
PN 28 18 85 0
Female N-type
Connection
Female N-type
Connection
Figure 1. CN-UB-280DC Configurations
Figure 4. CN-UB-280DC Ground Connection
M3 Grounding
Screw
2098A017
COAXTRAB Surge
Voltage Protection
Adapter
INSPIRING INNOVATIONS
Instructions 2098A
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
2
2. Typical Applications
Figure 5 shows the various ways that you can install
the CN-UB-280DC adapter.
3. Mounting Brackets and
Assemblies
Phoenix Contact offers two mounting brackets
(straight and right angle) and four mounting bracket
assemblies, which include both the bracket and the
adapter. Figure 6 shows a typical CN-UB-280DC
adapter assembly using a straight mounting bracket.
Internal tooth
Lock Washer
14 – 16 AWG
Ground Wire
14 – 16 AWG
Spade-type
Wire Terminal
14 – 16 AWG
Wire Terminal
As Required
(not supplied)
N-type Male
Connector
N-type Female
Connection
Coaxial
Cable
Right-angle
Mounting
Bracket
Internal tooth
Lock Washer
19 mm
Hex-head
Nut
2098A004-2
M3
Phillips-
head
Screw
M4 (5/32-in)
Mounting Screw
Figure 7. Right-angle Mounting Bracket Assembly
Internal tooth
Lock Washer
N-type Female
Connector
N-type Male
Connection
Coaxial
Cable
Straight
Mounting
Bracket
Internal tooth
Lock Washer
19 mm
Hex-head
Nut
2098A004-1
M4 (5/32-in)
Mounting Screw
M3
Phillips-
head
Screw
14 – 16 AWG
Ground Wire
14 – 16 AWG
Spade-type
Wire Terminal
14 – 16 AWG
Wire Terminal
As Required
Figure 6. Straight Mounting Bracket Assembly
2098A002
Stand Alone
Straight Bracket
Right-angle Bracket
Through-hole
Figure 5. CN-UB-280DC Applications
Figure 7 shows a typical adapter assembly using a
right-angled mounting bracket. Refer to the Ordering
Data at the back of these instructions for individual or
assembly part numbers.
Instructions 2098A
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
3
2098A007
Antenna
M3 Phillips-head Screw
with Lock washer (Accepts
14 to 16 AWG Ring or Spade
Terminals)
1/8 to 1/4-in.
Cap Screw, and
Lock washer
CN-UB-280DC
Adapter
Antenna Adapter
Cable from
Wireless Radio
To
Antenna
N-type Male
Coneector
N-type Male
Coneector
14 to 16 AWG
Wire Terminal
To
Single-point
Earth Ground
14 to 16 AWG
Ground Wire (see Caution)
16 mm (0.629 in.)
Diameter Hole
CAUTION
Always cut ground wire to size. Do not
let additional length coiled in installation.
Figure 8. Typical Cabinet Installation
4. Typical Cabinet Installation
Figure 8 shows a typical CN-UB-280DC installation in-
side a cabinet. To avoid problems, please observe
the following guidelines when installing the CN-UB-
280DC adapter.
• Install adapter as close as possible to the radio.
• Ensure cabinet is properly grounded to earth.
• Make sure adapter is grounded to cabinet. If
necessary, install separate ground wire.
• Always make ground wire as short as possible.
• When possible, connect ground wire to single-
point earth ground.
• Avoid loops in grounding wire.
• Avoid making sharp bends in wire.
Instructions 2098A
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
4
5. Dimensions
Figures 9 through 12 provide dimensions for each
mounting bracket and for each of the CN-UB-280DC
mounting bracket assemblies.
4.77 mm (0.187 in.)
6.6 mm (0.260 in.)
20.65 mm
(0.813 in.)
10.325 mm
(0.406 in.)
35 mm
(1.377 in.)
30 mm
(1.181 in.)
16 mm
(0.639 in.)
5.2 mm (0.205 in.)
Dia. Hole (3 places)
2 mm
(0.078 in.)
50 mm
(1.968 in.)
2098A012
Figure 9. Straight Mounting Bracket Dimensions
23 mm
(0.905 in.)
27 mm
(1.062 in.)
20 mm
(0.787 in.)
2 mm
(0.078 in.)
72 mm
(2.834 in.)
23 mm
(0.905 in.)
27 mm
(1.062 in.)
17 mm
(0.669 in.)
2 mm
(0.078 in.)
67 mm
(2.637 in.)
COAXTRAB
CN-UB-280DC-SB
COAXTRAB
CN-UB-280DC-BB
Male“N”Connector
Female“N”Connector
Female“N”Connector
Female“N”Connector
2098A011
Straight
Mounting
Bracket
Straight
Mounting
Bracket
Figure 10. Adapter and Straight Mounting Bracket Assembly Dimensions
Instructions 2098A
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
5
Female“N”Connector
23 mm
(0.905 in.)
27 mm
(1.062 in.)
20 mm
(0.787 in.)
2 mm
(0.078 in.)
72 mm
(2.834 in.)
23 mm
(0.905 in.)
27 mm
(1.062 in.)
17 mm
(0.669 in.)
2 mm
(0.078 in.)
67 mm
(2.637 in.)
COAXTRAB
CN-UB-280DC-SB
COAXTRAB
CN-UB-280DC-BB
Female“N”Connector
Female“N”Connector
Right-Angle
Mounting
Bracket
Right-Angle
Mounting
Bracket
2098A013
Male“N”Connector
30 mm
(1.181 in.)
14 mm
(0.551 in.)
23.0 mm
(0.905 in.)
45.0 mm
(1.771 in.)
10.325 mm
(0.406 in.)
20.65 mm
(0.813 in.)
6.00 mm (0.236 in.)
10.50 mm (0.413 in.)
5.2 mm (0.205 in.)
Dia. Hole (3 places)
23.0 mm
(0.905 in.)
2098A014
Figure 11. Right-angle Mounting Bracket Dimensions
Figure 12. Adapter and Right-angle Mounting Bracket Assembly Dimensions
Instructions 2098A
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
6
6. Technical Data (see Table 1) 7. Gas Arrester Replacement
1. Using a blade type screwdriver remove the
threaded cap from the adapter housing. See
Figure 13. Then remove and discard the gas
arrester tube from the housing.
Maximum continuous operating voltage .................. 280 V dc
Maximum circuit operating current .................. 5 A at 25 °C
Rated discharge surge current
(8/20 s test curve).................................................... 20 kA
Output voltage tested with 1 kV/ s waveform
line to shield (ground) .............................................
Response time (common mode line to ground)........
≤
µ
µ
Maximum high-frequency power with a Standing
Wave Ratio (SWR) = 1.1in a 50 system ............... 700 W
Rated discharge surge current
(10/1000 s test curve).............................................. 100 A
700 V
100 ns
Insertion loss (50 systems) ........... 0.1 dB up to 1.2 GHz
0.2 dB up to 2.2 GHz
DC cutoff frequency (3 dB) ....................................... > 3 GHz
Leakage current, line-ground ...................................... 1 A
Voltage Standing Wave Ratio (SWR) .......... 1.1 to 2.0 GHz
Capacitance (common mode) ..................................... 1.5 pF
Connector type .......................................................... N, 50
Temperature range ..................................... -20 °C to + 80 °C
Ω
µ
≤
≤
Ω≤
≤
≤µ
≤
Ω
......................................................
General Specifications
2098A009
Table 1. CN-UB-280DC Specifications
Note
The threaded cap contains a recess that
positions the gas arrester tube in the center
of the access hole. If the gas arrester tube
is not positioned in this recess while installing
the threaded cap, the arrester will not seat
properly and the threaded cap will not screw
completely into the housing.
If you experience a problem installing the
gas arrester tube, remove the COAXTRAB
adapter from the system. Then position the
adapter as shown in Figure 13 and install
the gas arrester tube.
2. Insert the replacement gas arrester tube in the
recess of the threaded cap. Then carefully
insert the gas arrester tube and cap into the
access hole of the adapter and tighten the cap.
Gas Arrester Tube
Access Hole
Gas Arrester Tube
PN 2818203
2098A005
Gas Tube
Threaded Cap
Recess
COAXTRAB
Surge Voltage
Protection Adapter
Figure 13. CN-UB280DC Gas Arrester Replacement
Instructions 2098A
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
7
Table 2. Parts List for Figure 14 (CN-UB-280DC)
Components
Assemblies
COAXTRAB surge voltage adapter, coaxial N-type connectors,
female/female
COAXTRAB surge voltage adapter, Coaxial N-type connectors,
male/female
Mounting bracket, straight
Mounting bracket, right angle
Ground wire, 1.5 meter length, 16 AWG with ring lug
Gas arrester tube
COAXTRAB surge voltage adapter assembly, includes straight bracket
(attached) with, Coaxial N-type connectors, female/female
COAXTRAB surge voltage adapter assembly, includes straight bracket
(attached) with, Coaxial N-type connectors,
male/female
COAXTRAB surge voltage adapter assembly, includes right-angle
bracket (attached) with, Coaxial N-type connectors, female/female
COAXTRAB surge voltage adapter assembly, includes right-angle
bracket (attached) with, Coaxial N-type connectors,
male/female
CN-UB-280DC-BB
CN-UB-280DC-SB
CN-UB/MP
CN-UB/MP-90 DEGREE
C-UFB-PA
CN-UB-G1
CN-UB-280DC-BB-BH ASSY
CN-UB-280DC-SB-BH ASSY
CN-UB-280DC-BB-L ASSY
CN-UB-280DC-SB-L ASSY
28 18 85 0
28 18 14 8
28 18 13 5
56 04 83 8
27 62 36 2
28 18 20 3*
56 03 85 9
56 02 35 7
56 05 58 8
56 05 58 7
2098A010
Description
Type
Order No.
Item
No.
*Recommended spare part
COAXTRAB surge voltage protection adapters are available with 7/16-in. connectors upon request.
Adapters are also available in F-type connectors. Contact Phoenix Contact Technical Services at 1-800-322-3225 or
visit our web site at www.phoenixcon.com/trabtech.
NOTE:
1
2
3
4
5
6
7
8
9
10
1
2
3
4
6
5
9 107 8
2098A016
CAUTION
Always cut ground wire to size. Do not
let additional length coiled in installation.
Figure 14. CN-UB280DC Surge Voltage Protector Parts and Accessories
8. Ordering Data
Figure 14 shows identifies the various parts, assem-
blies and accessories that are available for the COAX-
TRAB CN-UB-280DC adapter. Table 2 lists the order
numbers for each of these component. To order, refer
to the Phoenix Contact web site listed on the back of
these instructions to locate a distributor near you.
Instructions 2098A
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
8
Theinformationgivenhereinisbasedondatabelievedtobereliable,butPhoenix
Contact Inc. makes no warranties expressed or implied as to its accuracy and
assumes no liability arising out of its use by others.This publication is not to be
takenasalicensetooperateunder,orrecommendationtoinfringe,anypatent.
Headquarters, U.S.
Technical Support or Information
Headquarters, Canada
Phoenix Contact Inc.
P.O.Box 4100
Harrisburg, PA 17111-0100
Phone:(717) 944-1300
Fax: (717) 944-1625
Email: [email protected]
Web Site: www.phoenixcon.com
Phone: 1-800-322-3225
Phoenix Contact Ltd.
235 Watline Avenue
Mississauga, Ontario L4Z 1P3
Phone: (905) 890-2820
Fax: (905) 890-0180
/
