INSPIRING INNOVATIONS
COAXTRAB Surge Voltage
Protection Adapter CN-UB-280DC
For wireless data, signal and mobile
phone system protection
Installation Instructions 2098A
June 2005
1.
Introduction
The gas discharge tube can be replaced in the event
that a direct lightning strike causes a failure. See
Figure 3.
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 antenna cables.
COAXTRAB Surge
Voltage Protection
Adapter
Gas Arrester Tube
Access Hole
Gas Arrester Tube
PN 2818203
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.
Threaded Cap
CN-UB-280DC-SB
PN 28 18 14 8
CN-UB-280DC-BB
PN 28 18 85 0
Male N-type
Connection
Female N-type
Connection
2098A015
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.
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
Female N-type
Connection
Figure 1. CN-UB-280DC Configurations
The CN-UB-280DC features a gas-filled discharge arrester between the inner and outer conductor. See
Figure 2.
N-type
Socket
N-type
Socket
Shield/Housing
Earth Ground
Connection
COAXTRAB Surge
Voltage Protection
Adapter
20 kA
Gas
Discharge
Arrester
M3 Grounding
Screw
2098A017
2098A008
Figure 2. CN-UB-280DC Schematic Diagram
Figure 4. CN-UB-280DC Ground Connection
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
1
Instructions 2098A
2.
Typical Applications
Figure 5 shows the various ways that you can install
the CN-UB-280DC adapter.
Straight Bracket
Stand Alone
Through-hole
Right-angle Bracket
2098A002
Figure 5. CN-UB-280DC Applications
3.
Mounting Brackets and
Assemblies
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.
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.
Coaxial
Cable
Coaxial
Cable
N-type Male
Connector
N-type Female
Connector
14 – 16 AWG
Spade-type
Wire Terminal
Internal tooth
Lock Washer
14 – 16 AWG
Ground Wire
Internal tooth
Lock Washer
14 – 16 AWG
Spade-type
Wire Terminal
N-type Male
Connection
M4 (5/32-in)
Mounting Screw
14 – 16 AWG
Ground Wire
M3
Phillipshead
Screw
14 – 16 AWG
Wire Terminal
As Required
14 – 16 AWG
Wire Terminal
As Required
(not supplied)
Straight
Mounting
Bracket
M3
Phillipshead
Screw
2098A004-2
19 mm
Hex-head
Nut
M4 (5/32-in)
Mounting Screw
2098A004-1
Figure 6. Straight Mounting Bracket Assembly
Figure 7. Right-angle Mounting Bracket Assembly
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
Instructions 2098A
Right-angle
Mounting
Bracket
Internal tooth
Lock Washer
Internal tooth
Lock Washer
19 mm
Hex-head
Nut
N-type Female
Connection
2
4.
Typical Cabinet Installation
Figure 8 shows a typical CN-UB-280DC installation inside a cabinet. To avoid problems, please observe
the following guidelines when installing the CN-UB280DC 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 singlepoint earth ground.
Avoid loops in grounding wire.
Avoid making sharp bends in wire.
Antenna
Antenna Adapter
Cable from
Wireless Radio
M3 Phillips-head Screw
with Lock washer (Accepts
14 to 16 AWG Ring or Spade
Terminals)
N-type Male
Coneector
14 to 16 AWG
Ground Wire (see Caution)
CN-UB-280DC
Adapter
1/8 to 1/4-in.
Cap Screw, and
Lock washer
2098A007
16 mm (0.629 in.)
Diameter Hole
14 to 16 AWG
Wire Terminal
N-type Male
Coneector
To
Single-point
Earth Ground
CAUTION
Always cut ground wire to size. Do not
let additional length coiled in installation.
To
Antenna
Figure 8. Typical Cabinet Installation
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
3
Instructions 2098A
5.
Dimensions
Figures 9 through 12 provide dimensions for each
mounting bracket and for each of the CN-UB-280DC
mounting bracket assemblies.
6.6 mm (0.260 in.)
10.325 mm
(0.406 in.)
20.65 mm
(0.813 in.)
16 mm
(0.639 in.)
30 mm
(1.181 in.)
4.77 mm (0.187 in.)
35 mm
(1.377 in.)
5.2 mm (0.205 in.)
Dia. Hole (3 places)
50 mm
(1.968 in.)
2 mm
(0.078 in.)
2098A012
Figure 9. Straight Mounting Bracket Dimensions
Male “N” Connector
Female “N” Connector
20 mm
(0.787 in.)
17 mm
(0.669 in.)
Straight
Mounting
Bracket
27 mm
(1.062 in.)
72 mm
(2.834 in.)
2 mm
(0.078 in.)
23 mm
(0.905 in.)
Straight
Mounting
Bracket
27 mm
(1.062 in.)
67 mm
(2.637 in.)
2 mm
(0.078 in.)
23 mm
(0.905 in.)
2098A011
Female “N” Connector
Female “N” Connector
COAXTRAB
COAXTRAB
CN-UB-280DC-BB
CN-UB-280DC-SB
Figure 10. Adapter and Straight Mounting Bracket Assembly Dimensions
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
Instructions 2098A
4
10.50 mm (0.413 in.)
10.325 mm
(0.406 in.)
20.65 mm
(0.813 in.)
14 mm
(0.551 in.)
30 mm
(1.181 in.)
6.00 mm (0.236 in.)
23.0 mm
(0.905 in.)
45.0 mm
(1.771 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
Male “N” Connector
Female “N” Connector
20 mm
(0.787 in.)
17 mm
(0.669 in.)
Right-Angle
Mounting
Bracket
27 mm
(1.062 in.)
72 mm
(2.834 in.)
67 mm
(2.637 in.)
2 mm
(0.078 in.)
23 mm
(0.905 in.)
Right-Angle
Mounting
Bracket
27 mm
(1.062 in.)
2 mm
(0.078 in.)
23 mm
(0.905 in.)
2098A013
Female “N” Connector
Female “N” Connector
COAXTRAB
COAXTRAB
CN-UB-280DC-BB
CN-UB-280DC-SB
Figure 12. Adapter and Right-angle Mounting Bracket Assembly Dimensions
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
5
Instructions 2098A
6.
Technical Data
7.
(see Table 1)
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.
Table 1. CN-UB-280DC Specifications
General Specifications
Maximum continuous operating voltage .................. 280 V dc
Maximum circuit operating current .................. ≤ 5 A at 25 °C
COAXTRAB
Surge Voltage
Protection Adapter
Maximum high-frequency power with a Standing
Wave Ratio (SWR) = 1.1in a 50 Ω system ............... 700 W
2098A005
Rated discharge surge current
(8/20 µs test curve) .................................................... 20 kA
Rated discharge surge current
(10/1000 µs test curve) .............................................. 100 A
Output voltage tested with 1 kV/µs waveform
line to shield (ground) ............................................. ≤ 700 V
Gas Arrester Tube
Access Hole
Gas Arrester Tube
PN 2818203
Response time (common mode line to ground) ........ ≤ 100 ns
Insertion loss (50 Ω systems) ........... ≤ 0.1 dB up to 1.2 GHz
...................................................... ≤ 0.2 dB up to 2.2 GHz
DC cutoff frequency (3 dB) ....................................... > 3 GHz
Gas Tube
Threaded Cap
Recess
Figure 13. CN-UB280DC Gas Arrester Replacement
Leakage current, line-ground ...................................... ≤ 1 µA
Voltage Standing Wave Ratio (SWR) .......... ≤ 1.1 to 2.0 GHz
Capacitance (common mode) ..................................... 1.5 pF
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.
Connector type .......................................................... N, 50 Ω
Temperature range ..................................... -20 °C to + 80 °C
2098A009
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.
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
Instructions 2098A
6
8.
Ordering Data
Figure 14 shows identifies the various parts, assemblies and accessories that are available for the COAXTRAB CN-UB-280DC adapter. Table 2 lists the order
1
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.
5
3
2
6
4
CAUTION
Always cut ground wire to size. Do not
let additional length coiled in installation.
7
8
9
10
2098A016
Figure 14. CN-UB280DC Surge Voltage Protector Parts and Accessories
Table 2. Parts List for Figure 14 (CN-UB-280DC)
Item
No.
Components
1
2
COAXTRAB surge voltage adapter, coaxial N-type connectors,
female/female
COAXTRAB surge voltage adapter, Coaxial N-type connectors,
male/female
Order No.
CN-UB-280DC-BB
28 18 85 0
CN-UB-280DC-SB
28 18 14 8
3
4
5
Mounting bracket, straight
Mounting bracket, right angle
Ground wire, 1.5 meter length, 16 AWG with ring lug
CN-UB/MP
CN-UB/MP-90 DEGREE
C-UFB-PA
28 18 13 5
56 04 83 8
27 62 36 2
6
Gas arrester tube
CN-UB-G1
28 18 20 3*
7
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
8
Assemblies
Type
Description
9
10
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-BH ASSY
56 03 85 9
CN-UB-280DC-SB-BH ASSY
56 02 35 7
CN-UB-280DC-BB-L ASSY
56 05 58 8
CN-UB-280DC-SB-L ASSY
56 05 58 7
2098A010
*Recommended spare part
NOTE: 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.
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
7
Instructions 2098A
The information given herein is based on data believed to be reliable, but Phoenix
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
taken as a license to operate under, or recommendation to infringe, any patent.
Headquarters, U.S.
Phoenix Contact Inc.
P.O. Box 4100
Harrisburg, PA 17111-0100
Phone: (717) 944-1300
Fax: (717) 944-1625
Email: info@phoenixcon.com
Web Site: www.phoenixcon.com
Technical Support or Information
Phone: 1-800-322-3225
Headquarters, Canada
Phoenix Contact Ltd.
235 Watline Avenue
Mississauga, Ontario L4Z 1P3
Phone: (905) 890-2820
Fax: (905) 890-0180
Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: (717) 944-1300 • FAX: (717) 944-1625
Instructions 2098A
8
