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

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 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.

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

CN-UB-280DC-BB

PN 28 18 85 0

Female N-type

Connection

Female N-type

Connection

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

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.

The CN-UB-280DC features a gas-filled discharge ar­rester between the inner and outer conductor. See
Figure 2.

N-type
Socket

20 kA
Gas
Discharge

Shield/Housing

Earth Ground

Connection

Arrester

Figure 2. CN-UB-280DC Schematic Diagram

Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: [phone] • FAX: [phone]

N-type
Socket

2098A008

1

COAXTRAB Surge
Voltage Protection
Adapter

M3 Grounding

2098A017

Screw

Figure 4. CN-UB-280DC Ground Connection

Instructions 2098A

2. Typical Applications

Figure 5 shows the various ways that you can install
the CN-UB-280DC adapter.

Stand Alone

Straight Bracket

Right-angle Bracket

Figure 5. CN-UB-280DC Applications

3. Mounting Brackets and
Assemblies

Through-hole

2098A002

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

N-type Female
Connector

N-type Male
Connection

M4 (5/32-in)
Mounting Screw

Straight
Mounting
Bracket

2098A004-1

14 – 16 AWG
Spade-type
Wire Terminal

14 – 16 AWG
Ground Wire

14 – 16 AWG
Wire Terminal
As Required

Internal tooth
Lock Washer

M3
Phillips­head
Screw

Internal tooth
Lock Washer

19 mm
Hex-head
Nut

Figure 6. Straight Mounting Bracket Assembly

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.

Coaxial
Cable

N-type Male
Connector

N-type Female
Connection

Right-angle
Mounting
Bracket

2098A004-2

M4 (5/32-in)
Mounting Screw

14 – 16 AWG
Spade-type
Wire Terminal

14 – 16 AWG
Ground Wire

14 – 16 AWG
Wire Terminal
As Required
(not supplied)

Internal tooth
Lock Washer

M3
Phillips­head
Screw

Internal tooth
Lock Washer

19 mm
Hex-head
Nut

Figure 7. Right-angle Mounting Bracket Assembly

Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: [phone] • FAX: [phone]

Instructions 2098A

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

N-type Male
Coneector

CN-UB-280DC
Adapter

16 mm (0.629 in.)
Diameter Hole

N-type Male
Coneector

Antenna Adapter

Cable from

Wireless Radio

To

Antenna

M3 Phillips-head Screw
with Lock washer (Accepts
14 to 16 AWG Ring or Spade
Terminals)

14 to 16 AWG
Ground Wire (see Caution)

1/8 to 1/4-in.
Cap Screw, and
Lock washer

14 to 16 AWG
Wire Terminal

To

Single-point

Earth Ground

CAUTION

Always cut ground wire to size. Do not
let additional length coiled in installation.

2098A007

Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: [phone] • FAX: [phone]

Figure 8. Typical Cabinet Installation

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.)

4.77 mm (0.187 in.)

16 mm

30 mm

(0.639 in.)

(1.181 in.)

10.325 mm
(0.406 in.)

20.65 mm
(0.813 in.)

72 mm

(2.834 in.)

20 mm

(0.787 in.)

27 mm

(1.062 in.)

Figure 9. Straight Mounting Bracket Dimensions

Male“N”Connector

50 mm

(1.968 in.)

Straight
Mounting
Bracket

35 mm

(1.377 in.)

67 mm

(2.637 in.)

5.2 mm (0.205 in.)
Dia. Hole (3 places)

2 mm

(0.078 in.)

Female“N”Connector

17 mm

(0.669 in.)

27 mm

(1.062 in.)

2098A012

Straight
Mounting
Bracket

23 mm

(0.905 in.)

Female“N”Connector

COAXTRAB

CN-UB-280DC-SB

Figure 10. Adapter and Straight Mounting Bracket Assembly Dimensions

Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: [phone] • FAX: [phone]

Instructions 2098A

2 mm

(0.078 in.)

2 mm

23 mm

(0.905 in.)

(0.078 in.)

2098A011

Female“N”Connector

COAXTRAB

CN-UB-280DC-BB

4

30 mm

(1.181 in.)

14 mm

(0.551 in.)

23.0 mm

(0.905 in.)

45.0 mm

(1.771 in.)

23.0 mm

(0.905 in.)

5.2 mm (0.205 in.)
Dia. Hole (3 places)

Figure 11. Right-angle Mounting Bracket Dimensions

10.50 mm (0.413 in.)

6.00 mm (0.236 in.)

10.325 mm
(0.406 in.)

20.65 mm
(0.813 in.)

2098A014

72 mm

(2.834 in.)

Male“N”Connector

Female“N”Connector

20 mm

(0.787 in.)

27 mm

(1.062 in.)

23 mm

(0.905 in.)

Female“N”Connector

COAXTRAB

CN-UB-280DC-SB

Right-Angle
Mounting
Bracket

2 mm

(0.078 in.)

(2.637 in.)

67 mm

17 mm

(0.669 in.)

27 mm

(1.062 in.)

23 mm

(0.905 in.)

Female“N”Connector

COAXTRAB

CN-UB-280DC-BB

Figure 12. Adapter and Right-angle Mounting Bracket Assembly Dimensions

Right-Angle
Mounting
Bracket

2 mm

(0.078 in.)

2098A013

Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: [phone] • FAX: [phone]

5

Instructions 2098A

6. Technical Data (see Table 1) 7. Gas Arrester Replacement

Table 1. CN-UB-280DC Specifications

General Specifications

Maximum continuous operating voltage .................. 280 V dc

Maximum circuit operating current .................. 5 A at 25 °C

Maximum high-frequency power with a Standing

Wave Ratio (SWR) = 1.1in a 50 system ............... 700 W

Rated discharge surge current

(8/20 s test curve).................................................... 20 kA

µ

Rated discharge surge current

(10/1000 s test curve).............................................. 100 A

Output voltage tested with 1 kV/ s waveform

line to shield (ground) .............................................

Response time (common mode line to ground)........

Insertion loss (50 systems) ........... 0.1 dB up to 1.2 GHz

DC cutoff frequency (3 dB) ....................................... > 3 GHz

Leakage current, line-ground ...................................... 1 A

Voltage StandingWave 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

µ

Ω≤

......................................................

Ω

µ

≤

≤

700 V

≤

100 ns

≤

0.2 dB up to 2.2 GHz

≤µ

≤

2098A009

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.

COAXTRAB
Surge Voltage
Protection Adapter

Recess

Gas Arrester Tube
Access Hole

Gas Arrester Tube
PN 2818203

Gas Tube
Threaded Cap

2098A005

Figure 13. CN-UB280DC Gas Arrester Replacement

Note

Ω

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.

Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: [phone] • FAX: [phone]

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

2098A016

2

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.

3

4

5

6

CAUTION

Always cut ground wire to size. Do not
let additional length coiled in installation.

9 107 8

Figure 14. CN-UB280DC Surge Voltage Protector Parts and Accessories

Table 2. Parts List for Figure 14 (CN-UB-280DC)

Item

No.

COAXTRAB surge voltage adapter, coaxial N-type connectors,

1

2

3
4

Components

5

6

7

8

9

Assemblies

10

*Recommended spare part

NOTE:

Adapters are also available in F-type connectors. Contact Phoenix ContactTechnical Services at 1-800-322-3225 or
visit our web site at www.phoenixcon.com/trabtech.

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

COAXTRAB surge voltage protection adapters are available with 7/16-in.connectors upon request.

Description

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

Type

Order No.

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

Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: [phone] • FAX: [phone]

7

Instructions 2098A

Theinformationgivenherein isbasedon databelievedtobe reliable,but Phoenix
Contact Inc. makes no warranties expressed or implied as to its accuracy and
assumes no liability arising out of itsuse by others.This publication is not to be
takenasalicense tooperateunder,orrecommendationto infringe,anypatent.

Headquarters, U.S.

Phoenix Contact Inc.
P.O.Box 4100
Harrisburg, PA 17111-0100
Phone:[phone]
Fax:[phone]
Email: [e-mail]
Web Site:www.phoenixcon.com

Technical Support or Information

Phone: [phone]

Headquarters, Canada

Phoenix Contact Ltd.
235 Watline Avenue
Mississauga, Ontario L4Z 1P3
Phone: [phone]
Fax:[phone]

Phoenix Contact Inc. • P.O. Box 4100 • Harrisburg, PA 17111 • Phone: [phone] • FAX: [phone]

Instructions 2098A

8