USER
MANUAL
MODEL 552 Series
High Speed Telco Surge
Protectors
Part# 07M552-E
Doc# 074210UE
Revised 02/27/01
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
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An ISO-9001
Certified Company
Repairs to certified equipment should be coordinated by a
representative designated by the supplier. Any repairs or alterations
made by the user to this equipment, or equipment malfunctions, may
give the telecommunications company cause to request the user to
disconnect the equipment.
2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is
warranted for One Year parts and labor. If you have any questions while
installing or using this product, please do not hesitate to contact Patton
Electronics Technical Support at (301) 975-1007.
Users should ensure for their own protection that the electrical
ground connections of the power utility, telephone lines and internal
metallic water pipe system, if present, are connected together. This
precaution may be particularly important in rural areas. Caution: Users
should not attempt to make such connections themselves, but should
contact the appropriate electric inspection authority, or electrician, as
appropriate.
2.1 FEATURES
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Uses a multi-stage hybrid circuit for the best possible protection
Handles surge energy up to 1.5 kW
Conforms to the UL497A telco specification (except E1 versions)
Available for ISDN-U (8-wire), ISDN-ST (4-wire), T1, E1, ISDN
PRI, DDS, leased line and dial up configurations
Diverts surges directly to chassis ground through braided metal
ground strap
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Equipped with two RJ-45 jacks or four BNC connectors
Easy to install
Made in the U.S.A.
2.2 DESCRIPTION
The potential threats to ISDN and Telco hardware are vast:
lightning, AC power induction, electrostatic discharge, ground potential
differences, EMI/RFI interference and more. The Patton Model 552 has
been designed to greatly reduce these risks. Just attach one unit to
each of your telco ports and rest easy.
The Model 552 connects directly between twisted pair telco cables
and their respective I/O ports. Grounding is accomplished using an
external ground strap that provides a separate unit-ground to chassis-
ground connection. By shunting threatening voltages directly to chassis
ground, the Model 552 insures data integrity and protects connected
equipment from damage.
The Model 552 uses a solid state design and sophisticated
multistage hybrid circuits to achieve maximum protection without
performance loss. Eight versions are available: Model 552-ST, 552-D8,
and 552-L8 protect all 8 pins; Model 552-D6 protects six pins; Models
552-DDS, 552-D4, 552-U, 552-L4, 552-E1, 552-E1 CX, and 552-T1
protect four pins; and, Model 552-D2 protects two pins. All versions
provide up to 1500 Watts of data line protection.
NOTE: Model 552-L8 may be used to protect Leased Line, DDS,
T1, E1, ISDN PRI, and ISDN BRI “U” and “ST” interfaces.
WARNING!: This product will not provide complete protection
should your equipment or building be subject to a direct lightning hit.
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3.0 INSTALLATION
APPENDIX A
MODEL 552 SPECIFICATIONS
General
Patton's Model 552 is easy to install and should give you years of
trouble-free service. Here are a few simple instructions to help you get
things hooked up right.
1. Unplug (disconnect) the existing connection between the network
cable and the equipment’s I/O port.
2. Install the Model 552 between the incoming network cable and the
protected equipment using the 6 inch (15.2cm.) modular patch
cable (supplied). Place the surge protector as close as possible to
the device being protected.
Series Resistance:
0.340 Ohms
In Line Fuse Rating:
250V, 3/4A, 2.95 (A2 sec) Nominal Melting
Point
Approvals:
UL497A Telco Specification (except E1
versions)
CE (EMC Directive/EN 50082-1)
Two female RJ-45 or 4 BNC jacks
NOTE:To ensure proper operation of the Model 552, make sure
that your equipment is connected to the protected side of the
Model 552. See Figure 1 below.
Connectors:
NOTE:The Model 552-E1 CX has two pairs of BNC jacks that
connect one to one through the device. See Figure 2 below.
3. Connect the braided ground strap directly to a chassis ground
connection on the protected device. If you are not sure where to
locate a chassis ground connection on your equipment, consult the
equipment's user manual or contact the manufacturer. Correct
ground connection is critical for proper operation of the Model 552.
Model 552-DDS
Pins Protected:
Clamping Voltage:
Pins 1, 2, 7, 8
62 Volts in 500 nsec
Surge Capacity: 1500 Watts for 1 msec;
400A with an 8/20 µsec pulse
Protection Mode: Common Mode Pins 1, 2, 7, 8 to shielding
braid
Connection to
frame ground
Differential Mode Pins 1, 2, 7, 8
Model 552-D2
Output to protected
Input from
equipment
network
Pins Protected:
Pins 4, 5 on the RJ-45 Interface;
Pins 3, 4 on the RJ-11 Interface
310 Volts in 500 nsec
Clamping Voltage:
Surge Capacity: 1500 Watts for 1 msec;
250A with an 8/20 µsec pulse
Protection Mode: Common Mode Pins 4, 5 to shielding
braid
Differential Mode Pins 4, 5
Figure 1. How to Connect the Model 552
Model 552-D4
Pins Protected:
Pins 3, 4, 5, 6 on the RJ-45 Interface
Pins 2, 3, 4, 5 on the RJ-11 Interface
310 Volts in 500 nsec
TX and
RX from
network
TX and RX to
protected
equipment
Clamping Voltage:
Surge Capacity: 1500 Watts for 1 msec;
250A with an 8/20 µsec pulse
Protection Mode: Common Mode Pins 3, 4, 5, 6 to shielding
braid
Differential Mode Pins 3, 4, 5, 6
Figure 2. Model 552-E1CX One to One Connection
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Model 552-D6
Model 552-L4 and 552-U
Pins Protected:
Pins 2, 3, 4, 5, 6, 7 on the RJ-45 Interface
Pins 1, 2, 3, 4, 5, 6 on the RJ-11 Interface
310 Volts in 500 nsec
Pins Protected:
Pins 3, 4, 5, 6
Clamping Voltage:
Clamping Voltage:
62 Volts in 500 nsec
Surge Capacity: 1500 Watts for 1 msec;
250A with an 8/20 µsec pulse
Surge Capacity: 1500 Watts for 1 msec;
400A with an 8/20 µsec pulse
Protection Mode: Common Mode Pins 2, 3, 4, 5, 6, 7 to
shielding braid
Protection Mode: Common Mode pins 3, 4, 5, 6 to shielding
braid
Differential Mode Pins 2, 3, 4, 5, 6, 7
Differential Mode Pins 3, 4 5, and 6
Model 552-D8
Model 552-L8* and 552-ST
Pins Protected:
Clamping Voltage:
Surge Capacity: 1500 Watts for 1 msec;
250A with an 8/20 µsec pulse
Protection Mode: Common Mode Pins 1, 2, 3, 4, 5, 6, 7, 8 to
shielding braid
Pins 1, 2, 3, 4, 5, 6, 7, 8
310 Volts in 500 nsec
Pins Protected:
Clamping Voltage:
SurgeCapacity:
400 A with an 8/20 µsec pulse
Protection Mode: Common Mode pins 1, 2, 3, 4, 5, 6, 7, 8 to
shielding braid
Pins 1, 2, 3, 4, 5, 6, 7, 8
62 Volts in 500 nsec
1500 Watts for 1 msec
Differential Mode Pins 1, 2, 3, 4, 5, 6, 7, 8
Differential Mode Pins 1, 2, 3, 4, 5, 6, 7, 8
Model 552-T1 and 552-E1
Pins Protected:
Pins 1, 2, 4, 5
Clamping Voltage:
Surge Capacity: 1500 Watts for 1 msec;
400A with an 8/20 µsec pulse
62 Volts in 500 nsec
*NOTE: In addition to protecting leased line modem interfaces, the
Model 552-L8 may also be used to protect DDS, T1, E1, ISDN PRI,
and ISDN BRI “U” and “ST” interfaces.
Protection Mode: Common Mode Pins 1, 2, 4, 5 to shielding
braid
Differential Mode Pins 1, 2, 4, 5
Model 552--E1 CX
Pins Protected:
Clamping Voltage:
All shields and center pins
62 Volts in 500 nsec
Surge Capacity: 1500 Watts for 1 msec;
400A with an 8/20 µsec pulse
Protection Mode: Common Mode Center Pins and Shield to
shielding braids
Differential Mode Center Pins to Shields
Copyright © 1997, 2001
Patton Electronics Company
All Rights Reserved
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