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Black Box SP251A - page 1
CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mail order: Black Box Corporation , 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com JANUARY 1 ...
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NOM STATEMENT 3 NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD ...
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Black Box SP251A - page 3
CATEGORY 5 PRIMARY AND SECONDARY SURGE PROTECTORS TRADEMARK USED IN THIS MANUAL 4 ...
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TABLE O F CONTENTS Contents Chapter Page 5 ...
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Black Box SP251A - page 5
1. Specifications CATEGORY 5 PRIMARY AND SECONDARY SURGE PROTECTORS Compliance — Standards — Interfaces — CAUTION! Because of clamp-voltage limitations, the Surge Protectors are not compatible with ARCNET ® or Type 1 Token Ring. Maximum Data Rate — Response Time — Characteristic Impedance — NEXT Loss — Appendix B Surge Rating — Sur ...
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Black Box SP251A - page 6
7 CHAPTER 1: Specifications DC Clamp Voltage — Grounding — Insertion Loss — Return Loss — Group Delay — Series Resistance — Ω Connectors — Leads/Signals Protected — MTBF — Maximum Altitude — Temperature Tolerance — Humidity Tolerance — Size — Weight — ...
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Black Box SP251A - page 7
8 CATEGORY 5 PRIMARY AND SECONDARY SURGE PROTECTORS 2.1 General Overview Appendix B CAUTION! These surge protectors will not provide complete protection should your equipment or building be subject to a direct lightning hit, nor will they provide complete protection against severe differences in ground potential (“severe ground loops”). 2. Intr ...
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9 CHAPTER 2: Introduction 2.2 Important Features ...
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10 CATEGORY 5 PRIMARY AND SECONDARY SURGE PROTECTORS 3.1 Applications 3.1.1 T HE S ECONDARY S URGE P ROTECTOR (SP251A) Figure 3-1. A typical point-of-use application for the SSP . 3. Installation Category 5 Secondary Surge Protectors ...
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Black Box SP251A - page 10
11 CHAPTER 3: Installation 3.1.2 T HE P RIMARY S URGE P ROTECTOR (SP250A) Figure 3-2. A typical barrier application for the PSP . Local Hub Electrical Panel Exterior Wall Category 5 Primary or Secondary Surge Protectors Category 5 Primary Surge Protector To other building or floor Category 5 Primary or Secondary Surge Protectors ...
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Black Box SP251A - page 11
12 CATEGORY 5 PRIMARY AND SECONDARY SURGE PROTECTORS 3.2 Installation Procedures 3.2.1 C ONNECTING THE PSP OR SSP TO AN I/O P ORT Figure 3-3. Installing a Surge Protector . Cat. 5 patch cable to protected equipment (6 inches [15.2 cm] or less) Cat. 5 input from network Connection to chassis or safety ground ...
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Black Box SP251A - page 12
13 CHAPTER 3: Installation CAUTION! Surge energy may run both directions on the ground strap. To provide the best protection, it is essential that the ground strap on the Surge Protector be connected to the chassis ground of the protected device. Do not lengthen the Surge Protector’s ground strap or connect it to a ground other than chassis groun ...
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Black Box SP251A - page 13
14 CATEGORY 5 PRIMARY AND SECONDARY SURGE PROTECTORS These Category 5 Surge Protectors meet IEC standards 801.2, 801.4, and 801.5 (CE Mark). Table A-1. IEC Threat L evels as a F unction of Class Class Symmetrical Lines Coupling Mode Line = GND, Source Impedance = 42 ohms 1 1.0 kV at 24 A 2 1.0 kV at 24 A 3 2.0 kV at 48 A 4 N/A 5 4.0 kV at 95 A Surg ...
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Black Box SP251A - page 14
15 APPENDIX B: EIA/TIA TSB-40A Compliance all Table B-1. Results of TSB-40A Compliance Testing, Part 1: Typical Near-End Crosstalk Measurements NEXT Measurements for the Primary Surge Protector (SP250A) SOURCE/VICTIM PAIRS Freq. 1-2/3-6 1-2/4-5 1-2/7-8 3-6/4-5 3-6/7-8 4-5/7-8 SPEC (MHz) (dB) (dB) (dB) (dB) (dB) (dB) (dB) 1 >80 >80 >80 > ...
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Black Box SP251A - page 15
16 CATEGORY 5 PRIMARY AND SECONDARY SURGE PROTECTORS Table B-2. Results of TSB-40A Compliance Testing, Part 2: Typical Attenuation Measurements Attenuation Measurements for the Primary Surge Protector (SP250A) Freq. Pins 1-2 Pins 3-6 Pins 4-5 Pins 7-8 SPEC (MHz) (dB) (dB) (dB) (dB) (dB) 1 0.0 0.0 0.0 0.0 0.1 4 0.0 0.0 0.0 0.0 0.1 8 0.0 0.0 0.0 0.0 ...
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Black Box SP251A - page 16
17 APPENDIX B: EIA/TIA TSB-40A Compliance Table B-3. Results of TSB-40A Compliance Testing, Part 3: Typical Return-Loss Measurements Return-Loss Measurements for the Primary Surge Protector (SP250A) Freq. Pins 1-2 Pins 3-6 Pins 4-5 Pins 7-8 SPEC (MHz) (dB) (dB) (dB) (dB) (dB) 1 27.4 27.6 28.4 28.0 23 4 37.3 38.0 49.0 42.5 23 8 40.8 42.3 37.8 38.7 2 ...
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Black Box SP251A - page 17
NOTES ...
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Black Box SP251A - page 18
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 1996. Black Box Corporation. All rights reserved. ...
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