Lightning Arrestor For The Cisco 1240 Connected Grid Router
Lightning Arrestor for the Cisco 1240Connected Grid RouterLast Updated: February 2013Part Number: OL-26300-02This document describes the Cisco Lightning Arrestor kit (CGR-LA-NM-NF) for use on the Cisco 1240Connected Grid Router and provides instructions for mounting.This document covers the following topics: Introduction, page 1 Kit Contents, page 2 Accessory Kit, page 2 Technical Specifications, page 2 Warnings, page 3 Installation Considerations, page 4 Installing the Lightning Arrestor, page 4 Obtaining Documentation and Submitting a Service Request, page 6 Tell Us What You Think, page 6IntroductionThe Cisco Lightning Arrestor provides a level of safety protection to the user as well as to wirelessequipment by shunting to ground over-voltage transients induced into outdoor antennas and cables.These transients, in mild cases can produce interfering signals in a wireless system, and in extreme cases,can be dangerous and destructive.Overvoltage transients can be created through lightning static discharges, switch processes, directcontact with power lines, or through earth currents. The Cisco Lightning Arrestor limits the amplitudeand duration of disturbing interference voltages and improves the overvoltage resistance of in-lineequipment, systems, and components.Americas Headquarters:Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA
Kit ContentsThe Lightning Arrestor also provides the following benefits: Broadband operation DC continuity for outdoor powering Reversed installation Permanently installed gas capsuleThe lightning arrestor is necessary when installing an external antenna to the Cisco CGR 1240.Kit ContentsThe lightning arrestor kit (CGR-LA-NM-NF) contains the following parts: Lightning arrestor, nut, and washer Grounding lugAccessory KitUse the accessory kit (CGR-N-CONN) to convert from an integrated chassis-mounted antenna to anexternal antenna installation.This kit contains: Bulkhead-mounted MCX (female) to N (female) coaxial adapter, quantity of 2 N-type weather cap for temporary installation (if required) Coaxial cable assembly (LMR-100 or equivalent), RA-QMA(m) to RA-MCX (m), 17.5 inches,quantity of 2 Nylon cable tie wraps, 4 inches, quantity of 2Technical SpecificationsThe following are the technical specifications of the Lightning Arrestor:Table 1Feature Information for the Lightning ArrestorFeatureDescriptionArrestor TypeGas discharge tubeMain path connectorsPort 1: protected, N plug (male)Port 2: unprotected, N jack (female, bulkhead side)Impedance50 ohmsFrequency range0 MHz to 5800 MHzReturn lossGreater than or equal to 20 dBInsertion lossLess than or equal to 0.2 dBRF CW powerLess than or equal to 60 WLightning Arrestor for the Cisco 1240 Connected Grid Router2OL-26300-02
WarningsTable 1Feature Information for the Lightning Arrestor (continued)FeatureDescriptionSurge current handlingcapability10 single, multiple kA (test pulse 8/20 ms)Residual pulse energy250 microsecond typically (test pulse 4 kV 1.2/50 microsecond; 2kA8/20 microsecond), main path (protected side)Operating temperature range–40-degrees F to 185-degrees F (–40-degrees C to 85-degrees C)Waterproof ratingIP 67 (according to IEC 60529, data refer to the coupled state)Mounting and groundingMH24 (bulkhead)Material Housing: brass Port 1 center contact: gold-plated brass Port 2 center contract copper beryllium alleyWarningsWarningThis warning symbol means danger. You are in a situation that could cause bodily injury. Before youwork on any equipment, be aware of the hazards involved with electrical circuitry and be familiarwith standard practices for preventing accidents. Use the statement number provided at the end ofeach warning to locate its translation in the translated safety warnings that accompanied this device.Statement 1071SAVE THESE INSTRUCTIONSWarningDo not work on the system or connect or disconnect cables during periods of lightning activity.Statement 1001WarningThis equipment must be grounded. Never defeat the ground conductor or operate the equipment in theabsence of a suitably installed ground conductor. Contact the appropriate electrical inspectionauthority or an electrician if you are uncertain that suitable grounding is available. Statement 1024WarningOnly trained and qualified personnel should be allowed to install, replace, or service this equipment.Statement 1030Lightning Arrestor for the Cisco 1240 Connected Grid RouterOL-26300-023
Installation ConsiderationsInstallation ConsiderationsWe recommend that you bulkhead mount the lightning arrestor onto the router.The importance of obtaining a good ground and bonding connection cannot be overstressed. Considerthese points when grounding the lightning arrestor: Connect the lightning arrestor components directly to the chassis-mounted bulkhead connector. The contact points between the bulkhead connector and the lightning arrestor must be clean and freeof dust and moisture. Tighten threaded contacts to the torque specified by the manufacturer.Installing the Lightning ArrestorThe Cisco Lightning Arrestor must be bulkhead-mounted onto the router chassis. The lightning arrestormust be attached directly onto a well-grounded chassis through the threaded shaft of the lightningarrestor and the bulkhead adapter. See Figure 1.NoteThis part might be factory installed in an antenna port on the router when the router is shipped.NoteWhen you install the lightning arrestor, follow the regulations or best practices applicable to lightningprotection installation in your local area.WarningInstallation of the equipment must comply with local and national electrical codes. Statement 1074Figure 1Lightning Arrestor Detail12328447041Unprotected side N jack (to antenna)2Lightning arrestor3Protected side N plug (to radio)4N-bulkhead port (on host chassis)Lightning Arrestor for the Cisco 1240 Connected Grid Router4OL-26300-02
Installing the Lightning ArrestorTo Install the Lightning ArrestorTo install the lightning arrestor:Step 1Install the bulkhead N-connector adapter onto the appropriate antenna port on the router chassis. Tightento a 6-to-7 ft-lbs torque rating.Step 2Install the N-plug end of the lightning arrestor onto the top of the bulkhead N-connector). Tighten to a6-to-7 ft-lbs torque rating.128446921Step 3Lightning arrestor2N-bulkhead port (on host chassis)Install the N-plug end of your antenna cable onto the N-jack of the lightning arrestor. Tighten to a6-to-7 ft-lbs torque rating.Suggested CableWe recommend using a 20’ LMR-400 N(m)-N(m) low-loss coaxial cable (part numbersCAB-L400-20-N-N) or a 30’ LMR-600N (m)-N(m) very low-loss coaxial cable (CAB-L600-30-N-N).Lightning Arrestor for the Cisco 1240 Connected Grid RouterOL-26300-025
Obtaining Documentation and Submitting a Service RequestFor information on obtaining documentation, submitting a service request, and gathering additionalinformation, see What’s New in Cisco Product Documentation w/whatsnew.html.Subscribe to What’s New in Cisco Product Documentation, which lists all new and revised Cisco technicaldocumentation, as an RSS feed and deliver content directly to your desktop using a reader application. TheRSS feeds are a free service.Tell Us What You ThinkSend your feedback about this document directly to theConnected Energy Documentation Team.Connected Grid Documentation Feedback FormCisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list ofCisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners.The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Anyexamples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only.Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental. 2012-2013 Cisco Systems, Inc. All rights reserved.Lightning Arrestor for the Cisco 1240 Connected Grid Router6OL-26300-02
· The lightning arrestor is necessary when installing an external antenna to the Cisco CGR 1240. Kit Contents The lightning arrestor kit (CGR-LA-NM-NF) contains the following parts: † Lightning arrestor, nut, and washer † Grounding lug Accessory Kit Use the accessory kit (CGR-N-CONN) to
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