Industrial Ethernet User Guide
Contents
1. 0001101 1100011 10110 000111 10000 001100 WwW GAOT UNITED STATES Division Headquarters Americas 2200 U S Highway 27 South Richmond IN 47374 Phone 765 983 5200 Inside Sales 800 235 3361 Fax 765 983 5294 info belden com web www belden com Contact for Belden Brand 2200 U S Highway 27 South Richmond IN 47374 Inside Sales 1 800 BELDEN 1 1 800 235 3361 Phone 765 983 5200 Fax 765 983 5294 info belden com web www belden com Contact for Hirschmann and Lumberg Automation Brands 1540 Orchard Drive Chambersburg PA 17201 Phone 717 217 2200 Fax 717 217 2279 100111001101 j 00101 101 010 010111 foo a 01001111 OOOO 1001110 0000101010 TOLU 1010 0101 111 1 0l 01001 0 910 TI 001010 11010001100101 10010000 CANADA National Business Center 2280 Alfred Nobel Suite 200 Saint Laurent QC Canada H4S 2A4 Phone 514 822 2345 Fax 514 822 7979 D y Wie t INN AR Sov 0110101000 TAY LATIN AMERICA and the CARIBBEAN ISLANDS Regional Office 6100 Hollywood Boulevard Suite 110 Hollywood Florida 33024 Phone 954 987 5044 Fax 954 987 8022 salesla belden com Copyright 2011 Belden Inc Printed in U S A IEUGOO2 Rev 2 20112. The Instron crushing device Crushing Description of test The COTS cable is smashed flat and fails at 400 Ibs Commercial cable In this test an Instron machine head brings The blue COTS cable with a PVC jacket is a 2 x2 plate down on a segment of cable to crush it with failure defined as the point original shape It failed at 400 Ibs applied force smashed flat it will not spring back to its at which the cable would no longer support Cat 5e applications reliably To perform the test the cables were electrically connected Industrial cable By contrast the failure value for the Belden to test equipment to measure their electrical DataTuff 121700A black jacketed armored characteristics i e return loss and impedance industrial cable was over a ton 2 250 Ibs as the crush pressures were increasingly applied The test failure criteria for this test performed at ambient temperature were in accordance with TIA EIA Category 5e standard A battery of rigorous tests conducted at Belden show commercial cables will not perform as well as their industrial grade counterparts in factories or other harsh ii 4 fy 4 i environments 7 iA ee TS NO gt a The DataTuff cable fails only after a ton of crush pressure What the test results say Sometimes workers will step on a cable run over it with a vehicle or accidentally apply a crushing force in some way
3. Dimensions Mounting Approvals Vibration Shock Cooling System Resistance Data Throughput Switches Hubs Transceiver Firewall 0 C to 60 C standard with extended temp of 40 C to 85 C and conformal coating available 99 non condensing 100 using IP67 waterproof switches EN50082 2 Variety of voltages but 24 V redundant being the most common standard No internal Power Supply Media ring reconfig time lt 30ms and as low as 10 ms Multimode Single mode UTP STP Up to 68 miles longhaul single mode SNMP Simple Networking Management Protocol WEB Based Management Serial RS232 CLI command line interface EtherNet IP and PROFINET profiles for integration of management into PLC HMI Fault relay output s e g to PLC I O Port LED visual information SNMP trap to OPC server Plastic Metal Small e g 80x140x85 mm DIN rail Rack CE cUL 1950 UL508 FCC Part 15 Germanic Lloyd Class 1 Div 2 IEC 61850 3 IEEE 1613 NEMA TS2 EN 50121 4 EN 50155 2g IEC 60068 2 6 FC 15g IEC 60068 2 27 Fan less operation RFI EMI dust oil even IP67 10Mb 100Mb 1Gb 10Gb Yes DIN rail 19 rack and hard mount Yes DIN rail Yes DIN rail Yes DIN rail Typical Office grade Ethernet Hardware 0 C to 40 C Typically 10 85 non condensing EN50082 1 120 240 V Internal Power Supply Depending upon topology possibly significantly more Multimode Single mode
4. BELDEN SENDING ALL THE RIGHT SIGNALS Industrial Ethernet User Guide Featured Brands Tests Prove Belden is the Best Choice for Industrial Ethernet BELDEN Network Applications fh HIRSCHMANN A BELDEN BRAND BELDEN SENDING ALL THE RIGHT SIGNALS Achieving a goal of 99 999 reliability S demands products with a proven reputation gt j for reliability products from Belden 7 s g Belden s Complete Industrial Solutions Fz Pi a W N increase the reliability factor at every i critical stage of your process Sy A SY ye Qe oe wN Can Commercial Ethernet Hardware and Cables Really Meet the Network Needs of an Industrial Environment The Answer is No The office and the industrial environment couldn t differ more especially when you consider the level of stress they place on Ethernet cabling systems or how environmental conditions can adversely affect active devices An office grade environment offers switches hubs and cabling systems a relatively safe harbor but the industrial world presents a far more harsh and hazardous environment Bringing commercial off the shelf COTS cabling products and switches into the industrial landscape carries high risks for industrial and mission critical applications Consider the Costs of Network Failure If a commercial Ethernet switch or cabling system fails in an industrial envir
5. If the cable is a COTS its performance will likely be degraded or fail By contrast an industrial cable especially an armored product can sustain significantly more crushing force and keep working BELDEN SENDING ALL THE RIGHT SIGNALS Nine Important Tests continued Cut through Description of test In this test based on CSA standard 22 2 a chisel point mandrel on an Instron machine was lowered onto a segment of cable This test reveals the susceptibility of a cable to having its conductor exposed after being cut which directly relates to a cable s vulnerability to short circuits and therefore safety In practice the cable was cut through by the chisel to the point where a short circuit was sensed across the conductors by means of a lead attached from the cable to the fixture i e a simple continuity test was carried out Commercial cable Cables examined in this test included the COTS product which shorted out at 92 Ibs applied force High Temperature Description of test In this test three spools of cable were suspended from a mandrel in a high temperature oven the blue cable in the middle is a COTS cable with a standard Cat 5e PVC jacket and the other black jacketed cables are industrial grade Belden Dataluff 7928A cable with an FEP jacket and 7922A cable with a PVC jacket These cables were first tested for signal attenuation at an ambient temperature 20 C and were then tested again
6. after being exposed to a high temperature over time 60 C In the chart to the right the solid black line represents a performance specification for an ideal Cat 5e cable Signal attenuation curves must lie on or above this target line for the cables to be considered to be working properly a Industrial cable Unarmored Dataluff cables showed the following results 7923A took 205 Ibs applied force to short 11700A took 346 Ibs to short And Belden s 121700A armored industrial cable took 346 Ibs applied to pierce the armor however the conductors themselves did not short until a force of 1 048 lbs was applied What the test results say It takes considerably more applied force to puncture an armored industrial cable than a commercial off the shelf product If a commercial grade Ethernet cable is tightly wrapped around a sharp cutting edge or is run into by say the sharp corner of the blade on a forklift truck it only takes a force on the order of 90 Ibs or less to functionally damage the cable Once it s out of commission the entire network may go with it Commercial cable The COTS cable functioned acceptably at 20 C but over time at 60 C attenuation increased to where the cable would not support a run distance of 100 meters Industrial cable Even after exposure to 60 C over time the industrial grade cable continued to support the maximum run distance What the test results say In envir
7. coiled up into a dry container and water was added to submerge them To determine electrical performance the cables were tested over time up to six months immersed in water The graphs plot signal attenuation over a range of frequencies with data taken when the cables were first placed in water and six months later The solid black line shows the Category 5e performance requirement a kind of ideal reference standard Commercial cable After half a year it s evident the commercial grade Cat 5e cable is failing to meet its expected performance level In fact remarkably as soon as the cable was placed in water it showed increased attenuation after six months the attenuation continued to degrade Industrial cable The DataTuff 7934A chart shows that the performance requirement solid black line was not only met but initially exceeded After six months there was only slight attenuation increase and the cable still exceeded the Cat 5e requirements What the test results say Water can breech the jacket of a commercial grade cable by permeating areas of the jacket material or by seeping through pinholes Once that happens the dielectric constant can change enough to degrade the attenuation performance In some cases the cable s conductors can short out though before that occurs you d likely have a loss of communication The effect is insidious in that it can build up over time even though the cable
8. the weakness in a cable jacket induced by oil exposure is combined with a crushing force or an impact events that are not at all unlikely in an industrial environment a brittle cable will offer essentially no resistance to damage to UV discoloration Color degradation Is also a precursor of the degradation of the plastic material of the jacket When the jacket begins to decompose its mechanical properties are likely being compromised too including elongation and tensile strength As the jacket falls apart the cable becomes susceptible to water or moisture permeation and the situation is only worsened when the UV weakened jacket is simultaneously stressed by effects like abrasion cut through etc Industrial cable Belden s DataTuff cables have a broad range of UV resistant jackets What the test results say In an industrial environment with UV present it s important to use a cable with a jacket that resists damage to radiation This is especially critical when the cable will see application outdoors or be located near a window or other UV sources The oil bath test conducted as specified in UL 1277 The UV exposure test is based upon ASTM procedures BELDEN SENDING ALL THE RIGHT SIGNALS Nine Important Tests continued Water Immersion Description of test Here the electrical properties of the cables primarily signal strength were measured as the cables were received then they were
9. Belden s Hirschmann industrial grade products have undergone extensive testing to ensure they operate in the many applications they have been deployed to meet In addition after many years in the field these active devices have held up and continue to operate reliably The commercial counterparts of the Hirschmann line have been analyzed and evaluated for direct comparison to our industrial grade components The table to the right provides a useful guide to review the differences between commercial grade and industrial grade active devices hi a mo FEF n i a a me j am i5 ce f al z Mo on 5 T gt ae aS He ee i z j One of the greatest values in using a Hirschmann Ethernet networking device in harsh and mission critical environments is not only the ability to provide maximum network availability but to also meet the stringent industry standard protocol and certification requirements Hirschmann devices utilize redundant low power inputs and circuitry components that permit these devices to meet the requirements of Class 1 Division 2 Characteristics Comparison Hirschmann Industrial Ethernet Hardware vs Typical Office grade Ethernet Hardware Characteristics Hub Switch Fiber Interfaces Hirschmann Industrial Ethernet Hardware Operating Temperature Humidity EMC Operating Voltage Redundancy Link Media Communication Distances Management Diagnostics Chassis Material
10. UTP STP Up to 68 miles longhaul single mode SNMP Simple Networking Management Protocol WEB Based Management Serial RS232 CLI command line interface LED visual information Plastic Metal Medium e g 440x70x380 mm Desktop Rack CE cUL Typically not rated tested Typically not rated tested Fan Operation Dust 10Mb 100Mb 1Gb 10Gb Yes 19 rack or tabletop Yes 19 rack or tabletop Yes 19 rack or tabletop Yes 19 rack or tabletop BELDEN SENDING ALL THE RIGHT SIGNALS Tests prove the effectiveness of Belden cables and patch cords in an industrial environment Comparing Commercial and Industrial Cabling Belden has done extensive testing to compare both the physical and electrical performance of commercial off the shelf COTS cables versus industrial cables The results of each test shown on the following pages clearly indicate why a commercial grade cable is never suitable for the wide variety of extreme conditions that can be at play in an industrial environment Here the cables are being connected to a switching mechanism that allows the interconnections to be made automatically Above the switching mechanism a network analyzer makes swept frequency measurements Above that a DC resistance and Capacitance meter To conduct these tests Belden used their state of the art test equipment and proprietary test software It s important to note that all the cables in this stu
11. ct range is outstanding including e Dataluff Category 5e and Enhanced Category 5e Twisted Pair Cables unshielded and shielded with heavy duty oil and UV resistant jackets e Dataluff Category 6 Twisted Pair Cables unshielded with heavy duty oil and UV resistant jackets e DataTuff Upjacketed and Armored Cables for the more extreme environments e Dataluff Category 5e Continuous Flex Cable rated to 10 million cycles and featuring weldsplatter resistant TPE jackets e Dataluff IP67 and IP20 RJ45 Cordsets e Dataluff IP67 Modular Jacks RJ45 UTP or FIP e DataTuff Plug Kits IP67 RJ45 UTP or FTP e Dataluff Surface Mount Boxes IP67 with Stainless steel covers e DataTuff Stainless Steel Faceplates IP67 To complete the cabling system you ll need the reliability inherent in the following copper connectivity products e RJ45 and Micro M12 Cordsets for EtherNet IP PROFINET or MODBUS TCP e Hirschmann Field attachable Connectors for EtherNet IP e Hirschmann Panel mount Adaptors and Receptacles for EtherNet IP and MODBUS TCP And if you are looking for an optical fiber system solution consider the following Belden products e TrayOptic Heavy duty Indoor Outdoor Laser optimized Optical Fiber Cables suitable for use in both risers and trays and available in 2 to 72 fiber constructions e FiberExpress 2 or 6 fiber cables in tight buffered 62 5 um FX300 and 50 um FX600 multimode constructio
12. dy initially tested as fully compliant to the TIA EIA Category 5e standards i e they were validated to be good when the test began Nine Important Tests 1 The test set up with the cables on a fixed drum covered with sandpaper Abrasion Description of test In this ambient temperature test the surface of a fixed drum was covered with rough sandpaper and the cables stretched across a portion of its circumference then moved back and forth cyclically with the cable driven on one end by a reciprocating arm while a suspended weight on the other end applied tension A counter logged the cycle count 2 Commercial cable after 25 cycles Commercial cable After 25 cycles the conductors of a commercial Cat 5e cable could be seen through breaks in the jacket In other words due to abrasion damage from 25 cycles on the drum this cable began to lose mechanical and electrical integrity Industrial cable Belden s Dataluff Industrial Ethernet cable 121700A an armored cable was tested The mechanical and electrical integrity of the cable was never compromised 3 Industrial cable after 25 cycles What the test results say If a COTS cable s jacket is compromised by abrasion the cable might still be capable of communication but it certainly won t be stable on a long term basis Eventually a catastrophic short circuit becomes likely arcing could occur which would b
13. e a safety issue Belden s Dataluff cables last much longer than COTS cable in an environment where cable jacket abrasion is a risk BELDEN SENDING ALL THE RIGHT SIGNALS Nine Important Tests continued In the cold bend test the cables were first placed into a cold box Cold Bend Description of test In this test carried out per UL 444 samples of cables were left in a controlled temperature and humidity environment chamber called a cold box They remained that way for one hour to get them conditioned to the temperature of the test three temperatures were looked at 80 C 60 C and 40 C The cables were then partially wound around a 3 inch diameter horizontal mandrel with one end of the cables under tension from an aluminum weight a cold bend test They were then immediately unrolled and visually inspected to look for cracks in the jacket Then they were partially wound around a mandrel and subjected to the tension experienced through the use of an aluminum weight Commercial cable The commercial grade cables became brittle and cracked by the exposure to these cold temperatures Industrial cable The 7928A DataTuff Industrial Ethernet cable was taken down to 80 C and bent without cracking the jacket What the test results say Commercial grade Ethernet cables are fine for the climate controlled environment of the office but will fail as they become embrittled by exposure to cold tem
14. ns suitable for use in plenums Or single mode constructions featuring either 2 or 6 fiber constructions For the utmost in connectivity FiberExpress Duplex patch cords are offered in e Single mode versions e 62 5 um FX300 and 50 um FX600 multimode versions suitable for use in riser applications These patch cords are to be used in conjunction with the following connector types ST ST SC SC LC LC and LC ST Visit our web site at www belden com industrial The FiberExpress line also includes for more product information e Rack mount Patch Panels or to find a Belden sales associate e Wall mount Patch Panels or a distributor near you e Single mode and Multimode Universal Optical Adapter Strips e FiberExpress Brilliance the industry s most innovative simple to use and reliable field installable optical fiber connector For worldwide Industrial Sales and Technical Support visit www belden com industrial 100 74911001010 1001 100 16 c Ho 7 ia Meloy Wale E Wa TLL 100101 ol 1100 1110 100 9910 oral 1 10000100 ZR G00 iiyat0 44701110001 a 0010 K 10110 NOT 0 rog 0 1000111000110 00107 1 0101 10011110101 o1 1a 10010 0111010 10 00 0110 11000100 patti ool onoi o 101110 00 mort 10 0 o 11 1 ON i01 1001 0Oo 1 1110101100101 0001 0 010P 0100100001010000 001101 000111 4001011100100 100104 aoogio1o101 011 gga O 0 00101100111011101GS gt ae 110100111 100 108
15. onment the real cost to the manufacturer is typically much more than just the replacement cost of the components In fact the cost of the parts themselves are typically only a fraction of the cost involved The real cost may be much broader e Downtime in an automotive assembly plant capable of producing one vehicle per minute could equate to a 2 000 to 3 000 per minute loss of profits for small car production and up to 8 000 per minute for SUV and pick up truck production e A greater need for repetitive repairs if the cable or switch performance is intermittent e A loss of worker or environmental safety What costs would your company incur in terms of liability if a poorly chosen switch or cable fails in a safety critical application Belden s end to end Ethernet Solution called Complete Industrial Solutions provides five 9s reliability Belden Leads the Way in Providing System Reliability Maximum Uptime Belden is a long standing leader in industrial Ethernet signal transmissions offering products and systems that provide 99 999 reliability even considering the following environmental circumstances e Temperatures that can range from 40 C to 85 C e Exposure to solvents lubricants and other strong chemicals e Exposure to UV radiation e Humidity conditions up to 99 e Exposure to dust and oil e Exposure to vibration and shock In addition the cables in an industrial environ ment are m
16. onmental Issues Industral Grade Jacket Grade Jacket No of Installation UV Weld P Pairs Oil Gasoline Hi Lo Unshielded Shielded Stranded Stress Sunlight Splatter Heavy Armored ste Resistance T ae Resistance Resistance Resistance it ee oor Resistance Temp Category 5e Cable 7932A 2 20 Etheriat IP 7933A 2 20 Etheri ai IP 7923A 4 40 6 Etheri ai IP 7918A 4 6 35 7924A 4 40 7930A 4 25 7922A 4 40 PLTC 7934A 4 40 Etheriet IP 7937A 4 40 Gap 7939A 4 40 7928A 4 O 40 Etheriet IP 11700A 4 40 Etheriisi IP 11700A2 4 O 40 Oil Res I amp II 121700A 4 6 O 40 121700R 4 40 7929A 4 6 35 7919A 4 25 O 7921A 4 15 Etheriisi IP 7935A 4 40 Etheriet IP 7936A 4 40 CSD 7938A 4 50 O High Flex Category 6 Cable 7927A 4 45 7931A 4 40 7940A 4 45 Etheri i IP 11872A 4 45 GED 7953A 4 45 Etheri e IP 121872A 4 45 Shielded products are recommended for high noise environments Stranded products are recommended where more flexibility is needed m Products with Bonded Pair
17. onments where your Ethernet cable will be located in an area with a very high ambient temperature or located near a high temperature source a commercial off the shelf cable will simply not be able to maintain an acceptable level of performance A chisel point mandrel on an Instron machine performs the cut through procedure COTS vs 7928A vs 7922A Cat 5e Attenuation at 20 C and 60 C Anen D Freq MHz The industrial grade cable showed little attenuation even at 60 C The cables were tested as suspended in a high temp oven Oil Resistance Description of test In this test conducted per UL 1277 lengths of cable were immersed in containers of oil which in turn were immersed in a water bath that was put into a chamber held at 125 C for 60 days The blue cable in the photo is a commercial grade product and the black one is an industrial grade Dataluff cable After the 60 day test period the cable segments were removed and their jackets evaluated for tensile and elongation properties Commercial cable Exposure to oil can make the jacket of a commercial grade cable brittle and fragile even at room temperature with a resulting loss in mechanical properties like tensile strength and elongation In other words the service life of a COTS cable can be diminished by oil exposure even in normal heat conditions Things get UV Exposure Description of test In this ASTM procedure based tes
18. ore likely to experience pulling forces far beyond those of the initial installation process as equipment is rearranged on the plant floor Most Belden DataTuff cables however feature Bonded Pair technology Belden s patented unshielded twisted pair construction that affixes the conductor insulation of the cable pairs along their longitudinal axes to ensure that no performance robbing gaps develop between the conductor pairs Since no gaps can occur and the conductor to conductor spacing or centricity is always uniform the cable offers excellent and consistently reliable electrical performance Belden calls this unique capability Installable Performance Bonded Pair Nonbonded pair Installed and manipulated nonbonded pairs left have a tendency to gap varying the centricity of the two conductors Belden Bonded Pairs right do not gap so the physical integrity of the pair is maintained Belden Means Peace of Mind Peace of mind is at hand with Belden leading edge zero downtime networking hardware cabling and connectivity products In fact only Belden offers fully integrated end to end Ethernet systems for your mission critical or environmentally challenged facility Belden is your Ethernet Solution BELDEN SENDING ALL THE RIGHT SIGNALS The Hirschmann line of Ethernet networking hardware has been proven reliable in even the harshest environments Comparing Commercial and Industrial Switches
19. peratures In the test described here Belden s engineers couldn t get this industrial cable cold enough to crack its jacket In the cold impact test after the cable is cooled an aluminum weight smashes against it Cold Impact Description of test In this test conducted per UL 444 an aluminum weight was dropped down a hollow guide tube to smash against a segment of cable under test the cable had been previously cooled The impact force delivered 24 in lbs or 2 7 joules of impact energy Ten samples were inspected at a series of increasingly lower temperatures The failure mechanism here was similar to that experienced in the abrasion test or the cold bend test wherein jacket integrity is lost allowing the ingress of chemicals or moisture This could lead to a conductor to conductor short plus the cable could short to any other metallic object it makes contact with There could also be catastrophic failure in electrical performance Commercial cable The commercial cable failed at 20 C Industrial cable The 7928A high low temp DataTuff cable jacket did not crack until impacted at 70 C What the test results say In an industrial arena cold temperatures can sometimes combine with mechanical shock or collision to damage a cable s jacket Commercial Ethernet cable designed for relatively light stresses in benign environments is simply not built to withstand cold impact as it becomes susceptible to cracking
20. t ASTM G 154 Standard Practices for Operating Fluorescent Light Apparatus for UV Exposure of Non Metallic Materials segments of various cables were affixed to panels that were mounted so that the cable segments faced inward toward a fluorescent UV light source whose output range was adjusted to match that of solar radiation levels The circular artifacts shown are retaining springs The samples were exposed to the light for 720 hours 30 days When the cable segments were removed they were visually checked for discoloration and then the jacket was checked for tensile strength and elongation Commercial cable Like most commercial grade cables this cable s jacket was not sunlight resistant Therefore the light colored COTS cable in the photo at right shows the first symptom of excessive exposure worse from there If a commercial cable is exposed to oil long enough and at high enough temperatures its jacket can swell and blister and eventually fall apart In the process the geometry of the cable is changed and along with it the dielectric constant and related electrical properties Industrial cable The jacket materials and jacket thicknesses on Belden Dataluff cables are appropriate for exposure to oil at elevated temperatures such as lubricants or cutting fluids What the test results say With a COTS cable short circuits and catastrophic failure are possible with a resulting loss in communication When
21. technology provide Installable Performance advantages refer to Belden s Bonded Pair Capabilities Bulletin CB006 BELDEN SENDING ALL THE RIGHT SIGNALS Belden is at the top of its game in signal transmission technology For Reliable Performance in Tough Environments Unparalleled Networking Hardware The Hirschmann line of industrial networking devices manages virtually every communication connection requirement among the various layers of the network information control and device And the line includes products that support both copper and optical fiber media with data speeds as high as 10 Gigabits per second These networking devices will also ensure hassle free and secure data communication under the toughest conditions Key active components include Fieldbus communication hardware and the following industrial Ethernet products e Hirschmann Backbone Switches e Hirschmann Managed Rack mount Switches e Hirschmann Managed DIN Rail mount Switches e Hirschmann Unmanaged DIN Rail mount Switches e Hirschmann Hard mount IP67 Switches e Hirschmann Layer 3 Routing Firewall Switches e Hirschmann Wireless Solutions e Hirschmann Office Enterprise Switches e Hirschmann Network Management Software Uncompromising Media To ensure optimum industrial plant performance the Dataluff line of copper cables and connectivity provides the performance you are looking for the reliability you need And our Dataluff produ
22. worked fine initially E In the controlled environment of an office moisture exposure is not a concern That s not true in many industrial applications however like those where the cable is submerged in a tank placed in troughs or below grade trays or exposed to rain or water on a continual basis There an industrial grade cable is essential In addition industrial grade not commercial grade cables are called for in applications where a cable is to be buried underground There might be a situation where remote outdoor consoles send signals back to a master location via a buried cable Ethernet cables are common in many transportation scenarios as well such as in railways and subways Moisture is a concern in all of these situations and only an industrial grade burial flooded cable is acceptable The water bath test is a six month long test with the cables fully submerged in water Commercial Cat 5e Attenuation in Water Atten dB Atten dB Freq MHz Cat5e 0Days _ 6 Months Cat 5e 0 Days 6 Months 0Days 6 Months A six month long test fully submerged in water top chart depicts the extensive attenuation degradation of the COTS cable the bottom chart shows the superior performance of Belden DataTuff 7934A DataTuff Industrial Ethernet Cable Selection Guide This chart is meant to help the user in proper cable selection instalation Envir
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