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? phoenix contact 2011-01-26 2732_en_d automation fl switch sfn? data sheet 1description the fl switch sfn? range of factory line switches with standard functions in numerous versions can be used for quick and cost-effective ethernet network expansion to the field level. due to their narrow housing design, the components are suitable for un iversal remote use in control cabinets and junction boxes. the switches have five or eight ports, up to two of which are gl ass fiber ports provided in sc or st format. the switches support the auto negotiation function at the twisted pair ports and offer transmission speeds of 10/100/1000 mbps depending on the switch version. mixed operation for the connection of segments with different data transmissi on speeds is also supported. the glass fiber ports only support 100 mbps or 1000 mbps (gigabit version). the rj45 ports offer an auto crossing function, which means it is not necessary to make a distinction between 1:1 and crossover cables. the fiber optic ports can be used to extend the segment length up to 20 km. unused rj45 ports can be fitted with security caps to provide me chanical protection against unauthorized use. the fl switch sfn?gt? switches offer additional gigabit performance, alarm contact and redundant power input capability. 2features ? increased network performance ? switched ethernet reduces traffic and non predictable timing ? quality of service: pretagged high priority messages are forwarded before lower priority messages during periods of high network traffic loading ? gigabit options for data intensive applications ? gigabit switches support jumbo frames up to 9600 bytes per frame ? easy network expansion ? no configuration of the switch ? auto negotiation and autocross simplify cabling ? coupling copper network segments with different bit rates with automatic detection of the data transmission speed of 10 mbps, 100 mbps or 1000 mbps depending on the switch version ? fiber optic options extend di stance and electrical noise immunity ? 1- or 2-port options ? sc or st connector options ? multimode or singlemode option ? low cost, low complexity security (optional) ? connect layer 1 security el ements at the rj45 port to restrict access or tampering please note the different connection di rections of the transmission media for five-port switches : copper cables are connected at the front , glass fiber cables at the bottom . make sure you always use the latest documentation. it can be downloaded at www.phoenixcontact.net/catalog . this data sheet is valid for all pr oducts listed on the following page: five- and eight-port sta ndard function ethernet switches with na rrow housings ? gigabit as an option
fl switch sfn? 2732_en_d phoenix contact 2 ? no software setup needed 3ordering data ethernet switches with 10/100 mbps ethernet switches with 10/100/1000 mbps (gigabit) description type order no. pcs./pkt. ethernet switch with 5 rj45 ports for 10/100 mbps fl switch sfn 5tx 2891152 1 ethernet switch with 4 rj45 ports and 1 fiber optic port in sc format for 10/100 mbps fl switch sfn 4tx/fx 2891851 1 ethernet switch with 4 rj45 ports and 1 fiber optic port in st format for 10/100 mbps fl switch sfn 4tx/fx st 2891453 1 ethernet switch with 8 rj45 ports for 10/100 mbps fl switch sfn 8tx 2891929 1 ethernet switch with 7 rj45 ports and 1 fiber optic port in sc format for 10/100 mbps fl switch sfn 7tx/fx 2891097 1 ethernet switch with 7 rj45 ports and 1 fiber optic port in st format for 10/100 mbps fl switch sfn 7tx/fx st 2891110 1 ethernet switch with 6 rj45 ports and 2 fiber opti c ports in sc format fl switch sfn 6tx/2fx 2891314 1 ethernet switch with 6 rj45 ports and 2 fiber optic ports in st format for 10/100 mbps fl switch sfn 6tx/2fx st 2891411 1 description type order no. pcs./pkt. ethernet switch with 8 rj45 ports for 10/100/1000 mbps fl switch sfn 8gt 2891673 1 ethernet switch with 7 rj45 ports for 10/100/1000 mbps and 1 fiber optic port in sc format (multi-mode), 850 nm up to 550 m distance fl switch sfn 7gt/sx 2891518 1 ethernet switch with 6 rj45 ports for 10/100/1000 mbps and 2 fiber optic ports in sc format (multi-mode), 850 nm up to 550 m distance fl switch sfn 6gt/2sx 2891398 1 ethernet switch with 6 rj45 ports for 10/100/1000 mbps and 2 fiber optic ports in sc format (single mode), 1310 nm up to 10 km distance fl switch sfn 6gt/2lx 2891987 1 ethernet switch with 6 rj45 ports for 10/100/1000 mbps and 2 fiber optic ports in sc format (single mode), 1310 nm up to 20 km distance fl switch sfn 6gt/2lx-20 2891563 1 accessories description type order no. pcs./pkt. universal end clamp e/ns 35 n 0800886 50 dust protection caps for rj45 female connectors fl rj45 protect cap 2832991 10 patch angle with 2 ports in cat 5e fl pf 2tx cat5e 2891165 1 patch angle with 8 ports in cat 5e fl pf 8tx cat5e 2891178 1 patch angle with 2 ports in cat 6 fl pf 2tx cat6 2891068 1 patch angle with 8 ports in cat 6 fl pf 8tx cat6 2891071 1 patch angle with security elements for 2 ports in cat 5e fl pf sec 2tx 2832687 1 patch angle with security elements for 8 ports in cat 5e fl pf sec 8tx 2832690 1 patchbox 8 x rj45 cat 5e, pre-assembled, can be retrofitted fl pbx 8tx 2832496 1 patchbox 6 x rj45 cat 5e and 4 sc-r j, glass pre-assembled, can be retrofitted fl pbx 6tx/4fx 2832506 1 patch cable, cat 5, pre-assembled, 0.3 m long fl cat5 patch 0,3 2832250 10 patch cable, cat 5, pr e-assembled, 0.5 m long fl cat5 patch 0,5 2832263 10 patch cable, cat 5, pre-assembled, 1.0 m long fl cat5 patch 1,0 2832276 10 patch cable, cat 5, pr e-assembled, 1.5 m long fl cat5 patch 1,5 2832221 10 patch cable, cat 5, pre-assembled, 2.0 m long fl cat5 patch 2,0 2832289 10 patch cable, cat 5, pr e-assembled, 3.0 m long fl cat5 patch 3,0 2832292 10 patch cable, cat 5, pre-assembled, 5.0 m long fl cat5 patch 5,0 2832580 10 patch cable, cat 5, pr e-assembled, 7.5 m long fl cat5 patch 7,5 2832616 10 patch cable, cat 5, pre-assembled, 10.0 m long fl cat5 patch 10 2832629 10 security set for 4 rj45 ports fl sec pac 4tx 2832865 4 security frame for sfn switch and patch fields, green fl plug guard, gn 2891615 20
fl switch sfn? 2732_en_d phoenix contact 3 4 technical data security frame for sfn switch and patch fields, red fl plug guard, rd 2891712 20 security frame for sfn switch and patch fields, white fl plug guard, wh 2891819 20 security frame for sfn switch and patch fields fl port guard 2891220 20 security frame for sfn switch and patch fields fl plug guard key 2891327 1 security element for fl cat patch fl patch safe clip 2891246 20 general data function switch/repeater; conforms to standard ieee 802.3 latency of the communication processor 8 s plus frame time housing dimensions (width x height x depth) 5-port switch, without connectors 8-port switch, without connectors 30 x 120 x 100 mm (without combicon/without fiber optics) 50 x 120 x 100 mm (without combicon/without fiber optics) operating temperature fl switch sfn ?tx? and fl switch sfn 6gt/2lx-20 fl switch sfn 8gt, fl switch sfn 6gt/2sx, fl switch sfn 7gt/sx fl switch sfn 6gt/2lx 0 to 60c -25 to 75c -25 to 60c storage temperature fl switch sfn?tx? switches fl switch sfn?gt? switches (not fl switch sfn 6gt/2lx-20) fl switch sfn 6gt/2lx-20 -20 to 70c -35 to 85c -20 to 70c degree of protection ip20, din 40050, iec 60529 protection class class 3 vde 0106; iec 60536 humidity (operation and storage) 5% to 95%, no condensation air pressure (operation) 86 kpa to 108 kpa, 1500 m above sea level air pressure (storage) 66 kpa to 108 kpa, 3500 m above sea level mounting ns 35 (en 60715) preferred mounting position perpendicular to a standard din rail connection to protective ground snapped onto a grounded din rail weight, without connectors 5-port switch 8-port switch 265 g 440 g accessories description type order no. pcs./pkt. supply voltage (us) connection type removable combicon, screw-cage connector wire size (solid/stranded/awg) 0.2 to 2.5 mm2 / 0.2 to 2.5 mm2 / 24 to 12 awg recommended pe wire size 2.5 mm2 nominal power supply 12 or 24 v dc permissible ripple 3.6 v pp within the permissible voltage range permissible voltage range 9vdc to 30.2vdc test voltage 500 v dc for one minute protection against polarity reversal present
fl switch sfn? 2732_en_d phoenix contact 4 current consumption and inrush current current consumption (max) inrush current fl switch sfn 5tx 90 ma (24 v dc)/205 ma (9 v dc) 2.3 a for 3 ms fl switch sfn 4tx/fx 140 ma (24 v dc)/405 ma (9 v dc) 2.4 a for 2 ms fl switch sfn 4tx/fx st 140 ma (24 v dc)/405 ma (9 v dc) 2.9 a for 2 ms fl switch sfn 8tx 140 ma (24 v dc)/340 ma (9 v dc) 3.1 a for 2 ms fl switch sfn 7tx/fx 190 ma (24 v dc)/480 ma (9 v dc) 3.4 a for 2 ms fl switch sfn 7tx/fx st 190 ma (24 v dc)/480 ma (9 v dc) 3.4 a for 2 ms fl switch sfn 6tx/2fx 230 ma (24 v dc)/610 ma (9 v dc) 3.6 a for 2 ms fl switch sfn 6tx/2fx st 230 ma (24 v dc)/610 ma (9 v dc) 3.3 a for 2 ms fl switch sfn 8gt 430 ma (24 v dc)/1010 ma (9 v dc) 3.1 a for 3 ms fl switch sfn 7gt/sx 320 ma (24 v dc)/900 ma (9 v dc) 4.2 a for 3 ms fl switch sfn 6gt/2sx 350 ma (24 v dc)/960 ma (9 v dc) 4.4 a for 3 ms fl switch sfn 6gt/2lx 360 ma (24 v dc)/950 ma (9 v dc) 4.4 a for 3 ms fl switch sfn 6gt/2lx-20 360 ma (24 v dc)/990 ma (9 v dc) 4.4 a for 3 ms interfaces total number of rj45 ethernet interfaces 5/8 mac address table size (entries) 1 k (4, 5, 8 tx versions), 8 k (all others) properties of rj45 ports number 4/5/6/7/8 connection format 8-pos. rj45 female connector on the switch connection medium twisted-pair cable with a conductor cross section of 0.14 mm 2 to 0.22 mm 2 cable impedance 100 transmission speed 10/100 mbps or 10/100/1000 mbps maximum network segment length 100 m properties of fiber optic ports number 0/1/2 connection format 100 mbps 1000 mbps sc duplex or st female connector sc duplex fiber type glass laser protection class 1 according to din en 60825-1:2001-11 properties of 100 mbps multimode transmission rate 100 mbps full duplex wavelength 1300/1310 nm maximum transmission length, including 3 db system reserve and 1.5 db connector loss 5.4 km glass fiber with f-g 50/125 0.7 db/km f1200 2.4 km glass fiber with f-g 50/125 1.6 db/km f800 10.4 km glass fiber with f-g 62.5/125 0.7 db/km f1000 2.8 km glass fiber with f-g 62.5/125 2.6 db/km f600 transmission power (medium type) dynamic (average) minimum maximum -23.5 dbm (50/125 m) / -20 dbm (62.5/125 m) -14 dbm (50/125 m) / -14 dbm (62.5/125 m) transmission power (medium type) static minimum maximum -22.5 dbm (50/125 m) / -19 dbm (62.5/125 m) -14 dbm (50/125 m) / -14 dbm (62.5/125 m) receiver sensitivity minimum maximum -31 dbm (dynamic) / -31 dbm (static) -14 dbm (dynamic) / -14 dbm (static) properties of 1000 mbps multimode transmission rate 1.25 gbps full duplex wavelength 850 nm
fl switch sfn? 2732_en_d phoenix contact 5 maximum transmission length 550 m (50/125 m) 220 m (62.5/125 m) transmission power minimum maximum -9.5 dbm -4 dbm receiver sensitivity minimum maximum -17 dbm -3 dbm properties of 1000 mbps single mode transmission rate 1.25 gbps full duplex wavelength 1310 nm maximum transmission length fl switch 6gt/2lx fl switch 6gt/2lx-20 10 km (9/125 m) 20 km (9/125 m) transmission power minimum maximum -10 dbm -3 dbm receiver sensitivity minimum maximum -24 dbm -0 dbm alarm contacts (fl switch sfn?gt? only) voltage 24 v dc typical current carrying capacity 100 ma maximum including inrush interfaces (continued) mechanical tests shock test according to iec 60068-2-27 operatio n: 25g, 11 ms period, half-sine shock pulse storage/transport: 50g, 11 ms period, half-sine shock pulse vibration resistance according to iec 60068-2-6 operation/storage/transpor t: 5g, 150 hz, criterion 3 free fall according to iec 60068-2-32 1 m conformance with emc directives developed according to iec 61000-6-2 iec 61000-4-2 (esd) criterion b iec 61000-4-3 (radiated-noise immunity) criterion a iec 61000-4-4 (burst) criterion a iec 61000-4-5 (surge) criterion b iec 61000-4-6 (conducted noise immunity) criterion a iec 61000-4-8 (noise immunity against magnetic fields) criterion a en 55022 (noise emission) class a approvals fl switch sfn?tx? switch c u rohs eee 2002/95/ec, weee 2002/96/ec, u class i, division 2, groups a, b, c, d temp code t5 installed in minimum ip54 enclosure fl switch sfn?gt? switch c u rohs eee 2002/95/ec, weee 2002/96/ec u class i, division 2, groups a, b, c, d temp code t4 installed in minimum ip54 enclosure
fl switch sfn? 2732_en_d phoenix contact 6 5overview 5.1 5-port versions the housings of the 5-port vers ions are identical. port 5 is located on the bottom. figure 1 housing examples for 5-port switches differences compared to previous versions 7267 version 00 - first version 7267 version 01 - update gigabit, supply voltag e, current consumption, surge and approvals 7267 version 02 - update 1000 mbps multimode 2732 document number was 7267 - added jumbo frame content, edited operating temperature ranges, updated approval information, r eformatted 2732b - corrected transmission speed led indications (section 5.5) and clarified fl switch sfn?gt? capability. lnk/act 100 x5 x1 x2 x3 x4 fl switch sfn 5tx ord.-no.: 2891152 100 ln k / ac t 100 ln k / ac t 100 ln k / ac t 100 ln k/ ac t lnk/act 100 x5 x1 x2 x3 x4 fl switch sfn 4tx/fx st ord.-no.: 2891453 100 ln k / ac t 100 ln k / ac t 100 ln k / ac t 100 ln k / ac t lnk/act x5 fl switch sfn 5tx fl switch sfn 5tx with fl sec pac fl switch sfn 4tx/fx st 72671000
fl switch sfn? 2732_en_d phoenix contact 7 5.2 8-port versions the housings of the 8-port ve rsions are identical. on the fiber optic versions, the connections for the fiber optic ports are at the front. the physical location of the ports on the fl switch sfn?tx? and fl switch sfn?gt? (gigabit) switches are the same. figure 2 housing examples for 8-port switches 5.3 diagnostic and status indicators 5.4 data transmission speed leds (10/100 mbps switches) 5.5 data transmission speed leds (10/100/1000 mbps switches) fl s witch s fn 8 gt fl s witch s fn 6tx/2fx x1 x 3 x5 x7 fl s witch s fn 8 gt ord.no.2 8 9167 3 1 0 0 / act u s 2 x2 x4 x6 x 8 x1 x 3 x5 x7 fl s witch s fn 8 tx ord.no.2 8 91929 10 0 l n k / ac t 10 0 l n k / ac t 1 0 0 l n k / ac t 10 0 l nk/ act u s x2 x4 x6 x 8 1 0 0 lnk / act 10 0 ln k / ac t 1 0 0 l n k / act 10 0 l n k / act x1 x 3 x5 x7 fl s witch s fn 6tx/2fx ord.no.2 8 91 3 14 1 0 0 l n k / act 10 0 ln k / act 100 l nk/ act 100 l nk/ act u s x2 x4 x6 x 8 1 0 0 l n k / ac t 1 0 0 l n k / act 1 0 0 l n k / ac t x1 x 3 x5 x7 fl s witch s fn 7tx/fx ord.no.2 8 91097 1 0 0 ln k / ac t 1 00 lnk/ ac t 1 0 0 lnk / ac t u s x2 x4 x6 x 8 1 0 0 l n k/ act 10 0 l n k / ac t 1 0 0 l nk/ act 100 lnk / act 1 0 0 l n k / ac t 1 0 0 l n k / ac t fl s witch s fn 6tx/2fx s t x1 x 3 x5 x7 fl s witch s fn 6tx/2fx ord.no.2 8 91 3 14 1 0 0 l n k / act 100 ln k / act 100 l nk/ act 100 l nk/ act u s x2 x4 x6 x 8 1 0 0 l n k / ac t 1 0 0 l n k / act 1 0 0 l n k / ac t x1 x 3 x5 x7 fl s witch s fn 7tx/fx ord.no.2 8 91097 1 0 0 lnk / ac t 1 00 lnk/ ac t 1 0 0 lnk / ac t u s x2 x4 x6 x 8 1 0 0 l n k/ act 10 0 ln k / act 1 0 0 l nk/ act 100 lnk / act 1 0 0 l n k / ac t 1 0 0 l n k / ac t u s 1 link 10 act 10 1000 / act 1 0 0 / ac t 1 0 0 0 / ac t 1 0 0 / ac t 1 0 0 0 / ac t 1 0 0 / ac t 1 0 0 0 / ac t 1 0 0 / act 10 0 0/ ac t 1 0 0/ ac t 1 0 0 0 / act 10 0 / act 1 000 / act 10 0 / ac t 10 0 0 / ac t rd td rd td td rd des. color status meaning us1 and us2 green on supply voltage (u s ) in the tolerance range off supply voltage (u s ) too low 10 mbps 100 mbps lnk/act on/blinking on/blinking 100 off on lnk/act led: on: indicates an electrical link flashing: indicates network traffic (at high data rates the blinking is in a constant rate) 10 mbps 100 mbps 1000 mbps 100/act on/blinking on/blinking off 1000/act on/blinki ng off on/blinking one led/port on or blinking: on: indicates an electrical link flashing: indicates network traffic at the data rate (x mbps) both leds/port on or blinking: both on: indicates a 10 mbps electrical link both flashing: indicates network traffic at 10 mbps)
fl switch sfn? 2732_en_d phoenix contact 8 6 installation install the fl switch sfn? on a clean din rail. to avoid contact resistance use only cl ean, corrosion-free rails that meet the en 50022 standard . end clamps should be mounted on both sides of the module to stop the modules from slipping on the rail. 6.1 assembly 1. place the module onto th e din rail from above. the upper holding keyway must be hooked onto the top edge of the din rail. 2. push the module from the front towards the mounting surface. 3. once the module has been snapped on properly, check that it is fixed se curely on the rail. 6.2 removal 1. insert a suitable tool (e.g., needle-nose pliers) into the arresting latch and pull it down. 2. pull the module slightly away from the mounting surface. 3. lift the module from the rail. 6.3 power connection the switch is designed for selv and pelv operation at +24 v dc according to iec 61140/en 61140. only selv and pelv according to the defined standards may be used for supply purposes. snapping the switch onto a grou nded din rail connects it to the ground potential. in an en vironment particularly prone to emi, noise immunity can be in creased by an additional low- impedance connection to functional earth ground. figure 3 fl switch sfn?tx? power connection caution: only qualified personnel may start up and operate this device. qualified personnel are persons authorized to start up, ground and mark devices, systems, and equipment according to the standards of safety technology. note: the fl switch sfn? module is designed for selv and pelv operation according to iec 61140/en 61140. warning: a.)this equipment is suitable for use in class i, zone 2, groups a, b, c, and d or non- hazardous locations only. b.) warning - explosion hazard - substitution of components may impair suitability for class i, zone 2. c.) warning - explosion hazard - do not disconnect equipment unless power has been switched off or the area is known to be non-hazardous. note: connect the din rail to pr otective earth ground using a grounding terminal block. the modules are grounded when they are snapped onto the rail. connect protective earth ground with low impedance. 1000 mbps switches have a protective ground connecting screw on top. gnd us ? +
fl switch sfn? 2732_en_d phoenix contact 9 figure 4 fl switch sfn?gt? power connections for single power supply figure 5 fl switch sfn?gt? power connections for redundant power supply use power conductors between 0.2 - 2.5 mm2 (24 - 12 awg). torque connecti on screws to 0.5 - 0.6 nm (5 - 7 lb-in.). 6.4 alarm contact the fl switch sfn? switch provides contacts (r1, r2) for remote alarms if a failure is detected. ? the contact closes if one or both power supplies fail. ? the contact opens if power is ok. the maximum current, including inrush, is 100 a. 6.5 ethernet interface the fl switch sfn? has five et hernet ports on the front in rj45 format to which only twisted-pair cables with an impedance of 100 can be connected. the data transmission speed is 10/100 m bps. in addition, every port has an auto crossing function: it is not necessary to make a distinction between 1:1 or crossover ethernet cables. figure 6 rj45 pin assignment 6.6 fiber optic connection two different types of fiber op tic connection are available. the fiber optic connector(s) ar e located on the lower front face of the 8-port models or on the bottom face of the 5-port models. the st connectors are typically individual round connectors and use a 1/4-turn connection. gnd us1 us2 r1 gnd r2 ? + gnd us1 us2 r1 gnd r2 ? + ? + rj45 8765 4321 n.c. n.c. td- n.c. n.c. td+ rd- rd+ 10/100 mbps rj45 8765 4321 dd- dd+ db- dc- dc+ db+ da- da+ 10/100/1000 mbps
fl switch sfn? 2732_en_d phoenix contact 10 the sc connectors have a square interface and the ?conductors? are typically locked together through the connector. figure 7 5-port fiber optic ports figure 8 8-port st fiber optic ports figure 9 8-port sc fiber optic ports 6.7 using the fl sec pa c kit for port security layer 1 port security for up to 4 ports is provided by purchasing the fl sec pac kit. the kit contains four red security frames, four gray po rt blocking security caps, unlocking key and instructions. the red security frame must first be attached to each port that is to be secured. 1. first orient the red security frame so that the cable locking tabs of both the frame and the switch are aligned. 2. insert the four mounting feet of the security frame into the pre-punched holes around the switch port and push until the frame snaps into pl ace with an audible click. 3. inserted cables or gray port blocking security caps are now locked into place. instructions for using the key to unlock the cables or security caps are included in the kit. 7 switching characteristics ? store and forward all data telegrams received by the switch are saved and their validity checked. invalid or faulty data packets (> 1522 bytes or crc errors) and fragments (< 64 bytes) are rejected. valid data telegrams are forwarded by the switch. the switch always forwards the data using the data transm ission speed that is used in the destination network segment. ? multi-address function the switch independently learns the addresses for termination devices, which are connected via a port, by evaluating the source addre sses in the data telegrams. only packets with unknown addresses, with a source address of this port or with a multicast/broadcast address in the destination address field are forwarded via the corresponding port. the switch can store addresses in its address table with an aging time of 5 minutes. this is important when more than one termination device is connected to one or more ports. in this way, several independent subnetworks can be connected to one switch. ? quality of service (qos): ieee 802.1p/q the fl switch sfn? swit ches are capable of reading ethernet packets that have already been assigned a priority level by a managed switch. in cases of heavy traffic, packets with a priority level between 4 st connectors sc connectors td rd td rd din rail clamp ? s fn 6tx/2fx s t x5 x7 1 0 0 ln k / ac t 10 0 ac t x6 x 8 1 0 0 ac t ? s fn 7tx/fx s t x5 x7 1 0 0 ac t x6 x 8 100 l n k/ act 1 00 ac t 1 00 ln k / ac t 1 0 0 l n k / ac t rd td rd td td rd td rd rd td rd td ? s fn 6tx/2fx-lx ? s fn 6tx/2fx ? s fn 6tx/2fx-lx-20 x5 x7 1 0 0 ln k / ac t 10 0 x6 x 8 1 0 0 1 00 ln k/ ac t ? s fn 7tx/fx x5 x7 1 0 0 x6 x 8 10 0 l n k / act 1 00 1 0 0 l nk/ ac t rd td rd td td rd once attached, the se curity frames are permanently mounted and cannot be removed. a restart deletes the entire address table.
fl switch sfn? 2732_en_d phoenix contact 11 and 7 are considered high priority and processed before packets with a priority level between 0 and 3. after prioritization the packets are forwarded without modification. 8dimensions figure 10 housing dimensions 9 fl switch sfn?gt? jumbo frame support certain revisions of the fl switch sfn?gt? switches have the ability to support ju mbo frames. table 1 shows the minimum version code (v/c) an d hardware code (h/c) that provides jumbo frame support: a jumbo frame is an ethernet packet (or frame) which has a size greater than the ieee standard 1518 bytes. jumbo frames are technically defined as 9000 bytes or less, but commercial use of the term has been applied to packet sizes over 9000 bytes. jumbo frames are used to reduce network loading when transferri ng large data files. fewer but larger packets, containing fewer overall overhead bytes, increase the overall network efficiency. 9.1 fl switch sfn?gt? jumbo frame capability fl switch sfn?gt? switches support jumbo frames up to 9600 bytes per frame. in addition, the jumbo frames can be used with both 100 mbps and 1000 mbps communication. an fl swit ch sfn?gt? switch has an ethernet packet (fra me) buffer memory capacity of 16 kb per port. this memory capacity is especially important when data is fed through cascaded switches that make up a network backbone. 9.2 jumbo frame performance factors the switch?s frame buffer si ze, the size of the frames (bytes/frame) and overall traf fic loading of the network (bandwidth) impact the overall application performance. in the following sections, the loading per port is compared with the maximum frame size. at packet (frame) sizes over 3000 bytes, the switch will start sending pause frames to control the traffic flow (see vertical line on figure 11 and figure 12). as the size of th e frame increases, the sending of pause frames increases. figure 11 and figure 12 indicate the maximum loading per port that can occur (for each jumbo frame size) until th e buffer is overloaded and packets start to be dropped. 9.3 application guidelines the use of jumbo frames in indu strial applications typically falls into two major application classes: ? bidirectional data transfers: usually caused by larger data file exchanges between controllers or pc applications. these may use jumbo frames in both directions (read/write) betw een the industrial devices. ? unidirectional data transfer : typically found in networks where security cameras or vi sion inspection equipment feed back to a centralized mo nitoring station. in these cases, the vast majority of the traffic flows in one table 1 jumbo frame support firmware type code version code hardware code fl switch sfn 8gt 02 12 fl switch sfn 7gt/sx 03 13 fl switch sfn 6gt/2sx 02 12 fl switch sfn 6gt/2lx 02 12 fl switch sfn 6gt/2lx-20 01 11 x1 x2 x 3 x4 fl s witch s fn 5tx ord.-no.: 2 8 91152 100 lnk/ act 100 lnk/ ac t 100 lnk/ act 100 lnk/ act lnk/act 100 x5 x1 x 3 x5 x7 fl s witch s fn 8 tx ord.-no.: 2 8 91929 100 lnk/ act 100 ln k/ ac t 100 lnk/ act 100 lnk/ act u s x2 x4 x6 x 8 100 lnk/ ac t 100 lnk/ act 100 lnk/ act 100 lnk/ ac t 14 mm 120 mm 3 0 mm 50 mm version codes are displayed on the package label and hardware codes are displayed on the product label. figure 11, figure 12, and figure 13 display traffic loading for 1000 mbps (gig abit) data rates. for 100 mbps data rates divide the y axis numbers by 10.
fl switch sfn? 2732_en_d phoenix contact 12 direction, i.e., security images from a camera to the network, with only a few, normal size transmissions containing control commands going the opposite direction. bidirectional data transfer guidelines when using jumbo frames for bidirectional data transfers, the generation of pause frames starts at 3000-byte size frames. traffic loadings of near 100% are possible with frame sizes up to 7000 bytes. above 7000 bytes the percent traffic loading has to be reduced to prevent dropped packets. figure 11 maximum bidirectional traffic loading per port (fl switch sfn 8gt) unidirectional data transfer guidelines in applications where the data flow is predominantly in one direction, such as cameras and vision systems, near 100% loading is possible using jumbo frames. figure 12 maximum unidirectional traffic loading per port (fl switch sfn 8gt) when cascading devices in a trunk topology, up to 18 mbps of the available bandwidth is required to support overhead and pause frame traffic for each link betw een cascaded switches. figure 13 overhead/cascaded switch vs. frame size 9.4 calculating total network loading with cascaded (trunk topology) switches because of the buffer size co nsiderations when using jumbo frames, network bandwidth load ing should be planned in advance to prevent packet loss. 1. determine the total application traffic load for the connected devices. add all the traffic loads from each device that will be connected to the switch an d transferred to the main trunk line. when using cameras or vision systems, the bandwidth usage per device can be high (see table 2). actual numbers may vary depending on the camera or device type used. 2. add all the application tr affic from all connected switches and compare to the maximum network capacity. as the trunk traffic passes from switch to switch, add the total application device traffi c from all the switches. the traffic load on the trunk ports cannot be greater than the total bandwidth available (1000 mbps for gigabit and 100 mbps for fast ethernet ports). 3. determine the traffic load for bandwidth consumed by application overhead and pause frames (see figure 13). after the first switch, add this amount for each additional switch segment. 0 200 400 600 8 00 1000 2000 3 000 4000 5000 6000 7000 8 000 9000 9600 maximum loading pause frame threshold frame size (bytes) traffic loading (mbps) 0 100 200 3 00 400 500 600 700 8 00 900 1000 2000 3 000 4000 5000 6000 7000 8 000 9000 9600 maximum loading pause frame threshold frame size (bytes) traffic loading (mbps) table 2 typical bandwidth load typical camera settings color depth (bits/pixel) typical traffic load (mbps) 60 frames per second 750 x 640 pixels per frame 8182 12 275 16 366 24 550 32 732 0 20 40 60 8 0 100 120 140 160 1 8 0 200 2000 3 000 4000 5000 6000 7000 8 000 9000 frame size (bytes) overhead (mbps)
fl switch sfn? 2732_en_d 13 phoenix contact gmbh & co. kg ? 32823 blom berg ? germany ? phone: +49-(0) 5235-3-00 phoenix contact ? p.o.box 4100 ? harrisburg ? pa 17111-0100 ? usa ? phone: +717-944-1300 www.phoenixcontact.com as an example, if a total of four switches are connected together, there will be a first switch then three additional switched segments. this me ans that three times the overhead value must be used. 4. add all the application traffi c (step 2.) with all the over head values (step 3.) and compare with the total available bandwidth. example 1 assuming gigabit devices ar e used with 9000-byte jumbo frames and a total of three ca scaded switches. each switch has one 8 bit/pixel camera plus 10 mbps of miscellaneous traffic from other ports. figure 14 depicts an exam ple with three cameras connected to individual switches. each camera is configured for an 8 bits per pixel color depth, creating a load of 182 mbps per camera (see table 2) with a total traffic load of 546 mbps . frame size is configured to 9000 bytes creating an overhead of 180 mbps (see figure 13) for each cascading switch for a total of 360 mbps . figure 14 9000-byte frame size example adding the camera data and overhead together indicates a total traffic load of 906 mbps , leaving 94 mbps of the 1000 mbps total unused. example 2 to take advantage of the band width not used in example 1, assume one of the cameras is now required to operate at 12 bits per pixel . the increased camera color depth increases the traffic load to a total of 639 mbps . combined with the 360 mbps overhead with a 9000-byte frame size, the total bandwidth is 999 mbps . while technically with in the capability of a 1000 mb switch, any additional traffic across the transmission line could result in frame loss. figure 15 8000-byte frame size example one possible solution is to change the frame size to 8000 bytes, reducing the overhead (see figure 15). the reduced frame size results in a total overhead of 320 mbps . combined with the camera traffic load, the resulting bandwidth requirement is 959 mbps , allowing some space for additional traffic. in p u t + _ aut o hp lp 2065 x1 x 3 x5 x7 fl s witch s fn 8 tx ord.-no.: 2 8 91929 100 lnk/ act 100 ln k/ ac t 100 lnk/ ac t 100 lnk/ act u s x2 x4 x6 x 8 100 lnk/ ac t 100 lnk/ ac t 100 lnk/ act 100 lnk/ ac t x1 x 3 x5 x7 fl s witch s fn 8 tx ord.-no.: 2 8 91929 100 lnk/ act 100 lnk/ ac t 100 lnk/ ac t 100 lnk/ ac t u s x2 x4 x6 x 8 100 lnk/ ac t 100 lnk/ act 100 lnk/ ac t 100 lnk/ ac t x1 x 3 x5 x7 fl s witch s fn 8 tx ord.-no.: 2 8 91929 100 lnk/ act 100 ln k/ ac t 100 lnk/ act 100 lnk/ act u s x2 x4 x6 x 8 100 lnk/ ac t 100 lnk/ act 100 lnk/ ac t 100 lnk/ ac t 1234 t110 poweredge poweredge 182 mbps 182 mbps 182 mbps 180 mbps 180 mbps in p u t + _ aut o hp lp 2065 x1 x 3 x5 x7 fl s witch s fn 8 tx ord.-no.: 2 8 91929 100 lnk/ act 100 ln k/ ac t 100 lnk/ ac t 100 lnk/ act u s x2 x4 x6 x 8 100 lnk/ ac t 100 lnk/ ac t 100 lnk/ act 100 lnk/ ac t x1 x 3 x5 x7 fl s witch s fn 8 tx ord.-no.: 2 8 91929 100 lnk/ act 100 lnk/ ac t 100 lnk/ ac t 100 lnk/ ac t u s x2 x4 x6 x 8 100 lnk/ ac t 100 lnk/ act 100 lnk/ ac t 100 lnk/ ac t x1 x 3 x5 x7 fl s witch s fn 8 tx ord.-no.: 2 8 91929 100 lnk/ ac t 100 ln k/ ac t 100 lnk/ act 100 lnk/ act u s x2 x4 x6 x 8 100 lnk/ ac t 100 lnk/ act 100 lnk/ ac t 100 lnk/ ac t 1234 t110 poweredge poweredge 182 mbps 182 mbps 275 mbps 160 mbps 160 mbps

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