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Contemporary Control Systems EB/DNET-CXB Extend-A-Bus, Руководство пользователя

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Contemporary Control Systems EB/DNET-CXB Extend-A-Bus Скачать руководство пользователя страница 21

TD960801-0MC

17

Figure 2-10.  By using two AI3-CXS hubs, a distributed star

topology is achieved.  Note that the hub-to-hub distance can be

a maximum of 610 m when using coaxial cable and that no

terminators are used at the AI3 ports. However, the cables to

the EXTEND-A-BUSes still cannot exceed 305 m.

Содержание EB/DNET-CXB Extend-A-Bus

Страница 1: ...EXTEND A BUS for A Line of Fieldbus Extenders for DeviceNet User Manual TD960801 0MC...

Страница 2: ...by any means electronic mechanical magnetic optical chemical manual or otherwise without the prior written permission of Contemporary Control Systems Inc 2431 Curtiss Street Downers Grove Illinois 60...

Страница 3: ...BUS 6 2 4 Powering the EXTEND A BUS 6 2 5 Connecting to the CAN Port 9 2 6 Connecting to the Backbone Port 12 Chapter 3 Operation 19 3 1 CAN Communications 19 3 2 Theory of Operation 20 3 3 System Co...

Страница 4: ...11 Figure 2 7 Appropriate terminators are required at the ends of both the coaxial cable backbone and DeviceNet subnets 13 Figure 2 8 A maximum of eight EXTEND A BUSes can occupy one coaxial backbone...

Страница 5: ...interconnecting medium Thus a pair is required to interconnect two networks or subnets the way two modems are used on leased phone lines Utilizing ARCNET as the high speed deterministic interconnectin...

Страница 6: ...e achieved requiring two active hubs Hubs are cascaded to reach the required distance 1 2 Features Extends the length of DeviceNet networks up to 6 km Fully DeviceNet compliant Fiber optic or coaxial...

Страница 7: ...5 kbps 250 kbps 500 kbps select able or Autobaud 125 kbps 250 kbps 500 kbps LEDs CAN status Module status network status Transceivers Optically isolated 82C251 Cable DeviceNet Thick Connectors 5 posit...

Страница 8: ...dget 10 4dB Maximum number CXB model 8 of nodes per segment FOG model N A Terminating resistor CXB model 93 ohms FOG model N A 1 5 Ordering Information The EXTEND A BUS series is available in several...

Страница 9: ...been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interferenc...

Страница 10: ...intervention At no time did the EXTEND A BUS fail to return to normal operation or become unsafe during the execution of these tests A copy of the Declaration of Conformity is in the appendix 2 3 Moun...

Страница 11: ...A BUS maximizes at 4 watts therefore at 10 VDC the input current is approximately 400 ma The ground connection to the EXTEND A BUS is connected to chassis within the EXTEND A BUS The input connection...

Страница 12: ...is connected to the AC mains The secondary voltage must be in the range of 8 to 24 VAC 47 63 Hz with the capability of delivering up to 4 VA of apparent power The secondary of the transformer must no...

Страница 13: ...e 2 4 AC Powered with Battery Backup 2 5 Connecting to the CAN Port The CAN port complies to the DeviceNet physical layer specification for an isolated port Since the port is isolated bus power V V mu...

Страница 14: ...Male Contacts Figure 2 5 CAN Port Connector Assignments 2 5 2 CAN Port Data Rates Several data rates can be selected by a rotary switch as shown in figure 2 6 Switch positions are labeled A S 125 250...

Страница 15: ...a rate by observing the traffic on the CAN port Therefore it is important that the CAN port be connected to the DeviceNet subnet connecting the master controller All other EXTEND A BUSes should have t...

Страница 16: ...ion If star or distributed star topologies are desired or if the cabling distances must exceed the basic specifications ARCNET compliant active hubs are required Contemporary Controls provides two ser...

Страница 17: ...EXTEND A BUSes using BNC Tee connectors to the backbone wiring Make sure that any two EXTEND A BUSes are separated by at least 6 foot 2 m of cable and that the complete cabling segment does not excee...

Страница 18: ...a duplex cable arrangement Two unidirectional cable paths provide the duplex link There are two devices on the EXTEND A BUS fiber port One device colored light gray is the transmitter and the other da...

Страница 19: ...30 meters for connecting cable between hubs and EXTEND A BUSes in the field using the manufacturers labeling as a guide However remember that to connect point A to point B requires a paired fiber opti...

Страница 20: ...an EXTEND A BUS communicates to another EXTEND A BUS with each located at the extreme ends of a network cannot exceed 31 s This delay is due to cable and hub delays This delay translates to a maximum...

Страница 21: ...hubs a distributed star topology is achieved Note that the hub to hub distance can be a maximum of 610 m when using coaxial cable and that no terminators are used at the AI3 ports However the cables...

Страница 22: ...TD960801 0MC 18...

Страница 23: ...ation As stations apply their unique identifier to the network they observe if their data is being faithfully produced If it is not the station assumes that a higher priority message is being sent and...

Страница 24: ...r bridges can mean different things to different people so further clarification is necessary A local bridge stands by itself connecting adjacent wiring segments together as in the case of a repeater...

Страница 25: ...the CAN segment attaches to this port In a similar method additional CAN segments are attached to other EXTEND A BUS CAN ports The only restriction is that all CAN compliant devices on the complete n...

Страница 26: ...1000 feet and eight long CAN drop segments of 330 feet each If a true star topology or longer distances are desired each EXTEND A BUS can be connected to a companion AI series active hub For distribu...

Страница 27: ...e of storing and forwarding messages the EXTEND A BUS system introduces additional signal latency which may disturb DeviceNet systems with tight timing constraints With the DeviceNet protocol there ha...

Страница 28: ...wledges the single node s message Without remote bridges a single node will fail to hear an acknowledgment and will continuously retry The DeviceNet protocol supports autobauding which is possible for...

Страница 29: ...ng a hub thereby reducing data latency to that of two EXTEND A BUSes Implementing fiber optics over any reasonable distance with CAN is difficult due to the increased delays caused by the additional c...

Страница 30: ...YELLOW Continuous network configuration occurring or no other EXTEND A BUS nodes found Flashing YELLOW One or more network reconfigurations detected on an operating network GREEN Data is being receiv...

Страница 31: ...products only as delivered User modification may void the warranty if the product is damaged during installation of the modifications in which case this warranty does not cover repair or replacement...

Страница 32: ...4 7641 3923 U K or contact us via e mail at info ccontrols com or info ccontrols co uk You can visit our web site at www ccontrols com When contacting us please leave a detailed description of the pro...

Страница 33: ...schedule service for a product please call CC Customer Service support directly at 1 630 963 7070 U S or 44 0 24 7641 3786 U K Have the product model and serial number available along with a descript...

Страница 34: ...to the location from which it was purchased Contemporary Control Systems Inc 2431 Curtiss Street Downers Grove IL 60515 U S A Contemporary Controls Ltd Sovereign Court Two University of Warwick Scienc...

Страница 35: ...y that no node exists on that segment The permissible cable length of a segment depends upon the transceiver used and the type of cable installed Table A 1 provides guidance on determining the constra...

Страница 36: ...NC CXB coaxial bus RG 62 u BNC FOG duplex fiber optic 50 125 ST FOG duplex fiber optic 62 5 125 ST FOG duplex fiber optic 100 140 ST 1 This represents the minimum distance between any two nodes or bet...

Страница 37: ...Length Max Nodes Min Max Bus Segment Notes 0 2000 ft 610 m N A 5 5 dB 1000 ft max 6 ft 2 m1 1000 ft 305 m 8 5 5 dB 1000 ft max 0 3000 ft 915 m N A 4 3 dB km max 0 6000 ft 1825 m N A 4 3 dB km max 02 9...

Страница 38: ...22 1993 Class A Limits and Methods of Measurement of Radio Disturbance Characteristics of Information Technology Equipment EN 50082 2 1995 Electromagnetic Compatibility Generic Immunity Standard Part...

Страница 39: ...work extender Technical File TD960801 0FA I the undersigned hereby declare that the product s specified above conforms to the listed directives and standards George M Thomas President April 6 1999 Mod...

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