Home : Why INTERBUS? : Competitive Comparisons

BACKGROUND INFORMATION
  Technology
Developer		 Year
Introduced		 Governing
Standard		 Openness
INTERBUS Phoenix Contact 1984 EN50254 2000 Products from over 1000 manufacturers
PROFIBUS
DP/PA		 Siemans/PTO DP-1994,
PA-1995		 DIN 19245 part ¾ Products from over 1400 vendors
DeviceNet Allen-Bradley March 1994 ISO 11898 & 11519 6 chip vendors, 300+ products
ARCNET Datapoint/SMC 1975 ANSI 878 Chips, boards, ANSI docs
AS-I AS-I Consortium Fall 1993 Submitted to IEC AS-II.C. Market item
Fieldbus Foundation Fieldbus Foundation 1995 ISA SP50/IEC TC65 Chips/software from multiple vendors
IEC/ISA SP50 Fieldbus ISA & Fieldbus F. 1992-1996 IEC 1158/ANSI 850 Multiple chip vendors
Seriplex APC, Inc. 1990 Seriplex spec Chips available
multiple interfaces
WorldFIP WorldFIP 1988 IEC 1158-2 Multiple chip vendors
LonWorks Echelon Corp. March 1991 ASHRAE of BACnet Public documentation on protocol
SDS Honeywell Jan. 1994 Honeywell Specification, Submitted to IEC, ISO11989 6 chip vendors, 200+ products

PHYSICAL CHARACTERISTICS
  Network
Topology		 Physical
Media		 Max. Devices
(nodes)		 Max.
Distance
INTERBUS Open: Bus,Tree, Ring, Star, 16 level nesting Twisted-pair, fiber, slip-ring, Infrared 512 System Total
256 on remote bus		 12.8 Km (copper) total
400m max between devices
PROFIBUS DP/PA Line, star & ring Twisted-pair or fiber 127 nodes 24 Km (fiber)
DeviceNet Trunkline/dropline with branching Twisted-pair for signal & power 64 nodes 500m
ARCNET Bus, multidrop, star Twisted-pair coax fiber 255 nodes 5 miles
AS-I Bus, ring, tree star Two wire cable 31 slaves 100 meters, 300 with repeater
Fieldbus Foundation Multidrop with bus powered devices Twisted-pair 240/segment, 65,000 segments 1900m @ 31.25K 500m @ 2.5M
IEC/ISA SP50 Fieldbus Star or bus Twisted-pair fiber, and radio IS 3-7
Non IS 128		 1700m @ 31.25K
500M @ 5Mbps
Seriplex Tree, loop, ring, multi-drop, star 4-wire shielded cable 500+ devices 500+ ft.
WorldFIP Bus Twisted-pair, fiber 256 nodes up to 40 Km
LonWorks Bus, ring, loop, star Twisted-pair, fiber, power line 32,000/domain 2000m @ 78 kbps
SDS Trunkline/Dropline Twisted-pair for signal & power 64 nodes, 126 addresses 500m

TRANSPORT MECHANISM
  Communication
Method		 Transmission
Properties		 Data
Transfer
Size		 Arbitration
Method		 Error
Checking		 Diagnostics
INTERBUS Master/slave with total frame transfer

Transparent data linking via master

 500kBits/s, full duplex Up to:
  • 64bytes real time data /device,
  • 244 Bytes PCP data/device
  • 512 In + 512 Out bytes per system
    		•  None 16-bit CRC between each device Wire location of CRC error and cable break
    Module & I/O channel diagnostics
    PROFIBUS DP/PA Master/slave
    peer to peer    		 DP up to 12 Mbps
    PA 31.25 kbps    		 244 bytes Token passing HD4 CRC Station, module & channel diagnostics
    DeviceNet Master/slave, multi-master, others 500 kbps, 250 kbps, 125 kbps 8-byte variable message Carrier-Sonac Multiple Access CRC check Bus monitoring
    ARCNET Peer to peer 31.25K to 10M 508 bytes Token 16-bit CRC Built in
    AS-I Master/slave with cyclic polling Data and power, EMI resistant 31 slaves with 4 in and 4 out Master/slave with cyclic polling Manchester Code, hamming-2, partly Slave fault
    device fault
    Fieldbus Foundation Client/server publisher/subscriber, Event notification 31.25 kbps 1 Mbps
    2.5Mbps    		 16.6 M objects/device Deterministic centralized scheduler, multiple backup 16-bit CRC Remote diagnostics, network monitors, parameter status
    IEC/ISA SP50 Fieldbus Client/server Publisher/ subscriber 31.25 kbps IS+1, 2.6, 5 Mbps 64 octets high & 256 low priority Scheduler, tokens, or master 16-bit CRC Configurable on network management
    Seriplex Master/slave peer to peer 200 Mbps 7680/transfer Sonal multiplexing End of frame & echo check Cabling problems
    WorldFIP Peer to peer 31.25 kbps, 1 & 2.5 Mbps, 6 Mbps fiber No limit, variables 128 bytes Central arbitration 16-bit CRC, data "freshness" indicator Device message time-out, redundant cabling
    LonWorks Master/slave
    peer to peer    		 1.25 Mbs full duplex 228 bytes Carrier Sense, Multiple Access 16-bit CRC Database of CRC errors and device errors
    SDS Master/slave, peer to peer, multi-cast, multi-master 1Mbps,
    500 kbps,
    250 kbps,
    125 kbps    		 8-byte variable message Carrier-Sonac Multiple Access CRC check Bus monitoring, Diagnostic slave



    ©1999INTERBUS Club Email: info@ibsclub.com