TP854 3BSE025349R1 ABB Analog output module ci854 base

TP854 3BSE025349R1 ABB Analog output module ci854 base

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The permissible twisted-pair cables are specified in IEEE 802.3i-1990. At 2.5

MBit/s and with coaxial cables, for example, the maximum length of a bus segment is 300 m with eight subscribers and without a hub. With twisted-pair cables,

under the same conditions, a maximum length of approximately 120 m can be

achieved. The maximum transmis -sion length depends on the number of connected subscribers. With coaxial cables, a maximum of 16 km can be achieved;

with twisted-pair cables approximately 6 km, in each case at 2.5 MBit/s. The

fiber-optic link provides the highest degree of interference immunity. With glass

fiber-optics, distances of up to 3 km are possible at 2.5 MBit/s; with plastic fiberoptic cables only small distances of up to approximately 100 m. The baud rate

plays no significant role in fiber-optic cable transmission. Here, the range can as

well be extended using hubs.

Diagnostics

Detailed diagnostic messages for rapid trouble-shooting are shown on the CPU

display.

ARCNET – the functionality at a glance

• Guaranteed collision-free data transmission, guaranteed response times and

real-time capability thanks to token-passing

• Large network dimensions: network length 300 m, with amplifier max. 16 km

• Secure, thanks to checksums in the data packet and hand shake protocol

 between transmitter and receiver

• Variable network structure: bus, tree and star topologies are possible, plus any

 desired mixtures of them

• Variable networking media, coaxial cables, twisted-pair cables and fiber-optic

 cables can be mixed

• Automatic subscriber log-on and log-off; the network automatically incorporates new stations in the ring and cancels them as well

• Master-master access: the subscriber that holds the token is the master. With

up to 255 masters at the same network

• Data transmission rate of max. 2.5 MBit/s

• ARCNET is configured and programmed using the AC500 Control Builder

 engineering tool