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IXXAT

CAN Repeaters - CAN-Interfaces and gateways

CAN Repeaters

CAN repeaters enable the physical coupling of CAN and

DeviceNet network segments. They can be used to easily

change the topology of DeviceNet systems to set-up tree

or star networks. The integrated galvanic isolaon provides

a built-in protecon against over voltage and the an-noise

circuit eliminates the eects of EMI.

Easy set-up of tree and star topologies for CAN and DeviceNet systems

When to use

CAN repeaters are used to improve

the system reliability, for the

galvanic protecon of system

segments or devices as well as for

reducing wiring costs.

Order information

On page 41

Highlights

Cost savings due to simple

wiring

Increased system reliability

Line protecon up to 4 kV

Almost no inuence on

real-me behavior

DIN-Rail backbone bus to

line up and connect

the devices easily

Fiber opc enables

transmission in areas with

high electromagnec

disturbances

OEM versions and design

in soluons available

Increased system reliability and protection

CAN and DeviceNet lines coupled with IXXAT repeaters are

independent electric segments that can be opmally terminated in

terms of signals. This substanally increases the system’s reliability .

The implemented monitoring funcon detects lines disturbed

by permanent dominant levels. These lines are disconnected

automacally, thus allowing the remaining network to connue

funconing normally. Aer the fault has been eliminated, the

disconnected segment is automacally reconnected to the network.

Depending on the type of repeater, the CAN lines are protected among

each other and against the power supply up to 4 kV. In addion, the

built-in CAN bus choke provides protecon against signal peaks.

System extension and

increased number of nodes

The freedom of using drop-lines and star topologies simplies the

wiring and allows system layouts which could not be realized

using the common line structure (Picture 1).

Furthermore, according to the transceiver output capacies, the

division of a CAN system into several subsystems, connected via CAN

repeaters, increases the maximum number of bus nodes.

Fast and transparent

Using repeaters does not inuence the

real-me behavior of a system because

in terms of transmission behavior, it

corresponds to a network that consists

only of lines.

Depending on Repeater version or

physical layer, typical signal delay is

between 150-300 ns, which is equal to a

30-60 m line length. Data transmission is

transparent, so it can be used with any

higher layer protocol (e.g,

DeviceNet, CANopen) or customer-

specic protocols.

10 m

50 m 50 m 50 m

10 m

50 m 50 m

50 m

40 m

Repeater

Convenonal bus structure

The distance between the two nodes

furthest apart (1 & 6) is 220 meters

Extended structure with drop line

The distance between the two nodes

furthest apart (1 & 4 or 4 & 6) is 150 meters

Picture 1

CAN INTERFACES AND GATEWAYS

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 30 31

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