Catalogue supplement XI/ON – The modular I/O ... - Moeller Electric

XI/ON and fieldbus protocols
12
XI/ON and DeviceNet
Bus system DeviceNet
The open, low-end network, DeviceNet, is based
on CAN technology.
The communication profile used by XI/ON
contains:
• UCMM
• Offline Connection Set
• Polled I/O
• COS/Cyclic
• Bitstrobe
• Device Heartbeat Message
• Device Shut Sown Message
The user can select a master/slave, multi master
or a combined configuration, depending on
application requirements.
Maximum bus length
The DeviceNet specifications permit the use of
two types of cable: thick and thin.
Depending on the type of cable used, the
following maximum bus lengths for the three
possible transfer rates are possible:
Baud rate
(kBit/s)
125
250
500
Maximum system extension
Max. distance between 2 stations
100 % thick Cable
500 m (1640 ft)
250 m (820 ft)
100 m (328 ft)
The branches can be up to 6 m (20 ft) long, but
the total extent of all branches depends on the
baud rate.
A DeviceNet bus line consists of a scanner and
at least another bus station.
The maximum number of 64 bus stations
(including the scanner) must not be exceeded.
Mixed operation with other devices
Within a DeviceNet structure, XI/ON can be
used in conjunction with standardized DeviceNet
fieldbus devices from various manufacturers.
Topology
DeviceNet uses a full trunk / branch line
topology with up to 64 nodes.
100 % thin Cable
100 m (328 ft)
Moeller NK2725-1042 GB