Catalogue supplement XI/ON – The modular I/O ... - Moeller Electric
Catalogue supplement XI/ON – The modular I/O ... - Moeller Electric
Catalogue supplement XI/ON – The modular I/O ... - Moeller Electric
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<strong>XI</strong>/<strong>ON</strong> and fieldbus protocols<br />
8<br />
<strong>XI</strong>/<strong>ON</strong> and PROFIBUS-DP<br />
Decentralized periphery<br />
Optimized for high speed, this PROFIBUS version<br />
is designed especially for communication<br />
between automation control systems and<br />
decentralized periphery devices. PROFIBUS-DP<br />
can be used to replace cost-intensive, parallel<br />
signal transmission from digital and analogue<br />
sensors and actuators. PROFIBUS-DP is based on<br />
DIN 19 245 Part 1 and Part 4. During the course<br />
of the European fieldbus standardization,<br />
PROFIBUS-DP has been included in the European<br />
fieldbus standard EN 50170.<br />
Maximum system extension without<br />
repeaters<br />
A PROFIBUS-DP bus line consists of at least a<br />
master and a slave. Without a repeater, a<br />
PROFIBUS-DP bus line can consist of up to 31<br />
slaves.<br />
<strong>The</strong> maximum number of 32 bus stations must<br />
not be exceeded without the use of a repeater!<br />
Maximum system extension with<br />
repeaters<br />
A maximum of 3 repeaters can be used within<br />
a PROFIBUS-DP structure. This increases the<br />
number of possible slaves to 122.<br />
<strong>The</strong> maximum number of 125 bus stations,<br />
including all slaves and repeaters, must not be<br />
exceeded!<br />
<strong>The</strong> PROFIBUS-DP addresses 000, 126 and 127<br />
are reserved and must not be used for <strong>XI</strong>/<strong>ON</strong>!<br />
Maximum bus length<br />
Baud rate<br />
(kBit/s)<br />
9.6<br />
187.5<br />
500<br />
1500<br />
3000<br />
12000<br />
max. length of a bus line<br />
without repeater (m)<br />
1200<br />
1000<br />
400<br />
200<br />
100<br />
100<br />
Topology<br />
Max. distance between two stations / cable type A<br />
(DIN 19 245 Part 3)<br />
PROFIBUS-DP communicates via a shielded<br />
twisted pair cable according to the RS 485<br />
standard. <strong>The</strong> network topology represents a<br />
linear structure with active bus termination on<br />
both ends.<br />
max. bus length<br />
with 3 repeaters (m)<br />
4800<br />
4000<br />
1600<br />
800<br />
400<br />
400<br />
<strong>Moeller</strong> NK2725-1042 GB<br />
<strong>The</strong> maximum bus length for PROFIBUS-DP<br />
depends on the transmission rate: Cable type<br />
Parameter<br />
Characteristic impedance<br />
Distributed capacitance<br />
Loop resistance<br />
Wire diameter<br />
Wire cross-section<br />
Terminating resistor<br />
Cable type A<br />
DIN 19 245 Part 3<br />
135 to 165 Ω<br />
(3 to 20 MHz)<br />
< 30 nF/km<br />
< 110 Ω/km<br />
> 0.64 mm<br />
> 0.34 mm 2<br />
220 Ω
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