07.311.6655.0 WIELAND ELECTRIC, 07.311.6655.0 Datasheet - Page 406

• Manufacturer Part Number: 07.311.6655.0
• Description: END PLATE, WK/WKN FEED-THROUGH BLOCK
• Manufacturer: WIELAND ELECTRIC
• Series: APNr

Specifications of 07.311.6655.0

• Accessory Type: End Plate
• For Use With: WK/WKN Series Feed-through Blocks
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ricos
404
Technical information
on bus systems
ricos
PROCESS FIELD BUS
PROFIBUS DP (distributed I/Os), defined
in DIN 19 245, part 3, and integrated in
the European field bus standard EN 20
170, is a PROFIBUS variant with an
optimized transmission rate to serve the
needs of the object-oriented system
sector and the sensor-actuator sector. It is
designed to fit the requirements of the
fast, efficient data exchange between the
automation devices and the distributed
devices such as binary or analog
input/output modules and drives in
timesensitive applications,
while the layer 7 service is not used.
This shift of PROFIBUS DP into the field
level enables cost savings in cabling. The
field bus PROFIBUS DP is not new, but
uses well-proven characteristics of the
PROFIBUS transmission technology and
the bus access protocol (DIN 19245, part
1 and 2). It is reduced vy certain functions
in order to meet the high requirements of
the system responsetime in the field of
distributed I/O devices.
It is also possible to operate PROFIBUS
FMS and PROFIBUS DP in one single
cable. And there are especially interesting
options when using so-called combination
devices which use the characteristics of
both variants.
The remarkable features of
PROFIBUS DP are:
Data transfer via distributed devices
(slaves) is mainly done cyclically in the
master-slave procedure. The central
control system (master) reads the input
information of the slaves and writes the
output data to the slaves. PROFIBUS DP
V1 also supports, among others the
acyclic data interchange PROFIBUS DP
operates with a transmission rate of up to
12 Mbits/s and enables the transmission
of 1024 bit input/output data distributed
among 32 nodes in less than 2 ms.
Characteristics:
Short response times
High immunity
Replaces the cost-intensive measured
value transmission by a 0(4) to 20mA
technology
Line structure (with passive bus
coupling)
Max. length of 9.6 km in an electrical
installation; up to 90 km in an optical
one
Area-covering networking by
subdividing the system in 5 bus
segments
(via repeater) of up to 1.5 Mbit/s
Number of the repeaters used and
therefore the transmission distance
depending on the baud rate
Max. 124 nodes (throughout all bus
segments), max. 32 nodes per segment
Bus access in the token passing
procedure; normal operation only with a
master and polling request
High transmission rate (real-time
capability of PLCs is the major
motive for DP)
Data transmission via two-wire cable or
optical fibre (active bus coupling)
Electrical installation with screened,
twisted-pair cable and RS485 interface
Bit coding in NRZ code
(non return to zero)
I/O and field devices can be coupled and
uncoupled during operation
Extensive disgnostic options
Open system (DIN E 19 245; EN 50
170)