Engineering Notes; Network Design; Design Engineering Procedure - Siemens RXB Series Basic Documentation

Design engineering
flow chart
Project data
Devices, bus devices
Network
Special criteria
Large plants
Lightning and
overvoltage protection,
and EMC
For internal use only
Siemens
Building Technologies
2

Engineering notes

2.1

Network design

2.1.1

Design engineering procedure

For engineering see also the information in data sheet N3127.
Step Activity
1 Assess the situation.
2 Draft proposed solutions and
establish how to implement them.
3 Include plans for possible
expansion zones for extensions.
4 Determine device types and
quantity.
5 Define the installation of the
devices in accordance with
technical functions.
6 Define cable routing and cable
lengths.
7 Determine type of bus power
supply.
8 Check limits.
9 Create network structure and
wiring diagram.
When structuring a network, special attention should be paid to certain criteria:
The number of bus devices in a line, in an area and in the network.
The type of bus power supply in relation to the number and properties of the bus
devices.
The total length of all the bus cables in one line and in the network.
The distances between the bus devices.
The distance between the bus devices and the nearest bus power supply.
See the special notes in Section 8 on design engineering for "large plants".
Note special criteria in relation to lightning and overvoltage protection and EMC.
For details see the discussion in Section 9.7.
KNX bus communications
Engineering notes
Objective
Accurate plan of plant with
location of buildings and room
layout.
Overview of hydraulic system.
Clear project definition.
Advance planning of the scope to
expand the plant.
Table of device types.
Number of devices per line and
area, within the permitted limits.
Entry on plant diagram.
List of applications.
Entry on plant diagram.
Network size within allowed
limits.
Distributed bus power.
Central bus power supply.
Number of bus devices per line
and area.
Size of network.
Adequate bus power (with
reserve for later expansion).
Complete installation and
commissioning documents.
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CE1P3127en
2013-04-08