User's Manual
Table Of Contents
- SIMATIC RF300
- Legal information
- Table of contents
- 1 Introduction
- 2 Safety information
- 3 System overview
- 4 Planning the RF300 system
- 4.1 Fundamentals of application planning
- 4.1.1 Selection criteria for SIMATIC RF300 components
- 4.1.2 Transmission window and read/write distance
- 4.1.3 Width of the transmission window
- 4.1.4 Impact of secondary fields
- 4.1.5 Setup help of the readers of the second generation
- 4.1.6 Permissible directions of motion of the transponder
- 4.1.7 Operation in static and dynamic mode
- 4.1.8 Dwell time of the transponder
- 4.1.9 Communication between communications module, reader and transponder
- 4.2 Field data for transponders, readers and antennas
- 4.3 Installation guidelines
- 4.4 Chemical resistance of the transponders
- 4.5 Guidelines for electromagnetic compatibility (EMC)
- 4.1 Fundamentals of application planning
Planning the RF300 system
4.5 Guidelines for electromagnetic compatibility (EMC)
SIMATIC RF300
System Manual, 07/2016, C79000-G8976-C345-0x
103
The EMC measures are applied to all three components, in order to prevent malfunctions
due to interference. When setting up a plant, the manufacturer must take all possible
measures in order to prevent the occurrence of interference sources:
● Only devices fulfilling limit class A of VDE 0871 may be used in a plant.
● Interference suppression measures must be introduced on all interference-emitting
devices. This includes all coils and windings.
● The design of the system must be such that mutual interference between individual
components is precluded or kept as small as possible.
Information and tips for plant design are given in the following sections.
Interference sources
In order to achieve a high level of electromagnetic compatibility and thus a very low level of
disturbance in a plant, it is necessary to recognize the most frequent interference sources.
These must then be eliminated by appropriate measures.
Table 4- 62 Interference sources: origin and effect
Interference source
Interference results from
Effect on the interference sink
Contactors,
electronic valves
Contacts
System disturbances
Coils Magnetic field
Electrical motor
Collector
Electrical field
Winding
Magnetic field
Electric welding device
Contacts
Electrical field
Transformer Magnetic field, system disturbance,
transient currents
Power supply unit, switched-
mode
Circuit Electrical and magnetic field, system
disturbance
High-frequency appliances
Circuit
Electromagnetic field
Transmitter
(e.g. service radio)
Antenna Electromagnetic field
Ground or reference potential
difference
Voltage difference Transient currents
Operator Static charge
Electrical discharge currents, electrical
field
Power cable Current flow Electrical and magnetic field, system
disturbance
High-voltage cable
Voltage difference
Electrical field