Requirements for the functioning of the control system
Version 2
RES-5008
Page 9
• A very important design measure is copper-coating or silver-coating of the heating element ends. The thermal
characteristics change in this range through coating of the heating element ends. As a result, the ends remain
cold, which permits exact temperature control and increases the useful life of the heating element and the wear
materials (e.g. silicone underlayment, heating band cover).
4.2
Impulse transformer
A suitable impulse transformer is required for the control loop to function properly. The power and the secondary
voltage must be laid out for the control loop. According to EN 61558 or UL 5058, the transformer must be laid out
as an isolating transformer with reinforced insulation and have a single-chamber structure. Adequate protection
against accidental contact must be provided when assembling the impulse transformer. The relevant national
installation and construction regulations must be observed, while doing so. Water, cleaning solutions and / or con-
ductive liquids may not come into contact with the impulse transformer.
The cable cross-sections must be designed as per the ROPEX application report.
Incorrect assembly and installation of the impulse transformer impair electrical safety.
The terminals on the pulse transformer must be checked and tightened regularly.
4.3
Current transformer
The current transformer appropriate for RESISTRON
®
Temperature Controller is part of the control system.
In order to avoid malfunctions, only the original ROPEX current transformers or ROPEX monitoring current trans-
formers may be used.
The current transformer may be operated only if it is correctly connected to the RESISTRON
®
Temperature Con-
troller (See Chapter “Start-up”). The safety-related information in the “Mains connection” chapter must be
observed. External monitoring modules can be used to increase operational safety furthermore. Monitoring mod-
ules are not part of the standard control system and are described in separate documentation.
4.4
Line filter
ROPEX offers line filters in various performance classes. The ROPEX Application Report lists the suitable line
filter, which can be ordered.
For fulfilling the guidelines mentioned in the section 1.5 "DECLARATION OF CONFORMITY" on page 6, it has
been stipulated to use an original ROPEX line filter. Installation and connection must be carried out in accordance
with the instructions in the "Mains connection" chapter or the separate documentation for the respective line filter.
4.5
Application report
The ROPEX application report contains all the important technical information on your sealing applications. If you
have several applications in a system, these are displayed in the application report on different pages and col-
umns. This allows you to easily differentiate between them. The application report is created individually by
the ROPEX application team and is the basis for the electro-technical design of your sealing applications.
The ROPEX application report contains the following information among other things:
• List of the different heating element dimensions
• Specification of the necessary temperature coefficient
