Application description of Weidmueller safety relay in corrosive environment

The Weidmüller weidmueller SAFE series of SIL3 safety relays successfully withstood tests of corrosive gases in their laboratories for more than 30 days. The success of the experiment is attributed to the additional protection of Weidmüller's electronic products, which is proof that the Weidmüller SAFE series of SIL3 safety relays can provide value-added solutions for applications such as offshore or chemical infrastructure.
 
Offshore infrastructure such as wind turbines or oil platforms is often eroded by salt spray. Certain chemical infrastructures have been exposed to the air of chlorine or hydrogen sulphide. This environment can cause corrosion of metallic materials, which can lead to premature wear of the installed equipment. Of course, this situation will not only occur on components that have been exposed for a long time, even the control cabinet has no way to protect the components in the cabinet from external influences. If there are no additional protective measures, such as positive pressure ventilation in the control cabinet, the polluted air will seep into the control cabinet and the control cabinet will be exposed to corrosive substances such as acid, salt spray or moisture.
 
Suitable for corrosive environments
Joachim Janik, Weidmüller Weidmueller Product Manager, said: "In particular, in a safety system, if any installation system is unusable due to corrosion, it will bring great danger. In the worst case, even if it is achieved The required SIL rating will also fail under certain circumstances. In order to reduce this risk for our customers, we have not only introduced the SAFE series of SIL3 safety relays to ensure safe use in this corrosive environment, and we will also Series safety relays are rigorously tested before field application to ensure the effectiveness of our protective measures."
 
Weidmüller's electronics in the SAFE series of SIL3 safety relays are coated with a professional protective layer to ensure reliable protection of these electronic components. Janik said in the challenge of the product's challenge: "If we use too much coating, it will cause the performance of the SAFE series SIL3 safety relay to be reduced. But if there are too few, there is no way to achieve the required protection. Testing in our laboratory demonstrates that the coatings we use are the most appropriate and provide the best protection for our SAFE Series SIL3 safety relays."
 
Application in G3 environment
The Weidmüller weidmueller SAFE series of SIL3 safety relays were tested at the Weidmüller laboratory and were continuously exposed to corrosive gases for a full month. According to the EN60068-2-60 standard, Weidmüller conducted a mixed gas test, also known as four sets of corrosive gas tests. However, the concentration of corrosive gases set by weidmueller Weidmüller was adjusted to the G3 ISA level (American Society of Instrumentation ISA S71.04-1985). This rating is much higher than the actual standard for four sets of corrosive gas tests.
 
Through this test, weidmueller Weidmüller can very accurately simulate the actual environmental conditions encountered. Wolfgang Nietzsch, head of the Weidmüller weidmueller electronics laboratory, said: "The general test standard period is 30 days. In order to ensure foolproof, our test duration has exceeded this period. During the whole test period, our SAFE series SIL3 safety The relays are all functioning properly. This functional test proves that the coating on the PCB is well protected against corrosive gases. We must ensure that our products will never have any problems under any circumstances."
 
After the corrosive gas test was completed, Weidmüller weidmueller was inspected by a microscope and the results showed that the Weidmüller weidmueller SAFE series SIL3 safety relay was intact. Although the corrosive gas did not cause any damage to the Weidmüller SAFE series SIL3 safety relay in the harsh test environment. Janik concluded by saying: “We know that our customers are paying more and more attention to products that achieve SIL protection, even in the corrosive environment of G3. We have proved our success through successful corrosive gas tests. The SAFE series of SIL3 safety relays are fully suitable for applications in this environment and are also noted in our factory declarations."