In AGVs, lifting platforms, automated equipment, and intelligent door control systems, Safety Edges play an important role in end-point protection and serve as the final physical safety barrier during equipment operation.

Many customers encounter similar problems during project implementation: the equipment stops normally during on-site pressure testing but fails to pass the final machine acceptance inspection; the equipment frequently stops unexpectedly during operation, disrupting production; or the purchased product begins to deteriorate after only a short period of use, creating potential safety risks.

Although it may look like nothing more than a rubber strip, a Safety Edge involves many details, including standards and certifications, operating-condition matching, installation, and wiring. Today, based on the issues most frequently raised by customers, we will share several practical tips for product selection.

01 Why Can the Equipment Stop When Pressed but Still Fail the Safety Acceptance Test?

Some standard products can only provide basic stop-on-press functionality. They lack fail-safe design and the necessary third-party certifications. If a wire breaks, internal materials deteriorate, or the outer covering is damaged, the protective function may fail completely without generating an alarm signal, leaving the equipment effectively unprotected without any visible warning.

For complete-machine safety assessments, major-customer factory inspections, and export equipment, a Safety Edge should be used together with a safety relay or safety controller to build a closed-loop safety circuit and enable wire-break fault monitoring. True equipment safety is not simply about “being able to activate”; it must also ensure that faults can be detected and that a failure does not leave the equipment unprotected.

02 How Should You Troubleshoot Unexpected Equipment Stops Without Any Obstacle Present?

When equipment stops even though there is no obstacle, the problem is usually not product quality but improper selection or installation for the actual operating conditions.

For example, using a Safety Edge with an excessively low trigger force in a high-vibration environment can cause false triggers from minor equipment jolts. If the bending radius is too small during installation, the internal sensing structure may remain under stress for a long time, resulting in intermittent signal abnormalities. Dust and moisture entering the interior can also cause false triggering.

Professional product selection is never about choosing the highest sensitivity possible. Matching the operating conditions and prioritizing stability are essential for balancing production efficiency and equipment safety.

03 How Should You Choose Between IP65 and IP67? Avoid Blindly Pursuing a Higher Protection Rating

Many people instinctively choose a higher IP rating when selecting products, but this can easily result in excessive performance and unnecessary costs.

For standard indoor workshops, clean environments, and ordinary automated equipment, IP65 protection is generally sufficient and offers better cost-effectiveness. For outdoor applications, exposure to rain, humid environments with standing water, or short-term immersion, an IP67-rated product is recommended.

It is also important to note that all IP ratings depend on a complete sealing process. If the product is cut on site, or wiring and end sealing are not properly handled, even a high protection rating can be compromised.

04 Reference Service Life of Safety Edges and the Need for Regular Maintenance

A properly manufactured industrial-grade Safety Edge can provide a mechanical life of more than 3 million cycles. Under clean and stable indoor operating conditions, it can typically provide stable service for 5–7 years.

If the equipment is continuously exposed to oil, chemicals, sunlight, rain, or frequent compression, rubber aging and internal structural wear can accelerate significantly, shortening the service life. A Safety Edge is a critical safety wear component, not a “install once and forget forever” product. Regular functional pressure tests and visual inspections of the rubber strip are recommended to identify potential problems early and prevent failures.

05 Can a Safety Edge Be Connected Directly to a Standard PLC I/O Point?

Direct connection to a standard PLC I/O point is not recommended. Standard I/O ports cannot identify faults such as open circuits or short circuits. If the wiring is damaged or broken, the Safety Edge may lose its protective function without generating any warning, creating a safety gap.

The compliant standard solution for safety acceptance is: Safety Edge + safety relay, forming a closed-loop safety circuit that provides real-time fault self-monitoring, alarm functions, and emergency shutdown. This can meet the safety requirements and acceptance specifications for complete machine systems.

Conclusion

Industrial safety depends on details and long-term reliability.

The true value of a Safety Edge is not simply its ability to operate reliably during normal conditions, but its ability to respond reliably when danger occurs and provide timely warnings when equipment abnormalities arise. Only by selecting the right product for the actual operating conditions, following proper installation and commissioning procedures, and carrying out routine maintenance can this small but critical safety barrier continuously protect personnel and equipment.

When it comes to equipment safety, no detail is insignificant—details determine long-term stability.

If you are unsure which Safety Edge is suitable for your operating conditions, need to meet equipment acceptance requirements, or need to resolve false stops and aging issues, feel free to contact us. We can recommend an appropriate safety protection solution based on your specific application.