COVER STORY ADVERTISEMENT FEATURE
TARTS: WHY CKS2 AND CTS UR NEXT MACHINE DESIGN
COMPLIANCE, BUT ALSO BEHAVIOUR
The standards matter. PUWER and the framework around the Machinery Directive or Machinery Regulation set clear duties. But many incidents begin with behaviour, not with a failed component. People bypass systems when those systems slow them down. The opposite is also true. When safe entry is quick, clear and predictable, people follow the process. That is the quiet benefit of electronic key
The best safety solutions are the ones people use without thinking about them. CKS2 and CTS fit that idea
moves inside for recovery, and only that aisle restarts when the sequence is complete. There is no central key distribution station, so there is less overhead for the shift. Cells with shared access. When several
trained operators share responsibility for a cell, CKS2 supports simple grouping. Keys can be taught on the adapters that matter for that cell only. Through an IO-Link gateway you can read the key data you need for your own logs or work permits without wiring the entire area into a networked access control system. Retrofit projects. When a plant upgrades an old mechanical guard to meet current standards, a compact CTS often fits the frame without re-engineering. Where the task calls for controlled entry rather than a full door system, a single CKS2 adapter and keys bring the process up to date without a large hardware change.
WHAT THE CONTROL ENGINEER NEEDS TO KNOW Both devices were designed with straightforward integration in mind. • Safety integrity. CTS and CKS2 both achieve PL e to EN ISO 13849-1. CTS is a guard locking device to EN 14119. This gives a clean path for the safety function design and validation.
• Wiring. CKS2 provides safety outputs and status indication. Teach-in is done on the adapter, which keeps replacement simple. CTS offers the usual safety contacts plus rich status via the LED, and optional IO-Link for device and process data.
• Diagnostics. Clear local indication reduces call-outs. Where deeper information helps during commissioning or for
predictive maintenance, IO-Link provides it without turning the design into a full networked system.
• Documentation. Because Flex Function is set by the actuator, your documentation should note the taught behaviour and the actuator type used. That keeps maintenance and validation clean when a device is replaced.
WHAT THE MAINTENANCE TEAM WILL CARE ABOUT Two things usually dominate feedback from maintenance. First, how fast can we get back into production after a safe entry. Second, how hard is it to keep the system in good condition. CKS2 helps with both. It
removes mechanical wear from the access point, reduces the number of places a key can stick, and makes lost keys a minor event rather than a multi-week delay. CTS helps because it is compact, sealed, and easy to understand at a glance. The LED shows state and fault. The strong lock keeps doors closed even with vibration and pull. And if the safety behaviour needs to change, an actuator swap is faster than a switch replacement.
JULY/AUGUST 2025 DESIGN SOLUTIONS 13
access and modern guard locking. They allow you to design a flow that aligns with the job. Operators do not have to hunt for a master key. Supervisors can block a lost key without a site wide recall. Engineers can validate a clear safety function at PL e and still give the team inside the cell the manual moves they need to recover a fault.
CLOSING THOUGHT The best safety solutions are the ones people use without thinking about them. CKS2 and CTS fit that idea. They let you keep people out of harm’s way, they support the way modern plants run, and they trim the minutes that disappear during short stops. For design engineers and control engineers, they simplify selection and integration. For maintenance, they cut hassle. For management, they convert safety into uptime. For more on the product details and
application notes, see EUCHNER’s information on CKS2 and CTS, or speak with EUCHNER UK for guidance on your specific machine.
EUCHNER (UK) T: 0114 256 0123
www.euchner.co.uk
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