FSI 608
Certified up to SIL3/PLe for industrial applications.
Meet FSI 608 – our certified safety encoder that provides reliable protection for people and machines. The encoder fulfils the latest safety requirements and is certified up to SIL3/PLe, Cat. 4.
Reliable, robust, and ready for any application
With the FSI 608, we continue our commitment to delivering high-quality products that offer maximum value. Designed to meet the highest safety standards, it also features a robust mechanical construction built to withstand the demanding industrial environments.
Key features
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Available in freely scalable accuracy and total resolution up to 31 bit (19 bit singleturn + 12 bit multiturn), safe absolute accuracy ±0.89°
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Anodized aluminum housing with stainless steel shaft
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Wide selection of shafts and flanges for flexible mechanical integration
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PROFIsafe for safe communication
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Compliant with IEC 61800-5-3 and certified up to SIL3/PLe, Cat. 4
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Accurate safety data: 10 safe bits
Fulfilling the safety requirements with PROFIsafe
In the FSI 608 we give you safe communication for a PROFINET environment with the PROFIsafe protocol that supplies safe real-time values for the automation market.
To ensure a reliable safety solution, the FSI 608 built-in safety functions seamlessly connect with your safety system. The user can fulfill the safety requirements and prevent process errors and downtime giving you a solid investment for your machine.
The encoder fulfil the latest safety requirements and is certified up to SIL3/PLe, Cat. 4.
Why choose FSI 608?
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Enhanced safety: Certified for functional safety, the FSI 608 provides reliable position and speed data to help you meet strict safety requirements.
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Maximum flexibility: A wide range of mechanical and electrical options ensures seamless integration into your existing setup.
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Long-term reliability: Built with high mechanical specifications and designed to withstand demanding environments.
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Precision you can trust: High-resolution output gives you the accuracy needed for precise motion control.
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Future-proof investment: Scalable resolution and multiturn capabilities support evolving application needs.
Built-in safety functions
The FSI 608 encoder supports a wide range of safety functions, configurable via safe fieldbus communication with the control system:
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Standstill detection
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Position monitoring
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Overspeed protection
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Acceleration monitoring
Functional safety explained
There are several safety functions used in machinery and automation systems. These functions are integral to functional safety systems, designed to ensure safe machine operation and prevent hazardous situations:
STO – Safe torque off |
SSR – Safely speed range |
SS1 – Safe stop 1 | SLP – Safely-limited position |
SS2 – Safe stop 2 | SLI – Safely-limited increment |
SOS – Safe operating stop | SDI – Safe direction |
SLA – Safely-limited acceleration | SBC – Safe brake control |
SAR – Safe acceleration range | SCA – Safe cam |
SLS – Safely-limited speed | SSM – Safe speed monitoring |
Discover our FSI range
At Leine Linde, safety comes first. With decades of experience in industrial automation and functional safety, we help you design systems that are not only compliant but also precise and reliable.

800 series


900 YAWMO
Let's discuss safety solutions!
Ready to take your safety project to the next level? Connect with our experts today to explore how we can enhance your operational safety and reliability.
