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FORTiS-N™ FS enclosed absolute encoder

FORTiS-N FS (Functional Safety) enclosed encoder system

  • Narrow size

  • ±3 µm or ±5 µm accuracy

  • 30 g vibration resistance

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Introducing FORTiS-N FS

The FORTiS-N FS encoder series is a next generation linear enclosed absolute encoder with a narrow cross-section for space-constrained applications in harsh environments such as machine tools.

Robust, rugged, high-performance position measurement over the encoder's long life is ensured by a range of innovative design features:

Ideal for machine tool applications

Renishaw has over 40 years of experience in the machine tool industry.

Our experts have designed the FORTiS series as a next generation linear enclosed absolute encoder for use in harsh environments.

NC4+ Blue with facemill tool

Serial interfaces

Serial interfacesDescriptionData sheet
BiSS® SafetyRenishaw supports BiSS Safety (unidirectional) open protocol for absolute encoders. BiSS Safety is a high-speed serial interface, perfect for dynamic axes that require high acceleration, smooth velocity control, excellent bi-directional repeatability and rock-solid positional stability.

Siemens DRIVE-CLiQ®

FORTiS FS encoders with Siemens DRIVE-CLiQ serial interface allow the connection of encoders and direct measurement systems with SINUMERIK and SINAMICS drive components.


Optional Advanced Diagnostic Tool ADTa-100

Advanced Diagnostic Tool ADTa-100

The FORTiS encoder system is compatible with the Advanced Diagnostic Tool ADTa-100 and ADT View software. They provide comprehensive real-time encoder data feedback to aid more challenging installations and diagnostics. The intuitive software interface can be used for:

  • Remote calibration
  • Signal optimisation over the entire axis length
  • Digital readout of encoder position (relative to the scale)
  • Exporting and saving data
  • Setting zero

Technical specifications

Measuring standard

Stainless steel tape scale with single track absolute encoding

Coefficient of thermal expansion at 20 °C

10.1 ±0.2 μm/m/°C

Thermal datum

At centre position (encoder position of 0.5 × measuring length)

Accuracy grade at 20 °C

High: ±3 μm

Standard: ±5 μm

Scale length

70 to 2040 mm

Maximum speed

(See data sheet for details)

Up to 4 m/s

Serial interfaces

BiSS Safety, Siemens DRIVE-CLiQ


1 nm, 10 nm, 50 nm

Electrical connection

Encoder: cable connector M12 custom (customer configurable exit direction)

Controller: 8-way M12, 17‑way M23, 9-way D-Type, 14‑way LEMO, flying lead

Power supply

5 V ±10% 1.25 W maximum (250 mA @ 5 V)

Vibration (operating)

Readhead: < 300 m/s² to IEC 60068-2-6

Housing without mounting spar: < 200 m/s² to IEC 60068-2-6

Housing with mounting spar: < 300 m/s² to IEC 60068-2-6

Shock (non-operating)

< 300 m/s² IEC 60068-2-27

Operating temperature

0 °C to +50 °C


IP53 when installed correctly, IP64 with air purge

Do you have customisation requirements?

With over 40 years experience in machine tool metrology and encoder applications, our expert team of engineers may be able to assist with your own unique requirements.