RESOLUTE™ FS absolute encoder system with RTLA30 linear scale
Features
- Serial interfaces: BiSS® Safety, Siemens DRIVE-CLiQ®
- Readhead size: 36 x 16.5 x 17.2 mm
- Resolutions to 1 nm at 100 m/s
- ±5 µm/m accuracy at 20 °C
- Scale coefficient of thermal expansion at 20 °C: 10.1 ±0.2 µm/m/°C
- Certified to:
ISO 13849 Category 3 PLd
IEC 61508 SIL2
IEC 61800-5-2 SIL2
Benefits
- Tape scale convenience and unrivalled ruggedness
- Carrier-type scale system for quick, easy installation and replacement of scale
- Excellent motion control performance
- Wide set-up tolerances
- Less than 10 nm RMS jitter for improved positional stability
- Optional Advanced Diagnostic Tool
What is the RESOLUTE FS encoder?
The RESOLUTE FS (Functional Safety) series is a true-absolute, fine pitch optical encoder system that has excellent dirt immunity, and an impressive specification that breaks new ground in position feedback. It is the world's first absolute encoder capable of 1 nm resolution at up to 100 m/s. Ultra low Sub-Divisional Error (SDE) and jitter result in a rotary encoder system that outperforms any other encoder in its class. Certified to SIL2 and PLd for use in Functional Safety applications.
What is RTLA30 scale?
RTLA30 is a low profile stainless steel tape scale featuring 30 µm pitch absolute scale code. It is accurate to ±5 µm/m and available in lengths up to 21 metres. Two mounting options are available, both of which allow independent thermal expansion and tape scale convenience.
RTLA30 can be used with the revolutionary FASTRACK™ scale carrier system. This system allows a track to be laid quickly and easily with no need for fixing holes. A sacrificial spacer is removed and the tape scale is then fed into the track.
RTLA30-S is laid onto the substrate with self-adhesive backing tape. The self-adhesive is formulated in such a way that it allows for independent scale expansion to that of the substrate.
To complete the installation, both types of scale are clamped at one point to provide a datum position.
Why choose this encoder system?
Easy fault finding and servicing
The Advanced Diagnostic Tool ADTa‑100 acquires comprehensive real-time data from RESOLUTE™ encoder readheads (marked with the ADT symbol). The information is displayed via the user-friendly ADT View software interface. Whilst in most cases the integral set-up LED on the encoder is sufficient for setting up the system, the ADT can be used to aid more challenging installations. The ADT can also report on encoder performance and assist system fault finding to avoid lengthy machine downtime.
Functional Safety certification
The RESOLUTE FS series is a true-absolute open optical encoder system with certification to the following Functional Safety standards:
ISO 13849 Category 3 PLd
IEC 61508 SIL2
IEC 61800-5-2 SIL2
Certain machinery safety functions, such as Safety Limited Speed (SLS), require the encoder feedback to be functionally safe. Utilising an encoder system that is already rated for use in these applications can make machine certification significantly easier. Adopting these advanced machine safety functions allows machine builders to make safer machines, capable of higher functionality that can reduce set-up times and machine downtime.
Wide set-up tolerances
The RESOLUTE FS series does not follow the conventional technique of using dual tracks side-by-side (one incremental, one absolute) which inherently suffers de-phasing problems when small amounts of angular misalignment are introduced. Instead, this absolute encoder features a single track, optical absolute scale, combining both the absolute position and embedded phase information into one single code. This technology provides RESOLUTE FS encoders with far wider set-up tolerances (yaw tolerance ±0.5°) for quick and easy installation and superior long-term reliability, even if the motion axes settle or move over time. To further aid installation and diagnostics, there is an integral set-up LED on the readhead.
External interface option
Siemens DRIVE-CLiQ external interface
- Required for Siemens DRIVE-CLiQ serial interface
- Also available in dual head input for high accuracy rotary systems
- Displays communication alarms
- Duplicates readhead LED
No external interface is required for the other available serial interfaces.
Optional Advanced Diagnostic Tool ADTa-100
RESOLUTE encoder readheads (marked with the ADT symbol) are 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
Serial interfaces
| Serial interfaces | Description |
| BiSS Safety | Renishaw 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. RESOLUTE FS with BiSS Safety is available in both linear and rotary (angle) encoder versions. |
Siemens DRIVE-CLiQ | RESOLUTE FS with Siemens DRIVE-CLiQ serial interface is available (using external interface) for linear and rotary applications. Siemens DRIVE-CLiQ is the innovative, powerful communications interface to connect encoder and direct measurement systems with SINUMERIK and SINAMICS drive components. |
Refer to data sheet for full details.
Technical specifications
Measuring standard | FASTRACK RTLA30: stainless steel tape scale with carrier system RTLA30-S: stainless steel absolute coded tape scale with self-adhesive backing tape, for mounting directly to a substrate without the FASTRACK guide rails |
Readhead size (LxWxH) | 36 mm x 16.5 mm x 17.2 mm |
Scale pitch | Nominal 30 μm |
Thermal expansion coefficient at 20 °C | 10.1 ±0.2 μm/m/°C |
Accuracy grade at 20 °C | ±5 μm/m |
Scale length | BiSS Safety: up to 21 m for 1 nm resolution and up to 13.42 m for 50 nm resolution Siemens DRIVE-CLiQ: up to 17.18 m for 1 nm resolution and up to 13.42 m for 50 nm resolution |
Maximum speed | Up to 100 m/s (See data sheet for details) |
Serial interfaces* | BiSS Safety, Siemens DRIVE-CLiQ† |
Resolutions | 50 nm and 1 nm resolutions |
Sub-Divisional Error (SDE) | ±40 nm |
Electrical connection | BiSS Safety: up to 10 m cable lengths, 9-way D and M12 connector Siemens DRIVE-CLiQ interface: up to 10 m cable lengths and M12 connector |
Power supply | 5 V ±10%, max 250 mA @ 5 V (terminated) |
Vibration (operating) | 300 m/s2 max @ 55 Hz to 2 000 |
Shock (non-operating) | 1 000 m/s2, 6 ms, ½ sine |
Operating temperature | 0 °C to +80 °C |
Sealing | IP64 |
Refer to data sheets for full details.
†For BiSS Safety and Siemens DRIVE-CLiQ specifications, refer to data sheets.