DATA SHEET DBD01_05 Issue 05, 12th July 2024 ArtosTM Board Level Rotary and Linear Absolute Magnetic Encoder System ArtosTM is an absolute magnetic encoder system designed for motion control applications as a feedback element for angle and velocity control loops. A highly reliable measurement principle and processing ensure low position latency, high resolution and high angular velocity. The compact PCB-A design and low weight of the encoder system make it suitable for applications with limited space in relatively clean environments. TRUE ABSOLUTE SYSTEM PARALLEL OUTPUTS ABSOLUTE + ABZ HIGH SPEED AND RESOLUTION True absolute system High accuracy and resolution Suitable for highly dynamic control loops Compatible with solid rings and partial arc magnetic scales Wide installation tolerances SSI and BiSS C communicational protocols + parallel ABZ channel Compact design with horizontal or vertical connector LINEAR MOTOR

General information ArtosTM provides a true-absolute position information immediately after power-on via the selected communication protocol. The encoder system is extremely reliable due to the large installation tolerances (axial/radial/tangential offset) and the built-in robust algorithms for position calculation and error detection. The measuring principle is based on a magnetic ring/scale magnetised with the incremental and absolute track with a pseudorandom binary sequence (PRBS) read by the RLS proprietary sensor technology. Once installed, the encoder system does not need to be calibrated....

Storage and handling Storage temperature Operating temperature Readhead is ESD sensitive - handle with care. Do not touch electronic circuit, wires or sensor area without proper ESD protection or outside of ESD controlled environment. The PCB-A readhead is a mechanically sensitive component. Hold it by the edges, touch it only lightly, minimize pressure and avoid bending it while holding it securely to prevent it from falling. Ensure maximum cleanliness. When not in use, place it in ESD protective packaging (box or tray). Packaging Less than 20 readheads are packed individually in antistatic...

Dimensions drawing Dimensions and tolerances are in mm. Board with vertical connector Board with horizontal connector center line Absolute side Incremental side General tolerances for linear dimensions according to ISO 2768-m Tolerance class ±0.3 Absolute side Absolute side Bottom side Absolute side Incrementalside side Incremental Incremental side Absolute side Positioning holes on both sides of the board for poka-yoke installation Incremental side 3D model available for download at RLS website. Further information on compatible rings and scales can be found in SARD01 and ASD01, available at...

Installation instructions The readhead can be installed in 2 different ways - from below or from above. Carefully plan the orientation of the readhead and the ring/magnetic scale. The engraving on the ring and the imprint on the scale can be used to determine the orientation. We recommend the use of M2 fasteners with washers. For more information, please refer to the Table of recommended fastener tightening torques. After mounting the ring or magnetic scale with the readhead, make sure that the distance between them corresponds exactly to the installation dimensions and tolerances specified in...

Technical specifications System specifications Type of absolute measurement Pseudo-random binary sequence (PRBS) absolute code; RLS proprietary sensor technology Reading type <3.5 µm at nominal ride height SAR057 = 25 arcsec SAR081 = 18 arcsec SAR114 = 13 arcsec SAR162 = 9 arcsec SAR229 = 6 arcsec SAR325 = 4 arcsec SAR478 = 3 arcsec Unidirectional repeatability Up to 23 bits (depends on the ring size/magnetic scale) See Table of available resolutions. Sensor and processing latency Internal loop refresh rate Maximum speed during power up Electrical data Power supply From 4.75 V to 30 V (voltage...

Environmental data Operating and storage temperature Maximum external magnetic field during operation Electrical connections Vertical connector Horizontal connector Incremental output (AB channel) Power supply Serial communication (Absolute output) SLO+ (data) If conformal coating is applied, the output connector is not protected by the coating. System integration / Shield connection The mounting surfaces of the PCB are not connected to signal ground. To achieve EMC compliance, the encoder system must be correctly integrated. Particular attention must be paid to the shielding arrangements. The...

Status indicator LED Once the ring or magnetic scale has been installed, the readhead can be easily mounted on the machine using the LED setup indicator. The LED indicator shows the internal status of the encoder and is used to facilitate the installation and diagnosis of the encoder system. According to the table Detailed status description, certain errors are latched, resulting in LED indicating error status persistently. To clear latched error statuses, communication with readhead or readhead power cycle is required. Slow flashing of LED indicates that the encoder is receiving power, but communication...

Troubleshooting If the readhead reports an error during operation due to incorrect decoding of the absolute position on the magnetic ring/scale, this indicates a serious problem. Serious problems include incorrect installation or a damaged magnetic pattern on the ring or scale. To determine the cause of the problem, please proceed as follows: ⦁ Make sure that the part number on the readhead and the ring or scale match the required combination. The valid combination of ring and readhead can be verified with the first 6 letters of the part number. ⦁ Verify that the installation matches the specification...

BiSS C Communication interface The absolute position data and the status are available via the BiSS C protocol. The length of the position data varies depending on the combination of SAR ring, partial arc scale and selected resolution. In combination with the SAR ring, the length of the position data is up to 23 bits. In combination with the scale , the length of the position data is up to 28 bits. The position data is always right-aligned, MSB first and without padding bits. The absolute position is followed by 2 general status bits, which are active low (error and warning) and 6 bits CRC (inverted)....