Modified Angle Encoder for Functionally Safe Applications

June 26, 2017

HEIDENHAIN updates its successful angle kit encoder line again by modifying the ECA 4000 angle ring encoder series for use in safety-related applications.

Of notable use in machines where hazardous conditions exist, HEIDENHAIN’s new ECA 4410 encoder is useful in many automation applications such as in robotic arms for example.

Factors contributing to this new functionally safe ECA 4410 encoder is the EnDat data interface as well as modifications made to the mechanical connection that now includes fault exclusion. Here, the new ECA 4410 drum has a centering collar on the inside diameter, to center it via a fit on the mating shaft. These scale drums also have additional back-off threads for disassembly. This, and if the machine manufacturer adheres to the dimensioning of the mechanical connections, provides fault exclusion for the loosening of the mechanical connection, thus functional safety. This ECA 4410 drum is the only one on the market where the fault exclusion is ensured under all specified operating conditions.

modified angle encoder

The ECA 4000 angle encoders from HEIDENHAIN provide absolute position measuring with large hollow shaft diameters of up to 512 mm.

In conjunction with a safe control, the ECA 4410 can be used as a single-encoder system in applications with control category SIL 2 (as per EN 61508) and Category 3 PL performance level “d” (as per EN ISO 13849-1).

In addition, the ECA 4410 scanning heads were also modified for functional safety with changes to the holes for mounting. The threads for mounting the scanning unit from the back face were expanded and placed a little lower to permit the use of longer screws. Mechanical fault exclusion is ensured if the specified tightening torque and the minimum screw length are complied with.

The new ECA 4410 drums are mechanically compatible with the normal ECA 4000 line as well as the ERA 4000 line of angle encoder feedback devices.

Want to learn more?

Contact us today

Related resources and news

Encoders with Siemens DRIVE-CLiQ

SCHAUMBURG, IL (January 2020) – In order to meet the needs of manufacturers of small servo motors and actuators, HEIDENHAIN introduces an expansion of its small-diameter 1000 and 1100 series rotary encoders with added versions now available with Siemens DRIVE-CLiQ. HEIDENHAIN’s models ECN/EQN 1000S, ROC/ROQ 1000S and ECN/EQN 1100S rotary encoders with integrated DRIVE-CLiQ interface […]

Read more »

How to Select A Servo Motor

Updated on: 12/20/2019 Servo motors are a type of electric motor (rotary actuator) that allows for precise control of position, velocity and acceleration. They employ a closed-loop system, meaning there’s a feedback device (like an encoder) that communicates with a control such as a CNC machine control. Magnetism controlled by electricity is used to drive […]

Read more »

4 Popular Servo Motor Applications

Servo motors are relied on far and wide for controlled linear or angular motion. They are deployed in systems we interact with every day as well as more specialized mechanical systems. Typically working with a positional feedback device, such as an encoder or resolver, servo motors also require a control to communicate back and forth […]

Read more »