The magnetic singleturn and multiturn absolute rotary encoders, series WDGA, possess new, outstanding qualities thanks to their patented EnDra technology.

The main features are

• EnDra: maintenance-free (no gear) and environmentally friendly (no battery)
• Single-/multiturn (12 bit/40 bit)
• Forward-looking technology with 32-bit processor
• 2-colour-LED as indicator for operating condition and error message appropriate CiA 303-3
• High shaft loads up to 220 N radial, 120 N axial
• High protection class IP67, shaft sealed to IP65
• Communication profile according to CiA 301
• Device profile for encoder CiA 406 V3.2 class C2
• CE and UL approval

Different flange types

• 36 mm, hollow shaft
• 36 mm, synchro flange
• 58 mm, synchro flange
• 58 mm, clamping flange

For latest information, please refer to www.wachendorff-automation.com/wdga

With their high resolution they are ideal for those applications, where high measuring accuracy as well as mechanical ruggedness is important. The interface provides the evaluation electronics with the complete position value, consisting of the combination of the singleturn position with the corresponding multiturn position based on the number of revolutions.

The resolution of the singleturn position is 12 bit (4 096 steps per revolution). The multiturn can handle up to 40 bit, depending on requirements. In practice, in the CAN profile, 32 bit are processed. Higher resolutions are transmitted via High Precision Objects. Despite its extremely high resolution, the maintenance-free encoder has need of neither gears nor back-up battery. This guarantees a long service-life for the mechanics as well as helping protect the environment.

With its exceptionally high shaft loads of up to 220 N radial and 120 N axial, it will work reliably and accurately for years to come.

The WDGA absolute encoders are equipped with a two-colour LED (red/green). Thanks to the differentiated change in colour and the varying blinking frequencies of the LED, important status signalling can be read off directly. The WDGA absolute encoders can thus be integrated quickly and easily into the existing CAN network topology.

Operating principle of the EnDra technology for the multiturn

The Wachendorff WDGA encoders do not require mechanical gears to detect the number of revolutions and the direction of rotation. Instead the revolutions are determined by means of an energy wire (EnDra): a permanent magnet accumulates in the wire so much energy that for a defined position the information "revolution" and "direction of rotation" is transmitted to the evaluation electronics. An external energy feed, for example by means of a battery, is not required for this. The result is that this patented system is able to work fully autonomously.