OPTICALENCODERS

All Optocode models are available with hollow or solid shaft versions and are IP65 protected to with- stand harsh industrial environments. Special stain- less steel or explosion-proof encoders for hazar- dous areas are also available. All models transmit digital measurement values to control systems either by parallel, serial or any common field bus interface. Standardized interfaces like Profibus-DP, CANopen, DeviceNet or Industrial Ethernet feature simplified connections and stable data transmission while also safeguarding investment assets. Functionality The Optocode (OCD) series uses a highly integra- ted Opto-ASIC providing a resolution up to 16 bits (65536 steps) per turn, as well as additional incre- mental signals. Without backup batteries the measuring range isincreased up to 16384 revolutions using mecha- nical gearing. Measuring Principles Optical encoders are made up of a revolving shaft with a code disc and an optoelectronic scanning unit consisting of a screen and photo receptors. Infrared light from an LED source passes through the code disc and the screen behind it. At every angle position a different sequence of photo recep- tors are blocked from light by dark segments on the code disc.