PURPOSE

This document is an overview of the required guidelines for MicroE encoder extension and adapter cables. It will allow customers to design cables which will ensure the best quality and most reliable encoder performance

 

BACKGROUND

 

In many encoder applications, an extension cable or an adaptor cable needs to be created in order to route encoder cables through a machine and connect the encoder to the desired feedback input device. These devices commonly include digital readout displays (DRO), quadrature counting boards and servo amplifier and controllers and there are many different connect styles and pin-outs. MicroE routinely manufactures encoder models with custom cable lengths, connectors and pin-outs suited to match customer application needs. Many customers also design and build their own cables. This document provides key recommendations and guidelines for customers who are making their own cabling.

 

SOLUTION

 

Follow these recommendations for any customer supplied interface cable.

 

Maximum Length between encoder sensor head and receiving circuitry

    • Encoders specified as “422 compatible” (Mercury, MTE): 5 meters
    • Encoders specified as “422 compliant” (Optira, Veratus, Mercury II 5000): 10 meters
    • Mercury II 6000 drives the quadrature from the interpolation circuitry in the DB15 connector.

Maximum length from Mercury II 6000 connector to receiving circuitry: 10 meters

 

Cable Characteristics

Connections

 

Suggested cables for low flex applications (typically the grating/scale moves):

Suggested cables for high flex applications (typically the sensor head moves):

Suggested connectors:

 

DO’S & DON’TS:

 

Please contact Celera Motion Applications Engineering group with any questions regarding these recommendations.