Parker Hannifin input and encoder boards for AC890 drives

High-resolution analog input and encoder option boards for the AC890 Modular Systems and AC890PX High Power Systems AC drives have been released. These option boards provide the extra inputs and outputs required in the likes of electronic line shaft applications, machine tools and other demanding motion control tasks.

The 8903-EP encoder option board features an incremental encoder input for a reference encoder and a synthetic encoder output. The encoder input provides optically isolated differential inputs on channels A, B and Z. All inputs are compatible with RS422 and RS485 encoders, as well as encoders that provide output voltages as high as ±30 V. The board embeds all the decoding logic required to interface the encoder input to the drive’s microprocessor, providing plug-and-play connectivity. Three non-isolated differential digital outputs are used for synthesising an encoder output.

Installed on a drive pre-fitted with an 8902-EQ incremental encoder option, the 8903-EP board can be used to create an electronic line shaft between the reference and feedback encoders.

The 8903-AI card adds a sixth analog input to the AC890 and AC890PX drives. It offers the functionality of the 8903-EP encoder option board, plus a high-resolution 16-bit ±10 V analog input. This makes the drive suited to machine tool applications, where the drive will typically follow an analog speed setpoint from a CNC and send back to the CNC the position of the controlled axis.