New high resolution analogue input and encoder option boards are now available from Parker Hannifin , to enable users to enhance the flexibility and capability of the company’s AC890 series AC drives.
8903-EP encoder and 8903-AI analogue input option boards have been developed to provide users with additional inputs and outputs for processes that require them, such as:
- electronic line shaft applications
- machine tools; and
- other demanding motion control tasks.
All inputs on these devices are compatible with RS422 and RS485 encoders, as well as encoders that provide output voltages as high as ±30V.
These boards embed all the decoding logic required to interface the encoder input to the drive’s microprocessor, providing true ‘plug and play’ connectivity. Three non-isolated differential digital outputs are used for synthesising an encoder output.
8903-EP option boards are supplied installed on a drive that is pre-fitted with an 8902-EQ incremental encoder option, ensuring the devices can be used to create an electronic line shaft between reference and feedback encoders.
Adding a sixth analogue input to AC890 and AC890PX drives, 8903-AI analogue input option boards offer all the functionality of 8903-EP encoder option boards, as well as a high resolution 16-bit ±10V analogue input.
This configuration means the drives are well suited for use in machine tool applications, where drives will typically follow an analogue speed setpoint from a CNC, and send back to the CNC the position of the controlled axis.