
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 ±30V. The board embeds 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.
Installed on a drive pre-fitted with an 8902-EQ incremental encoder option, the new board can be used to create an electronic line shaft between the reference and feedback encoders.
The 8903-AI card adds a sixth analogue input to the AC890 and AC890PX drives. It offers all the functionality of the 8903-EP encoder option board, plus a high resolution 16-bit ±10V analogue input. This makes the drive particularly suited to machine tool applications, where the drive will typically follow an analogue speed setpoint from a CNC, and send back to the CNC the position of the controlled axis. It provides the fast response times required for accurate position control.
AC Drives Product Manager Andy Evans comments: “Option boards provide a very cost-effective means of tailoring a preferred drive to meet specific application requirements, or expanding a drive to meet the needs of applications as they evolve over time. These two new option cards expand the flexibility of the AC890 series which has proven itself to be a popular choice in some of the industry’s most demanding applications."
No comments:
Post a Comment