Auxiliary Encoder Interface

All encoder input signals (CN1B) are filtered using analog and digital filtering,

including illegal state change detection.

The input circuitry includes pull-up and pull-down resistors for compatibility

with single-ended and open collector signals, in addition to differential signals.

A single channel schematic of the auxiliary encoder interface is shown in the

figure below.

Understanding Serial Interfaces

The Ultra5000 contains two identical serial port connectors (Main Serial Port

CN3A and Auxiliary Serial Port CN3B) that implement the standard NRZ

asynchronous serial format, and support RS-232. RS-422. and RS-485

communication standards.

Standard baud rates include 1.200. 2.400. 4.800. 9.600. 19.200. and 38.400

baud. Data lengths of 7 and 8 bits are supported.

The connector pinout dedicates separate pins for the RS-232 and RS-422/

RS-485 signals, so that the communication standard can be changed by just

using a different cable. Refer to Figure 2.7 for the serial interface hardware

configuration.