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.

Routing High and Low Voltage Cables

Be aware that when you connect and route power and signal wiring on a

machine or system, radiated noise from nearby relays (relay coils should have

surge suppressors), transformers, and other electronic drives can be induced

into motor or encoder feedback, communications, or other sensitive, low

voltage signals. This can cause system faults and communication problems. To

minimize the levels of radiated noise, route machine power and signal lines

separately.