Rockwell Automation 1771-DB Basic Module User Manual - Series A - Manual (Page 25)

Chapter 4
Using the Serial Ports
This chapter describes how to use the program serial port and the
peripheral serial port to connect terminals, Data Cartridge Recorders,
Digital Cassette Recorders, printers and other compatible devices.
The BASIC Module has a program serial port and a peripheral serial port
capable of connecting to various user devices (figure 4.1). You can
configure each port independently. Both ports are electrically isolated from
each other and from the backplane up to 500 V with no external power
needed. Both ports operate from 300 baud to 19.2K baud and default to
1200 baud.
Figure 4.1
Program/Peripheral Port Locations
If you use an RS-423/RS-232 device or an Allen-Bradley Industrial
Terminal you can use up to a 50 foot maximum cable length for
connections from either the program or peripheral ports. Refer to the
specifications section in Chapter 2 for cable length recommendations.
4.1
Chapter Objectives
4.2
Using the BASIC Module
Program and Peripheral
Communication Ports