ALLEN BRADLEY 1747-L551 PLC Processor

RS-232 Communication Interface
B–3
SLC 500 Devices that
Support RS-232
Communication
The SLC 500 product line has three other modules, aside from the
SLC 5/03, SLC 5/04, and SLC 5/05 processors, that support the
RS-232 communication interface. They are the DH-485
Communication Interface (1770-KF3), the BASIC module
(1746-BAS), and the DH-485/RS-232C Interface (1747-KE). All
three of these modules can be used with either the SLC 5/01 or SLC
5/02 processor.
1770-KF3 Module
The 1770-KF3 module links host computers with the Allen-Bradley
DH-485 Data Highway. The host computer communicates with the
1770-KF3 over an RS232 link using DF1 protocol. Through the
1770-KF3, the host computer can communicate with the nodes on
the DH-485 network.
For more information on the 1770-KF3 module, see the DH-485
Communication Interface User Manual, Catalog Number
1770-6.5.18.
1747-KE Module
The 1747-KE is a communication interface module that acts as a
bridge between DH-485 networks and devices requiring DF1
protocol. You can configure the DF1 port on the 1747-KE for
RS-232/423, RS-422, or RS-485 devices. Residing in an SLC 500
chassis, the 1747-KE is ideally used as an interface module, linking
remote DH-485 networks via a modem to a central host.
For more information on the 1747-KE module, see the
DH-485/RS-232 Interface Module User Manual, Catalog Number
1747-6.12.
1746-BAS Module
The 1746-BAS module, which is programmed using the BASIC
language, has two configurable serial ports for interfacing to
computers, modems, serial printers, and other RS-232 compatible
devices. You can also use it for off-loading complex math routines
from an SLC 500 processor; this conserves ladder logic memory.
For more information on the 1746-BAS module, see the SLC 500
BASIC Module Design and Integration Manual, Catalog Number
1747-6.1.
Publication 1747-6.2