Allen-Bradley 1746-BAS, User Manual, Page: 25 / 84

Publication 1746-UM004A-US-P
Module and Development Software Overview 1-13
Figure 1.10 shows the module using DF1 to control communications with a
modem. In this configuration, the module is interfaced with a DH485 network
through a peer-to-peer communication interface with full-duplex, DF1 protocol.
Figure 1.10 Full-Duplex, DF1 Protocol Configuration
The modems in this configuration may be dial-up. If the modems are dial-up, the
BASIC program may initiate dial-up and then switch port PRT2 to DF1 protocol
when connection is made to the 1747-KE or 1770-KF3 DH485 Communication
Interface Module. Port PRT2 on your module must be configured as having DF1
protocol. See chapter 3 for additional information on port configuration.
The 1747-C13 Cable acts only as a communication link and does not carry 24V dc
power. The 1747-C10 or 1747-C11 Cable carries 24V dc power from the
processor to the link coupler. (The 1747-C10 Cable and 1747-C11 Cable are
interchangeable.)
(1) The 1747-KE module can be replaced by the 1770-KF3 DH485 Communication Interface Module. The KF3 is a stand-alone version of the KE module.
Personal Computer with BASIC
Development Software
SLC 500
Controller with
BASIC or
BASIC-T
DH485 Communication
Cable
(Belden #9842)
SLC 500
Controller
Modem
1747-C11 Cable
1747-C13 Cable
Link Coupler
1747-AIC
SLC 500
Controller
with 1747-KE
Module
(1)
1747-C11 Cable
Modem
Link Coupler
1747-AIC
Interface/Converter
RS-232 to RS-485
Catalog Number
1747-PIC
IMPORTANT
By configuring JW4 for DF1 communication on PRT2, DH485
communications are disabled.
Spare Allen-Bradley Parts