Publication 1763-UM001E-EN-P - June 2015
Communication Connections 83
Connecting to a DH-485
Network
The network diagrams on the next pages provide examples of how to connect
MicroLogix 1100 controllers to the DH-485 network.
You can connect a MicroLogix 1100 controller to your DH-485 network
directly without using an external optical isolator, such as Advanced Interface
Converter (AIC+), catalog number 1761-NET-AIC, as shown in the
illustrations below, because Channel 0 is isolated within the controller.
We recommend that you use a 1747-UIC USB interface to connect your PC to
a DH-485 network. For more information on the 1747-UIC, see the Universal
Serial Bus to DH-485 Interface Converter Installation Instructions, publication
1747-IN063.
DH-485 Configuration Parameters
When MicroLogix communications are configured for DH-485, the following
parameters can be changed:
See Software Considerations on page 208 for tips on setting the parameters
listed above.
Use a 1763-NC01 Series A or later (8-pin mini-DIN to
6-pin DH-485 connector) cable or equivalent to
connect a MicroLogix 1100 controller to a DH-485
network.
DF1 Full-Duplex Configuration Parameters
Parameter Options
Baud Rate 9600, 19.2 KBps
Node Address 1...31 decimal
Token Hold Factor 1...4
A
TERM
B
COM
SHLD
CHS GND
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