Rockwell Automation 1762-Lxxxx MicroLogix 1200 Programmable Controllers - Manual (Page 136)

Publication 1762-UM001G-EN-P - March 2011
E-6 Connect to Networks via RS-232 Interface
NA = Not Applicable
Important DH-485 Network Planning Considerations
Carefully plan your network configuration before installing any hardware.
Listed below are some of the factors that can affect system performance:
• amount of electrical noise, temperature, and humidity in the network
environment
• number of devices on the network
• connection and grounding quality in installation
• amount of communication traffic on the network
• type of process being controlled
• network configuration
The major hardware and software issues you need to resolve before installing a
network are discussed in the following sections.
Hardware Considerations
You need to decide the length of the communication cable, where you route it,
and how to protect it from the environment where it will be installed.
When the communication cable is installed, you need to know how many
devices are to be connected during installation and how many devices will be
added in the future. The following sections help you understand and plan the
network.
1747-DTAM,
2707-L8P1,
-L8P2, -L40P1,
-L40P2,
-V40P1,
-V40P2,
-V40P2N,
-M232P3, and
-M485P3 DTAM, DTAM
Plus, and DTAM
Micro Operator
Interfaces Panel Mount Provides electronic operator interface for SLC 500 processors. 1747-6.1
2707-800,
2707-803
2711-K5A2,
-B5A2, -K5A5,
-B5A5, -K5A1,
-B5A1, -K9A2,
-T9A2, -K9A5,
-T9A5, -K9A1,
and -T9A1 PanelView 550 and
PanelView 900
Operator Terminals Panel Mount Provides electronic operator interface for SLC 500 processors. 2711-UM014
Table E.1 Allen-Bradley Devices that Support DH-485 Communication
Catalog
Number Description Installation Function Publication