Publication 1762-UM001D-EN-P - March 2004
E-6 Connecting 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
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
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