
Advant
®
Smart Device (HART
®
) Interface User’s Guide
Chapter 2 Installation
2-10 3BUR 001 085R0001 REV A
The maximum length of the RS-485 bus is 1200 meters (3,937 feet) and the shortest possible
drop (stub) length is 1 meter (3.3 feet).
Figure 2-7. RS-485 Typical 2-Wire Connection Diagram
RS-232/485 Converter
8
9
8
9
SHIM - XTB1 SHIM - XTB1
DATA+
DATA-
1200 meters maximum
1 meter minimum
8
9
DATA+
DATA-
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