Selecting A Baud Rate - Emerson PACSystems VersaMax User Manual

PACSystems VersaMax Genius Network Interface User Manual
GFK-1535D
2.9.1

Selecting a Baud Rate

All devices on a bus must use the same baud rate.
•
If the cable length is between 4500 and 7500 feet, you must select
•
38.4 Kbaud. This data rate only supports a maximum of 16 devices on
the bus.
If the cable length is between 3500 and 4500 feet, select 76.8 Kbaud.
•
If cable length is between 2000 and 3500 feet, select 153.6 Kbaud
•
extended.
If the cable length is less than 2000 feet, either 153.6 Kbaud standard
•
or 153.6 Kbaud extended can be used. 153.6 Kbaud extended is
recommended, especially if the system will include a dual bus. In
noisy environments, 153.6 Kbaud extended provides improved noise
immunity with little effect on bus scan time.
The selection of an appropriate baud rate for the system may also be
•
determined by the type of cable used. For more information, see
Selecting a Cable Type.
Installation
Section 2
Jan 2023
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