Configuration Manual Owner manual

Publication 1757-PM002A-EN-E - June 2006
Set Up A System 2-9
• Additional current consumption due to one spur short-circuit fault
(10ma)
The length of a fieldbus wiring system and the number of devices on a
network/segment are limited by the power distribution, attenuation, and signal
distortion. Refer to ISA 50.02 for the limitations on cable length.
Fieldbus Network Topologies
A network topology refers to the shape and design of a fieldbus network.
There are basically three types of network topologies supported: tree; bus with
spurs; and daisy chain. The daisy chain network, however, is not
recommended.
The two port linking device shown below in Figure 2.3 is an example of a
simple fieldbus network on each H1 port. Notice that there are two
terminators and one power conditioner per fieldbus segment. The terminators
should be placed at the ends of the trunk.
IMPORTANT
You can use a maximum of two terminators per bus
segment.