Rockwell Automation PLC-5 Fieldbus Solutions for Integrated Architecture User Manual - Manual (Page 85)

Publication 1757-UM006A-EN-P - May 2002
1757-FIM Planning Considerations 3-3
FIM and I/O module allowance
Be sure your ProcessLogix System Fieldbus and I/O requirements do
not exceed the capacities listed in the following table. In terms of
processing allocations, the FIM is the equivalent of three I/O modules.
Fieldbus network references
Please refer to the following publications for guidance in designing
and implementing the fieldbus network to be interfaced to the
ProcessLogix system through the FIM and its companion Remote
Termination Panel (RTP).
Table 3.B
Component Total Per Controller Total Per Server
Maximum number of FIMs
plus I/O modules divided by
three (including local and
remote chassis I/O and rail
I/O). 21 100
Maximum number of H1
links (independent LAS) 42 200
Maximum number of
fieldbus devices
(1)
(1) Each H1 link is capable of supporting (a practical limit) at least 16 fieldbus devices. This number may vary
depending on the dynamics of the link.
672 3,000
Table 3.C
Publication Number/Title Scope Source
AG-140 / Wiring and
Installation 31.25 kbit/s,
Voltage Mode, Wire
Medium Application Guide Overview of what you need
to know to wire, power, and
layout network components Fieldbus Foundation
9390 Research Blvd.
Suite II-250
Austin Texas 78759-9780
www.fieldbus.org
AG-165 / Fieldbus
Installation and Planning
Guide Outlines things to consider
before installing a fieldbus
network Fieldbus Foundation
9390 Research Blvd.
Suite II-250
Austin Texas 78759-9780
www.fieldbus.org
Relcom Inc. Provides fieldbus wiring
products, wiring design and
installation data.
Offer a free Fieldbus Wiring
Design and Installation
Guide you can download. Visit the Relcom Inc.
website
www.relcominc.com