YOKOGAWA F3LR02-0N, User Manual

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A3-1
IM 34M06H45-01E 7th Edition : Aug.30, 2019-00
A3. System Configuration
A3.1 Fiber-optic FA-bus System Configuration
In a Fiber-optic FA-bus system configuration, FA-bus modules are installed in main unit
and subunits, and then connected using fiber-optic cables.
Main unit : Unit with CPU module installed
Subunits : Units used for main unit system extension
(with no CPU module installed)
A3.1.1 Restrictions on System Configuration
The following table lists some restrictions when configuring a Fiber-optic FA-bus system.
Table A3.1 Restrictions when Configuring a Fiber-optic FA-bus System
Item Specifications
Maximum total distance per system 200 m
Number of connectable subunits 7 max.*
Number of Fiber-optic FA-bus
modules installable in a main unit
7 max.*
Number of Fiber-optic FA-bus
modules installable in a subunit
1 max
Modules installable in a subunit
All I/O modules and special modules except for
- Ethernet interface modules,
- NX Interface modules,
- FL-net Interface modules,
- FA Link modules,
- FA Link H modules,
- FA Link H2 modules,
- Fiber-optic FA Link H modules,
- Hard Disk modules, and
- PC Card modules
Unit number setting
(rotary switch located on the front of
the module)
Main unit: 0
Subunits: 1 to 7* (no duplicates allowed)
*: Up to 6 subunits are allowed if F3SP20 or F3SP30 module is used.
A3.1.2 Connection Topology
Fiber-optic FA-bus modules can only be connected using a star topology.

Star Configuration
*: 6 max. when using F3SP20 or F3SP30
FA0311.VSD
Unit 1
Unit 2 Unit 3
Unit 0
Main unit
Subunits (7 max.*)