FANUC Robotics America GFK-1535A - Manual (Page 8)

1-4 VersaMax™ System Genius® Network Interface Unit User's Manual – November 2000 GFK-1535A
1
The VersaMax Genius I/O Station
A VersaMax PLC consists of a group of VersaMax modules with a VersaMax CPU
and attached power supply in the first position.
Genius NIU
power supply
VersaMax Modules
An I/O Station provides up to 64 analog channels and up to 1024 discrete points for
256 total bytes of I/O. The NIU operates as a device on a Genius bus, automatically
exchanging I/O, diagnostic, and control data with a PLC or host computer.
VersaMax I/O in a Genius System
An I/O station can be used on the same bus as Genius I/O blocks, Field Control I/O
stations, and Remote I/O drops.
Series 90-30 PLC with
bus controller module
Genius Bus
PCIM
Genius I/O Blocks
Series 90-70 Remote I/O Drop
Host Computer
Field Control™ I/O Station
VersaMax™ I/O Stations
NIU
NIU
NIU
Series 90-30 PLC with
communications module
VersaMax I/O stations can be used in redundant bus and redundant CPU
applications. The Genius NIU provides built-in bus-switching capability. See
chapter 6 for more information about using the NIU in a redundancy system.