Rockwell Automation 1747-SN Remote I/O Scanner - Manual (Page 10)

Publication 1747-UM013B-EN-P - January 2005
1-2 Overview
The scanner can be configured for and transfer a maximum of 4
logical racks of discrete data on the RIO link. The scanner provides
discrete I/O and block (Series B or later) transfers. Configurations
allowed are any combination of quarter, half, three-quarter, or full
logical rack devices.
The SLC processor transfers the scanner’s 4 logical racks (32 input
image and 32 output image words) of discrete remote I/O image data
into the SLC input and output image files. You can adjust the size of
the scanner input and output image file during configuration of your
SLC system so that the scanner only transfers the discrete I/O data
The scanner transfers input and
output data between itself and all
configured network devices over
twisted pair cable. Note that the
end-to-end length of the cable can be
a maximum of 3,048 meters (10,000
feet).
Dataliner Message Display
(Adapter/Slave)
PanelView Operator Terminal
(Adapter/Slave)
SLC 5/02
or Later
Processor
Remote Chassis
Remote Expansion Chassis
1747-ASB Module
(Adapter/Slave)
RediPANEL
(Adapter/Slave)
Local SLC Chassis
RIO Scanner
(Master of the
RIO Link)
The scanner transfers discrete input and output data
between itself, remote adapters, and the SLC processor.
.
Remote adapters consist of 1746 chassis and other
Allen-Bradley operator interface and control devices.
RIO
Scanner SLC 5/02
or Later
Processor
Quarter Logical
Rack
Device Half
Logical Rack
Device Three-Quarter
Logical Rack
Device Full
Logical Rack
Device Half Logical
Rack
Device Full
Logical Rack
Device
Adapter 1 Adapter 2
Adapter 3 Adapter 4 Adapter 5 Adapter 6