Rockwell Automation 1747-BSN Backup Scanner Module - Manual (Page 16)

Publication 1747-UM010B-EN-P - September 2003
1-2 Overview
remotely located (3,048 meters [10,000 feet] maximum) 1746 I/O
chassis and other RIO-compatible Allen-Bradley operator interface
and control devices. The 1747-SN scanner communicates with
remotely located devices using the A-B Remote I/O link. The RIO link
consists of a single master (scanner) and multiple slaves (adapters).
Communication between devices occurs over twinax cable with the
devices daisy-chained together. The scanner can reside in any slot of
the local SLC chassis except for slot 0. The 1747-BSN includes the
same functionality as the 1747-SN scanner, but adds the backup
features.
The backup scanner can be configured for and transfer a maximum of
4 logical racks of discrete data on the RIO link. The backup scanner
provides discrete I/O and block transfers. Configurations allowed are
any combination of quarter, half, three quarter, or full logical rack
devices.
SLC 5/02 or
later Processor RIO Scanner
(Master of the RIO LInk)
The scanner transfers input and output data
between itself and all configured network devices
over twinax cable. Note that the end-to-end length
of the cable can be a maximum of 3,048 meters
(10,000 feet)
1747-ASB Module
(Adapter/Slave)
Remote Expansion Chassis
Dataliner Message Display
(Adapter/Slave) PanelView-Operator Terminal
(Adapter/Slave) RediPANEL-
(Adapter/Slave)
Local SLC Chassis Remote Chassis