Rockwell Automation 1747-ASB Remote I/O Adapter Module - Manual (Page 3)

Remote I/O Adapter Module 3
Publication 1747-IN014C-EN-P - January 2003
1747-ASB Module Overview
The 1747-ASB module is an SLC 500 single-slot, RIO communication link module. It
occupies the first slot (slot 0) of a 1746 remote chassis, where the SLC processor
normally resides.
The 1747-ASB module is an adapter, or slave, on the RIO link, and the master of the
remote chassis and remote expansion chassis in which it is installed. Remote
expansion chassis are optional. The module acts as a gateway between the scanner
and the I/O modules residing in the remote chassis and remote expansion chassis.
It maps the image of the I/O modules in its remote chassis and remote expansion
chassis directly to the SLC or PLC processor image.
Output data is sent from the scanner of either the SLC or PLC local chassis to the
1747-ASB module across the RIO link. This data is automatically transferred to the
output modules across the chassis backplane by the 1747-ASB module. Inputs from
the input modules are collected via the backplane by the 1747-ASB module and
sent back to the scanner across the RIO link. No user programming of the 1747-ASB
module is necessary.
Supervisory SLC (or PLC)
RIO Link
Outputs to
Modules
Inputs from
Modules
1747-ASB Module
Remote Chassis Remote Expansion Chassis
1747-ASB Module
Remote Chassis
1747-ASB Module
Remote Chassis Remote Expansion Chassis