Allen Bradley AB 1747-ASB Remote Input and Output Adapter Module New 1747-ASB
1747-ASB
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
Determining System Power Requirements Review the power requirements of your system to ensure that the chassis supports placement of the 1747-ASB module. The adapter consumes 600 mA at 5V dc. For a detailed list of device load currents, refer to the SLC 500 Fixed Hardware Style Installation and Operation Manual, publication number 1747-6.21; the SLC 500 Modular Hardware Style User Manual, publication number 1747-UM011, or the appropriate Technical Data sheet.
Due to SLC and PLC addressing differences, when the 1747-ASB module is used with an SLC processor, the image bit numbers are 0 to 7, 8 to 15 decimal. When the 1747-ASB module is used with a PLC processor, the image bit numbers are 0 to 7, 10 to 17 octal.
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