Allen-Bradley 1734-APB POINT I/O PROFIBUS Adapter Module

Allen-Bradley 1734-APB POINT I/O PROFIBUS Adapter Module

Description

The POINT I/O 1734-APB adapter resides on the PROFIBUS network and the POINT I/O backplane (PointBus) simultaneously. From this position, the adapter interfaces between the PROFIBUS network and the POINT I/O modules.

The adapter functions are:

• PROFIBUS - adapter serves as a slave that exchanges I/O data with a PROFIBUS master.

• PointBus - the adapter serves as a master that communicates with up to 63 POINT I/O modules.

Communicating through the Adapter：

Output data is sent from the master across the PROFIBUS network to the 1734-APB adapter. The adapter automatically transfers the data across the PointBus backplane to the output modules.

Inputs from the input modules are collected by the PROFIBUS adapter via the backplane and sent across the PROFIBUS network to the master.

I/O Module Removal and Insertion Under Power：

I/O modules can be removed under power from their positions in the backplane without interfering with the communication with the other modules. When reinserting the removed module, communication is automatically started up again if the following criteria is fulfilled:

1. The inserted module is the same type as the one removed.

2. If more than one module is removed, communication will not be regained until all modules are inserted in their correct positions again.

Starting the adapter module consists of:

• Installing the adapter in the system
• setting the adapter node address
• configuring the adapter for PROFIBUS communication
• configuring the I/O modules for PointBus communication

Technical Specifications