1771-SDN/C manual

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Rockwell automation :Allen-Bradley

Allen-Bradley is the brand-name of a line of factory automation equipment, today owned by Rockwell Automation. The company, with revenues of approximately US $6.4 billion in 2013, manufactures programmable logic controllers (PLC), human-machine interfaces, sensors, safety components and systems, software, drives and drive systems, contactors, motor control centers, and systems of such products.

Product detail

Depending on the configuration of your application, you can use one of the following devices to make additional POINTBus backplane current or field power current available:

• 1734-EP24DC POINT I/O Expansion Power Supply - An expansion power supply is installed between embedded I/O modules and local expansion modules or between local expansion modules.

The expansion power supply breaks the available POINTBus backplane current between the modules to its left and right. With the expansion power supply installed, the modules to its left can draw up to 1 A of POINTBus backplane current. The modules to the right of the expansion power supply can draw as much current as the current provided by the expansion power supply.

Additionally, the expansion power supply breaks the available field power current between the modules to its left and right. With the expansion power supply installed, the modules to its left can draw up to 3 A of field power current. The modules to the right of the expansion power supply can draw as much field power current as allowed by the expansion power supply.

• 1734-FPD POINT I/O Field Power Distributor Module - A field power distributor module can also be installed between embedded I/O modules and local expansion modules or between local expansion modules.

The field power distributor module breaks the available field power current between the modules to its left and right. With the field power distributor module installed, the modules to its left can draw up 3 A of field power current. The modules to the right of the field power distributor can draw as much field power current as allowed by the field power distributor.

The specific configuration parameters for a system determine the impact on actual RPI rates. These configuration factors can impact the effective scan frequency for any individual module: • Rates at which the RPI rates of other 1734 POINT I/O module are set

• Number of other 1734 POINT I/O modules in the system

• Types of other 1734 POINT I/O modules in the system

• Application user task priorities

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