Rockwell Automation 1791 IOBX, IOVX Block I/O User Manual

The 1791 IOBX and 1791 IOVX are small, self-contained remote I/O devices that include a power supply, programmable controller interface, input/output connections, and signal conditioning circuitry. They are compatible with PLC-2, PLC-3, and PLC-5 family programmable controllers, and the SLC 500 modular controllers. These devices are designed for use in a variety of industrial applications.

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Rockwell Automation 1791 IOBX & IOVX User Manual | Manualzz

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Key features

  • Self-contained remote I/O
  • Includes power supply
  • Programmable controller interface
  • Input/output connections
  • Signal conditioning circuitry
  • Compatible with PLC-2, PLC-3, PLC-5, and SLC 500 controllers
  • Removable terminal blocks for easy wiring
  • Configuration switches for baud rate, last state, PRL, last rack, and I/O group
  • Rack address switch for selecting the system rack address
  • Status indicators for power, active, communication, and fuse blown

Frequently asked questions

The 1791-IOBX has 64 sinking inputs and 64 sourcing outputs, while the 1791-IOVX has 64 sourcing inputs and 64 sinking outputs.

The number of blocks used depends on the system configuration and user requirements. Older configurations can use up to 16 blocks, while newer configurations with 82 ohm terminators can support up to 32 blocks.

An external 24V dc (+10/-25%) power supply with current limiting capabilities is required. The voltage range must not exceed 18.0-26.4V dc. The total current required to power the block is 300mA.

Refer to the manual for the 1747-SN Remote I/O Scanner Module for instructions on configuring the block I/O when used with SLC 500 processors. For use with PLC family controllers, you can configure the block I/O by setting the configuration switches.
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