PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1791-IOVW is a 24V DC I/O Module from the Block I/O 1791 series. This block unit provides 32 sourcing inputs and 32 sinking outputs in a single integrated enclosure. It combines adapter circuitry, power supply components, and I/O rack functions into a complete remote assembly. Front-panel LED indicators display operational status for Fuse, Active, Communication, Power, and individual points.
Field wiring connects using two 37-pin removable terminal blocks with left-side inputs and right-side outputs. External supply connections require 18 to 26.4V DC to power the internal circuitry and outputs. Onboard DIP switches allow field selection of rack address, baud rate, and processor restart lockout. The module operates between 0 and 60 degrees Celsius with a maximum power dissipation of 15.1 Watts.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| External Power | 18-26.4V DC |
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| Input Off-state Current | 1mA DC max. |
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| Input Off-state Voltage | 7V DC max. |
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| Input On-state Current | 1.56mA min. |
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| Input On-state Voltage Range | 12-26.4V DC |
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| Inputs per Block | 32 Sourcing |
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| Output Voltage Range | 18-26.4V DC at 300mA resistive max. |
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| Outputs per Block | 32 Sinking |
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| Product Lifecycle Status* | Discontinued/Obsolete |
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| UPC | 10612598121110 |
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| Voltage | 24V DC |
|---|
| Weight | 2.00 lbs (0.91 kg) |
|---|
TECHNICAL INFORMATION
Features
- Integrates 32 sourcing inputs and 32 sinking outputs within one complete block housing.
- Combines remote adapter, internal power supply, and I/O termination in a single unit.
- Features status LEDs for Fuse, Active, Communication, Power, and I/O point states.
- Provides dual removable 37-pin terminal blocks to simplify field wiring maintenance.
- Includes configuration switches for rack addressing, baud rate, last state, and lockout modes.
- Dissipates a maximum thermal load of 51.8 BTU per hour during active operation.
TECHNICAL INFORMATION
Applications
- Remote digital control stations requiring high-density 24V DC discrete sensor inputs.
- Actuator and solenoid driving through 32 dedicated sinking output channels.
- Distributed industrial machinery communicating via standard Allen-Bradley remote I/O links.
TECHNICAL INFORMATION
Connections / Interfaces
- Two 37-pin removable terminal blocks handle discrete input and output wiring connections.
- Connect all input wiring to the left-side terminals.
- Connect all output wiring to the right-side terminals.
- A dedicated terminal block accepts incoming 18 to 26.4V DC external power.
- Remote I/O communications connect using Belden 9463 cable wired strictly in series.
TECHNICAL INFORMATION
Installation Guidelines
- Use 14 AWG stranded wire for field wiring terminations on the module.
- Install terminating resistors at both physical ends of the remote I/O communication link.
- Maintain ambient operating temperatures between 0 and 60 degrees Celsius.
- Do not wire remote I/O communication blocks in parallel configurations.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure communication baud rate and rack address using the onboard switches.
- Set the last rack, last state, and processor restart lockout DIP switches before powering on.
TECHNICAL INFORMATION
Compatibility
- Communicates over Allen-Bradley remote I/O networks using Belden 9463 cable.
- This module is not compatible with the 1747-DSN distributed I/O scanner module.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The 1791-IOVW module is discontinued and carries obsolete lifecycle status from Rockwell Automation.
- Replacement units must be sourced through specialized automation inventory suppliers.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCommunicates over Allen-Bradley remote I/O networks using Belden 9463 cable. This module is not compatible with the 1747-DSN distributed I/O scanner module.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What I/O configuration does the Allen-Bradley 1791-IOVW provide?
The 1791-IOVW features 32 sourcing inputs and 32 sinking outputs operating at 24V DC.
Which communication cable is specified for the 1791-IOVW remote link?
Use Belden 9463 cable wired in series with terminating resistors installed at link ends.
Is the 1791-IOVW compatible with the 1747-DSN scanner module?
No, the 1791-IOVW is not compatible with the 1747-DSN distributed I/O scanner module.
What wire gauge should be used for 1791-IOVW field connections?
Field wiring requires 14 AWG stranded wire connected to the dual 37-pin removable terminal blocks.
