PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1791-IOVX Block I/O 1791 I/O Module delivers distributed digital interfacing for industrial automation systems. This self-contained device combines input circuits, output circuits, a power supply, and programmable controller interface circuitry. It provides 64 sourcing inputs alongside 64 sinking outputs across dedicated connection terminals. The design merges the operational functions of an I/O module, rack, and remote adapter into one chassis.
Operating on an external 24V DC supply, the hardware supports voltage levels from 18 to 26.4V DC. The unit includes four removable 37-pin terminal blocks for wiring field connections. An additional non-removable terminal block connects the module directly to external 24V DC power. Diagnostics include indicators for Power, Active status, Fuse state, and Remote I/O communication signals.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| EAN | 4943823111231 |
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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 | 64 Sourcing |
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| Output Voltage Range | 18-26.4V DC at 300mA resistive max. |
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| Outputs per Block | 64 Sinking |
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| Product Lifecycle Status* | Discontinued/Obsolete |
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| Voltage | 24V DC |
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| Weight | 2.50 lbs (1.13 kg) |
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TECHNICAL INFORMATION
Features
- Combines 64 sourcing inputs and 64 sinking outputs in one unit.
- Provides self-contained I/O rack, remote adapter, and power supply functions.
- Equipped with four removable 37-pin terminal blocks for field connections.
- Features onboard push buttons to toggle LED display status for inputs and outputs.
- Contains configuration switches for rack address, baud rate, and last state settings.
- Supports Remote I/O link connections using Belden 9463 cable.
TECHNICAL INFORMATION
Connections / Interfaces
- Four removable 37-pin terminal blocks interface with field input and output wiring.
- One non-removable terminal block receives the external 24V DC power feed.
- Belden 9463 cable interfaces with the remote communication link.
TECHNICAL INFORMATION
Installation Guidelines
- Connect field wiring using 14 AWG stranded wire with maximum 1.2 millimeter insulation thickness.
- Wire output conductors to the right-side terminals and input conductors to the left-side terminals.
- Connect module blocks strictly in series along the communication link.
- Never wire communication blocks in parallel configurations.
- Install a termination resistor if this block serves as the final device on the link.
TECHNICAL INFORMATION
Configuration Guidelines
- Use onboard switches to select I/O group assignments and rack addresses.
- Configure communication baud rate and last rack status using the DIP switches.
- Set last state behavior and process restart lockout through dedicated configuration switches.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The Allen-Bradley 1791-IOVX is marked discontinued and obsolete by the manufacturer.
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 is the primary function of the Allen-Bradley 1791-IOVX?
The 1791-IOVX provides 64 sourcing inputs and 64 sinking outputs on a 24V DC Remote I/O link.
How are field input and output wires oriented on the terminal blocks?
Connect output wires to right-side terminals and input wires to left-side terminals.
What wiring is required for the remote communication link?
Use Belden 9463 cable wired in series, terminating the last module with a resistor.
What is the commercial pricing for the Allen-Bradley 1791-IOVX?
Market pricing figures are indicative reference values only and do not represent a final quotation.
