Four selectable analog inputs and two voltage outputs in one Allen-Bradley Remote I/O block.
Allen-Bradley 1791-N4V2 is a 1791 Block I/O analog module with four selectable inputs and two voltage outputs. Rockwell Automation documents 14-bit input and output resolution, voltage and current input ranges, a 108 ms update for all four inputs and a 10 ms internal update per output channel. The block operates on a Remote I/O link and requires its documented AC supply and wiring arrangement. Procurement should verify the complete catalogue number, selected signal ranges, scaling, output loads, external loop power, Remote I/O communication, terminal wiring, environmental limits and installed controller configuration before replacement.
| Product Condition | Original new |
|---|---|
| Availability | In stock |
| Warranty | With 1 year warranty |
| Shipping | Worldwide shipping options available |
Condition, availability and warranty are Stockoems commercial information, not manufacturer commitments.
| Manufacturer | Allen-Bradley / Rockwell Automation |
|---|---|
| Complete Part Number | 1791-N4V2 |
| Product Type | 1791 Block I/O analog module |
| Analog Inputs | 4 selectable |
| Input Ranges | ±10 V, ±5 V, 0–10 V, 0–5 V, ±20 mA or 0–20 mA |
| Input Resolution | 14 bit |
| Input Update | 108 ms for all 4 channels |
| Input Impedance | 10 MΩ voltage; 249 Ω current |
| Analog Outputs | 2 voltage outputs |
| Output Range | ±10 V |
| Output Resolution | 14 bit |
| Output Update | 10 ms per channel |
| Output Load | ±10.00 V into 1 kΩ or larger |
| Loop Power | 20–28 V DC, 100 mA |
| External Supply | 85–132 V AC, 47–63 Hz, 150 mA |
| Communication | Allen-Bradley Remote I/O link |
| Operating Temperature | 0 to 60 °C |
| Dimensions | 176.5 × 68.8 × 98 mm |
| Application | Engineering Relevance |
|---|---|
| Remote analog acquisition | Collects four selectable voltage or current signals through a verified Remote I/O installation. |
| Analog command output | Provides two ±10 V outputs for compatible loads and documented field circuits. |
| Legacy machine maintenance | Supports exact-spare review where the controller, rackless block and field wiring must be preserved. |
| Process signal retrofit | Useful only after ranges, scaling, isolation, power and communication are validated. |
The reviewed Rockwell Automation product data and installation instructions confirm the exact catalogue number and technical specifications but do not provide a current lifecycle classification for 1791-N4V2. No Active, Discontinued or other lifecycle label is assigned here. Procurement should verify current support and replacement planning separately while preserving the exact catalogue number, Remote I/O architecture, AC supply, signal ranges and wiring.
It identifies an Allen-Bradley 1791 Block I/O analog module with four selectable inputs and two voltage outputs.
The official technical documents reviewed do not provide a current lifecycle label, so this page does not classify the block as Active or Discontinued.
The four inputs support documented voltage and current ranges including bipolar and unipolar selections.
The module provides two 14-bit voltage outputs with a documented ±10 V range.
Verify Remote I/O addressing, signal ranges, scaling, terminal wiring, AC supply, external loop power and controller configuration.
Yes. Available evidence can include the complete block, readable catalogue label, terminals, connectors and packaging condition.
Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
A documented route from model verification to after-sales response.
Model and suffix verification, product and label photo confirmation, and condition confirmation before quotation.
Technical compatibility review covering interfaces, power, connectors, hardware revision and installed-system context.
Visual inspection, label checking and available functional evidence are organized for buyer review.
Protective packaging is selected for the housing, connectors and accessories before dispatch.
Worldwide shipping, shipment tracking and customs documentation are coordinated without unverified delivery promises.
Written warranty terms, a return authorization process and after-sales response support accountable communication.
| Quality inspection | Visible condition, label details and included items are checked against the agreed scope. |
|---|---|
| Label verification | The complete part number, suffix and available revision markings are compared before dispatch. |
| Packaging handling | Connectors and housings receive protective packing appropriate to international transport. |
| Documentation | Commercial and customs documents are prepared for the agreed shipment arrangement. |
| After-sales communication | Questions are handled with the order record, inspection evidence and written terms available for review. |
Check whether the supplier preserves complete part numbers, provides traceable photographs, explains commercial terms in writing and asks for installed-system details before claiming compatibility.
Request clear product, nameplate, connector, seal, accessory and packaging photos together with written condition, warranty and shipping terms.
Watch for shortened model numbers, copied specifications, unclear condition, unverifiable inventory quantities, guaranteed compatibility without engineering review and pressure to accept undocumented substitutes.
Compare the complete suffix, hardware revision, electrical ratings, interfaces, connectors, software requirements, project configuration, mounting and official migration guidance.
Share the complete part number, quantity, destination and clear label photos for a focused availability and compatibility review.
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