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1756-CN2R – ControlLogix redundant ControlNet module
1756-CN2R is a current Allen-Bradley ControlLogix redundant ControlNet module (Rockwell lifecycle status: Active Mature, read on 30 October 2026). It replaces 1 discontinued catalog number in TDL's end-of-life lookup. TDL quotes 1756-CN2R as a spare or as part of a replacement, and carries out the change on site: configuration, program changes where needed, and testing.
| Catalog number | 1756-CN2R |
|---|---|
| Rockwell description | ControlNet Redundant Interface Module (100 connections) |
| Rockwell lifecycle status | Active Mature — still sold and fully supported; Rockwell has a newer product family (read on 30 October 2026) |
| Product family | ControlLogix redundant ControlNet module |
| Rockwell technical documents | 1756-SG001, 1756-IN607, 1756-TD003 |
Discontinued parts this catalog number replaces
| Discontinued part | Product | Lifecycle | Basis |
|---|---|---|---|
| 1756-CNBR | ControlLogix ControlNet Module, Redundant Media 1756-CNBR (discontinued) | Discontinued 31/12/2024 | named by Rockwell |
Migration notes
- Rockwell names 1756-CN2R as the replacement (Engineering Replacement), with 128 Logix connections.
- ControlLogix 5560 controllers (1756-L61…L65) were discontinued on 01/06/2017; the product pages list Functional Replacement but name no catalog number, so the ControlLogix 5580 numbers in the table are TDL proposals sized by memory. The 1756-CNB/CNBR ControlNet modules have Rockwell-named replacements (1756-CN2/CN2R); for the 1756-DHRIO and 1756-RIO the Rockwell pages name no replacement.
Lifecycle status changes over time: confirm the current status on the Rockwell product page or in the Product Compatibility and Download Center before ordering.
Related technical articles
Related services: Lifecycle review and spare parts Rockwell Automation upgrades ControlLogix in TDL Projects
Sources
- Rockwell Automation, Rockwell product page 1756-CN2R — read on 30 October 2026
- TDL, End-of-life lookup: 1756-CNBR