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ControlLogix ControlNet Module 1756-CNB (discontinued)
| Rockwell lifecycle status | Discontinued 31/12/2024 (read on 25 September 2026) |
|---|---|
| Replacement | 1756-CN2 — named by Rockwell Automation |
Rockwell names 1756-CN2 as the replacement (Engineering Replacement), with 128 Logix connections versus 40…48 on the 1756-CNB.
Key data
| Network | ControlNet 5 Mbps |
|---|---|
| Logix connections | 40…48 |
| Max connections | 64 |
| Max nodes | 99 |
| Ports | 1 × BNC ControlNet + 1 × NAP RJ45 |
| Current draw | 970 mA @ 5.1 V DC |
| Replacement category | Engineering Replacement |
| Migration path | 1756-CN2 (128 Logix connections) |
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 services: Lifecycle review and spare parts Rockwell Automation upgrades ControlLogix in TDL Projects
Other catalog numbers in this family: Legacy ControlLogix (1756)
1756-ENBT 1756-IF6I 1756-IT6I 1756-IR6I 1756-OF6CI 1756-L61 1756-L62 1756-L63 1756-L64 1756-L65 1756-CNBR 1756-DHRIO 1756-RIO
Sources
- Rockwell Automation, Rockwell product page 1756-CNB — read on 25 September 2026
- Rockwell Automation, 1756-TD003R — p. 27–28
- Rockwell Automation, rockwellautomation.com product page