Allen-Bradley 1788-CN2DN ControlNet to DeviceNet Linking Device – 1788 Linking Devices Series
When a ControlNet backbone loses its bridge to the DeviceNet field layer, entire production lines go dark — sensors stop reporting, drives lose commands, and safety interlocks can trip without warning. Maintenance teams scramble, downtime accumulates, and the root cause often traces back to a single missing or failed linking device. The Allen-Bradley 1788-CN2DN exists precisely to prevent that scenario, serving as the critical communication gateway that keeps your ControlNet supervisory network in seamless dialogue with DeviceNet field devices.
Within the 1788 Linking Devices family, the 1788-CN2DN occupies a specialized position as the dedicated ControlNet-to-DeviceNet bridge — purpose-engineered for Rockwell Automation architectures where ControlNet carries the real-time I/O backbone and DeviceNet connects distributed sensors, actuators, and drives. As industrial facilities worldwide standardize on Integrated Architecture® platforms, this module remains an indispensable component in thousands of active installations across automotive, food & beverage, oil & gas, and discrete manufacturing sectors.
Technical Specifications
- Part Number: 1788-CN2DN
- Series: 1788 Linking Devices
- Manufacturer: Allen-Bradley / Rockwell Automation
- Function: ControlNet to DeviceNet Linking Device (Bridge/Scanner)
- ControlNet Interface: Dual BNC coaxial connectors (redundant media capable)
- DeviceNet Interface: 5-pin open-style connector
- DeviceNet Node Capacity: Up to 63 nodes
- Backplane Communication: Not applicable (standalone DIN-rail mount)
- Configuration Tool: RSNetWorx™ for DeviceNet / RSNetWorx™ for ControlNet
- Power Supply: 24V DC (DeviceNet bus-powered)
- Operating Temperature: 0 °C to 60 °C (32 °F to 140 °F)
- Storage Temperature: -40 °C to 85 °C
- Relative Humidity: 5% to 95% non-condensing
- Mounting: DIN rail (EN 50022 – 35 mm)
- Weight: Approx. 700 g
- Certifications: UL, CE, cUL (verify current listing with Rockwell)
Note: Specifications are based on published Rockwell Automation documentation. Always verify against the official product bulletin before engineering design.
Key Features & Benefits
- Seamless Protocol Translation: Bridges ControlNet scheduled/unscheduled messaging to DeviceNet explicit and I/O messaging without custom programming.
- Redundant ControlNet Media Support: Dual BNC ports allow connection to redundant ControlNet coax segments, maximizing network uptime.
- High Node Density: Supports up to 63 DeviceNet nodes per module, reducing the number of linking devices required in large installations.
- RSNetWorx Integration: Fully configurable via Rockwell’s standard network configuration tools — no proprietary utilities required.
- DIN-Rail Mounting: Compact form factor installs directly in control panels alongside other 1788-series devices.
- Deterministic I/O: Maintains ControlNet’s scheduled, deterministic data transfer for time-critical process control loops.
- Broad Device Compatibility: Works with any DeviceNet-compliant device — drives, sensors, I/O blocks, and safety devices from multiple vendors.
Industry & Equipment Applications
- Automotive Manufacturing: Body-in-white welding lines, paint shop conveyors, and assembly transfer systems using mixed ControlNet/DeviceNet topologies.
- Food & Beverage: Packaging lines, filling machines, and conveyor systems where hygienic DeviceNet sensors report to ControlNet-based PLCs.
- Oil & Gas: Wellhead control panels and pipeline SCADA systems integrating legacy DeviceNet field instruments into modern ControlNet backbones.
- Water & Wastewater: Pump station automation where distributed DeviceNet drives are supervised by ControlNet-connected CompactLogix or ControlLogix controllers.
- Discrete Manufacturing: Machine tool networks, robotic cells, and material handling systems requiring real-time I/O across both network layers.
- Mining & Minerals: Conveyor drive networks and crusher control systems with DeviceNet motor protection relays linked to ControlNet supervisory PLCs.
System Integration & Compatible Parts
The 1788-CN2DN is designed to operate within Rockwell Automation’s Integrated Architecture® ecosystem. Typical companion components include:
- Controllers: ControlLogix (1756 series), CompactLogix (1769 series) with ControlNet scanner modules
- ControlNet Scanner Modules: 1756-CNB, 1756-CNBR (redundant), 1769-CNB
- DeviceNet Scanner Modules: 1756-DNB, 1769-SDN (for comparison/alternative topologies)
- ControlNet Tap & Cable: 1786-series taps, RG-6 coaxial cable, and BNC connectors
- DeviceNet Media: Thick/thin DeviceNet cable, 1485-series connectors and terminators
- Power Supplies: 1606-series or 1794-series 24V DC power for DeviceNet bus
- Configuration Software: RSNetWorx for ControlNet, RSNetWorx for DeviceNet (Studio 5000 Logix Designer ecosystem)
Our Quality Assurance Process
At Konmask.com, every Allen-Bradley 1788-CN2DN unit goes through a rigorous multi-stage verification process before shipment:
- Source Verification: Units are sourced exclusively from authorized distributors, certified resellers, or directly from decommissioned OEM installations with documented provenance.
- Visual Inspection: Each module is inspected for physical damage, corrosion, missing labels, and counterfeit indicators per Rockwell Automation’s anti-counterfeiting guidelines.
- Functional Testing: Where applicable, modules are bench-tested for power-on self-test (POST) completion and basic communication handshake verification.
- Firmware Review: Firmware revision is documented and disclosed to the buyer prior to shipment.
- Secure Packaging: Anti-static packaging with moisture barrier bags and shock-absorbing foam inserts protect units during international transit.
How to Order
- Submit an Inquiry: Contact us via the form on this page or email support@konmask.com with your required quantity and delivery timeline.
- Receive a Quote: Our team will respond within 1 business day with pricing, lead time, and stock availability.
- Confirm & Pay: Approve the proforma invoice and complete payment via T/T (wire transfer), PayPal, or other agreed methods.
- Shipment & Tracking: We ship via DHL, FedEx, or UPS Express with full tracking. Export documentation (commercial invoice, packing list) provided for customs clearance.
- After-Sales Support: Our technical team is available post-delivery to assist with installation questions or warranty claims.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on PLC, DCS, and industrial networking components — not a generalist marketplace.
- Global B2B Supply: Serving engineering firms, system integrators, and MRO teams across Asia, Europe, the Middle East, and the Americas.
- Fast Inquiry Response: Dedicated sales engineers respond to RFQs within 24 hours on business days.
- Transparent Sourcing: We disclose product condition (new, surplus, refurbished) and firmware revision upfront — no surprises.
- Competitive Pricing: Direct relationships with surplus dealers and authorized channels allow us to offer market-competitive pricing on hard-to-find parts.
- Export Expertise: Experienced in international shipping, customs documentation, and compliance for industrial electronics.
Frequently Asked Questions
Q: What is the difference between the 1788-CN2DN and the 1788-CN2DN/A?
A: The suffix “/A” denotes a series revision. Functionally they perform the same ControlNet-to-DeviceNet bridging role; however, later revisions may include firmware improvements or minor hardware changes. Always verify compatibility with your existing network configuration before substituting revisions.
Q: Can the 1788-CN2DN be used with a ControlLogix 1756-CNB module?
A: Yes. The 1788-CN2DN connects to the ControlNet segment managed by the 1756-CNB (or 1756-CNBR for redundant media) and bridges that network to a DeviceNet segment. It is a standard node on the ControlNet network from the scanner’s perspective.
Q: Do you supply new or surplus units?
A: We supply both new-in-box and tested surplus units depending on availability. Product condition is always disclosed in the quotation. Contact us to confirm current stock status.
Q: What firmware version will I receive?
A: Firmware revision is documented during our inspection process and disclosed prior to shipment. If you require a specific firmware version, please state this in your inquiry.
Q: Can you provide a certificate of conformance or test report?
A: Yes, we can provide a certificate of conformance and inspection report upon request. Please specify this requirement when submitting your inquiry.
Q: What is the lead time for the 1788-CN2DN?
A: Lead time depends on current stock levels. In-stock units typically ship within 2–3 business days. For out-of-stock items, lead time is quoted individually. Submit an inquiry for real-time availability.
Q: Is the 1788-CN2DN compatible with Studio 5000 / RSLogix 5000?
A: The 1788-CN2DN is configured using RSNetWorx for ControlNet and RSNetWorx for DeviceNet, not directly within Studio 5000. However, it integrates fully into Logix-based control systems managed through Studio 5000.
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