1788-CN2DN Allen Bradley ControlNet Linking Module Specification

Product Overview

The 1788-CN2DN 1788 Linking Devices module serves as a high-performance industrial bridge. It connects ControlNet networks with DeviceNet architectures seamlessly. Engineers deploy this hardware to facilitate data exchange across distributed control systems. The 1788-CN2DN unit supports both configuration monitoring and closed-loop control tasks.

Global PLC Spare HUB's Insight: In high-speed packaging lines, linking disparate controller networks often creates bottlenecks. Using the 1788-CN2DN 1788 Linking Devices unit eliminates data translation lag between legacy PLC-5 racks and modern DeviceNet drives.

Technical Specifications

Installation & Wiring Guide

• Mounting Requirements
  • Secure the module to a 35 mm steel DIN rail or panel surface.
  • Ensure surrounding air temperature does not exceed 60° C.
• Power Connection Standards
  • Use solid or stranded copper wire sized 0.25 to 2.5 mm² (22 to 14 AWG).
  • Apply a minimum insulation rating of 75° C (167° F).
• Network Cabling Standards
  • Connect ControlNet via RG6 cable and designated taps.
  • Utilize 20 AWG 1485C-P1-Cxxx cable for DeviceNet lines.

Commissioning & Maintenance

• Rotary Switch Configuration
  • Set node addresses using the dual 10-position rotary switches.
  • Configure data rates accurately prior to powering the unit.
• Diagnostic Indicator Monitoring
  • Module Status: Verifies internal hardware health.
  • Linking Activity: Confirms active bridge data transfer.
  • DNet Network Status: Detects bus-off conditions.
  • CNet Status Channels: Validates redundant media channels A and B.

System Compatibility

• Controller Integration
  • Allen Bradley PLC-5 processors
  • SLC 500 controllers
  • ControlLogix and CompactLogix systems
• I/O and Peripheral Devices
  • POINT I/O and Flex I/O adapters
  • Bulletin 160 drives
  • Series 9000 Photoeyes and 855T Stack lights

Logistics & Warranty Terms

• Packaging List
  • One (1) 1788-CN2DN linking device unit
  • One (1) power input connector
  • One (1) DeviceNet 10-pin linear connector
  • Five (5) 121 Ω resistors and two (2) end anchors
• Shipping Details
  • Carrier Options: FedEx, UPS, DHL
  • Dispatch Window: 24 to 48 hours from order confirmation
• Warranty Coverage
  • Standard 12-month warranty included for all supplied units.

Typical Application Scenarios

• Automotive Assembly Plants: Linking plant-floor sensor networks to central automation controllers.
• Material Handling Systems: Managing high-density conveyor sorting drop zones.
• Process Control Skids: Interfacing remote valve islands with supervisory control networks.

Frequently Asked Questions

What causes a flashing red Module Status indicator on the 1788-CN2DN unit?

A flashing red indicator typically points to a recoverable configuration fault or a minor hardware mismatch during startup. Field experience shows that verifying rotary switch node assignments and rebooting power usually clears this fault code.

Can I replace a damaged 1788-CN2DN module without reconfiguring the network?

Yes, because network configuration parameters reside primarily within the connected master controller rather than the bridge hardware. Matching the physical rotary switch address settings to the original unit ensures immediate operational restoration.

What cable specification prevents signal degradation on long DeviceNet runs?

Deploying standard 20 AWG 1485C-P1-Cxxx cable with proper termination resistors at both ends maintains signal integrity. Avoid routing communication cables parallel to high-voltage power lines to prevent induced electrical noise.

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