OVERVIEW

Official designation: Allen-Bradley 1788-CNCR (1788 Linking Devices, Redundant Coax ControlNet Card)

Role/Application: This communication daughtercard integrates FlexLogix/DriveLogix controllers into ControlNet networks. It supports 5 Mbps redundant or linear coax architectures, allowing up to 32 connections for I/O control and bridging.

KEY SPECS SUMMARY

Power: 5V DC @ 475 mA maximum via backplane

Interfaces / Ports: Two BNC ControlNet ports, one RJ45 NAP

Indicators: I/O, Module, and Network status LEDs

Operating Temp: 0 degrees C to 60 degrees C

Platform / Compatibility: FlexLogix/DriveLogix controllers, ControlNet 5 Mbps

Limit: Isolation voltage is rated up to 500 Volts DC

Lifecycle: Discontinued by manufacturer, replacement is N/A

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the maximum power consumption and thermal dissipation ratings for the 1788-CNCR module?

A: Maximum power consumption is 2.25 W, with a thermal dissipation of 8.1 BTU per hour.

Wiring & Installation:

Q: Which specific Allen-Bradley coaxial cables are recommended for use with the ControlNet ports?

A: The recommended cables are 1786-RG6 (quad shield) and 1786-RG6F (high flex coax).

Troubleshooting & Compatibility:

Q: Which key firmware revisions corrected anomalies regarding power and keeper configuration loss?

A: Firmware revision 1.8 increased tolerance to power disturbances and corrected keeper configuration loss.

Replacement & Upgrades:

Q: Can the 1788-CNCR card function as the network keeper to store ControlNet parameters?

A: Yes, the card can function as a network keeper at any legal node address between 01 and 99.