OVERVIEW

Official designation: Allen-Bradley 1788-CNCHKR (1788 Linking Devices, ControlNet NetChecker)

Role/Application: This is a pocket-sized, hand-held diagnostic tool for verifying signal quality and physical layer integrity on active ControlNet coaxial networks during commissioning and troubleshooting. It is battery-powered for field use.

KEY SPECS SUMMARY

Power: Two 1.5V DC AA batteries or 5V DC external

Interfaces / Ports: One BNC connector, 3-pin oscilloscope port

Indicators: Eight bi-color LEDs for diagnostic/bargraph

Operating Temp: 0 degrees C to 50 degrees C

Platform / Compatibility: ControlNet coaxial medium, Logix 5000 systems

Limit: Battery life is approximately 6 hours of continuous use

Lifecycle: Discontinued by manufacturer, replacement is N/A

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What specific signal characteristics does the 1788-CNCHKR NetChecker evaluate during analysis?

A: It measures signal reflection, distortion level, peak-to-peak amplitude, and Manchester signal encoding violations.

Wiring & Installation:

Q: Besides batteries, what are the requirements for supplying external DC power to the NetChecker?

A: The external DC power must be 5 Volts DC nominal and rated for 0.25 Amps maximum.

Troubleshooting & Compatibility:

Q: What does the TRAFFIC status indicator on the NetChecker module also signify?

A: The TRAFFIC indicator is dual-function and can also indicate a low battery condition when illuminated.

Replacement & Upgrades:

Q: Has the manufacturer provided a direct replacement or alternate diagnostic tool for the 1788-CNCHKR?

A: The manufacturer has discontinued this portable tool and has not provided an official single direct replacement.