Allen Bradley 1788-CNCHKR ControlNet NetChecker

The Allen Bradley 1788-CNCHKR, also cataloged as the 1788-CNCHKR ControlNet NetChecker, operates as a dedicated hardware component for active ControlNet coaxial network diagnostics within ControlNet network platforms. The hand-held diagnostic tool provides node address selection, LED status indication, and signal monitoring functions.

Suffix Breakdown & Model Matrix

The available technical documentation identifies 1788-CNCHKR as a fixed catalog number within the Allen Bradley 1788 Linking Devices product line. No additional suffix breakdown or configurable ordering matrix is specified.

Hardware Specifications

Profinet / EtherNet-IP Deterministic Network Integration

The 1788-CNCHKR is a portable ControlNet diagnostic instrument designed for physical layer network verification. The tool monitors active ControlNet coaxial communication conditions through a BNC interface and provides visual diagnostic feedback through dual-color status indicators.

Allen Bradley industrial network diagnostics rely on communication integrity analysis, network node identification, and field troubleshooting procedures. The device supports node address entry through two-digit decimal thumbwheel switches and provides diagnostic threshold selection through the function switch.

Frequently Asked Questions

Q: Does the 1788-CNCHKR provide permanent external power operation?
A: The device supports external DC power through the DC jack. Normal operation is also supported by two 1.5 VDC AA batteries.

Q: What type of connector is used for oscilloscope monitoring?
A: The module provides a 3-pin Phoenix connector for oscilloscope connection.

Q: How is the ControlNet node selected for diagnostic testing?
A: The target node address is entered using two-digit decimal thumbwheel switches with an address range from 0 to 99.

Field Installation Guidelines

• Connect the BNC interface directly to the ControlNet coaxial segment under test according to the network access procedure.

• Verify the selected node address before starting diagnostic measurements.

• Keep diagnostic connections physically separated from high-voltage wiring and high-noise power conductors.

• Use the provided oscilloscope connector only with compatible measurement equipment.

• Confirm battery condition before field deployment and use the external DC jack when required.

• Observe cable shielding and grounding practices during ControlNet coaxial signal inspection.

• Do not modify internal wiring or switch configurations beyond the specified diagnostic functions.