Allen-Bradley 1407-CGCM Combination Generator Control Module

Configured for generator synchronization, excitation regulation, and protective metering in Logix-based power control networks, the Allen-Bradley 1407-CGCM (1407-CGCM Combination Generator Control Module) provides direct electrical execution. The module integrates generator paralleling, breaker synchronization, AVR regulation, and power system diagnostics through embedded microprocessor logic with ControlNet communication capability.

Suffix Breakdown & Model Matrix

The supplied documentation identifies the unit as a fixed configuration model with ControlNet communication capability. No additional suffix matrix or configurable ordering structure was provided in the source material.

Hardware Specifications

ControlNet Deterministic Network Integration

The 1407-CGCM exchanges synchronization status, excitation parameters, and protective trip conditions through deterministic industrial communication architecture compatible with Allen-Bradley Logix environments. ControlNet transport permits cyclic transfer of generator metering values, synchronization permissives, and breaker control states without dependence on non-deterministic Ethernet traffic behavior.

The module supports coordinated generator paralleling through synchronized control execution between excitation loops and breaker timing logic. Integration with Logix controllers allows centralized monitoring of kW sharing, reactive power balance, and synchronization phase conditions during closed-transition operations.

Frequently Asked Questions

Q: Does the 1407-CGCM support redundant generator control configurations?
A: The module documentation references redundant CGCM auto-transfer capability for systems requiring alternate generator regulation paths during controller or module transition events.

Q: Can the module perform synchronization and protection simultaneously?
A: Yes. The CGCM executes synchronization, excitation regulation, and protective monitoring concurrently through internal microprocessor functions.

Q: Is the RS-232 port intended for permanent supervisory communication?
A: The RS-232 interface is typically used for configuration, diagnostics, and local engineering access. Continuous supervisory communication is generally handled through the ControlNet network interface.

Field Installation Guidelines

Install the module inside a grounded industrial enclosure with separation between low-voltage communication wiring and generator excitation conductors. Current sensing circuits should use properly rated CT secondary wiring with shield termination at a single grounding point to reduce induced noise.

Verify phase rotation before synchronization commissioning. Incorrect phase sequence may produce synchronization rejection or breaker closure faults.

Maintain physical clearance between ControlNet communication cabling and generator output conductors to reduce EMI coupling during load transitions and breaker operations. Use shielded serial communication wiring for RS-232 connections routed near excitation equipment.

Confirm chassis backplane capacity before module insertion, especially in systems populated with multiple high-current communication or power management modules.