Overview

The ABB G4AC (HENF209544R1) control board converts low-frequency signals to radio-frequency (RF) for reliable power-line communications. It integrates a DPLC modem, a digital signal processor, and an accessible human-machine interface for configuration.

Engineers deploy this board in harsh electromagnetic environments where signal integrity and deterministic timing are critical. Moreover, the board supports multiple serial and voltage interfaces to connect PLCs, controllers, and legacy telemetry equipment. Therefore, the G4AC provides a practical migration path for utilities modernizing legacy carrier links while preserving existing cabling.

Technical Data

Typical Applications

The G4AC is widely used in substation automation for long-distance telemetry over existing power conductors. For example, it transmits real-time status and fault information between remote substations and central control centers.

It supports grid protection schemes that require low-latency exchange of trip and interlocking signals. Engineers also use the unit in renewable energy farms to aggregate distributed asset telemetry without adding communication ducts. The on-board diagnostics and HMI facilitate faster commissioning and field troubleshooting.

FAQ

Q1: What main function does the G4AC perform?
A1: It converts low-frequency telemetry signals to RF for reliable power-line carrier communication.

Q2: Which system does this board integrate with?
A2: The board is designed for ABB’s ETL600 Digital Power Line Carrier System.

Q3: What interfaces are available for integration?
A3: It supports RS-232, V.11, and V.24 serial and voltage interfaces.

Q4: Is the G4AC suitable for harsh substation environments?
A4: Yes, it is engineered for electromagnetic robustness and industrial operational reliability.

Q5: How can this board help legacy system upgrades?
A5: It enables reuse of existing power-line wiring while adding modern modulation and diagnostics.