RELIANCE Intelligent ALCMS
Power-line-carrier individual light control and monitoring that brings stop-bar-level precision to every lamp on the airfield series circuit.
The RELIANCE Intelligent ALCMS (Airfield Lighting Control and Monitoring System) is ADB Safegate's individual-lamp-addressable control platform for airfield ground lighting (AGL). Its defining characteristic is power-line carrier (PLC) communication: all command and status data is superimposed directly onto the existing 6.6 A series-circuit cabling at frequencies between 20 kHz and 200 kHz, across 11 distinct bands and up to 176 independent communication channels. This means a single circuit can carry individually addressable control for up to 600 lights (300 dual-channel remote units per circuit) without laying any additional cable — a material advantage on brownfield apron or runway-extension projects where trenching is expensive. Each Remote Unit monitors connected lamps and reports failure status in real time, including adjacent-lamp failure flagging, so maintenance staff can locate a failed fitting by circuit address rather than by physical inspection. The system's software-defined segmentation allows circuits to be logically repartitioned post-installation, enabling stop bar reconfiguration, taxiway routing changes, and CAT upgrade without physical rewiring. It supports stop-bar and elevated or in-pavement Runway Guard Light (RGL) control to the standard required for CAT I, II, and III operations, and integrates with SMGCS for follow-the-greens taxi routing and conflict-resolution logic. Communication latency is under one second for multi-light group switching, and circuit reach extends to 20 km roundtrip. The system has been deployed at Abu Dhabi International Airport as part of its A-SMGCS Level 4 Follow the Greens solution, and at Red Sea International Airport as part of a CAT II addressable AGL solution designed for future CAT III upgrade. Compliance with FAA L-890 (AC 150/5345-56) and ICAO Annex 14 Volumes 1 and 5 makes it interoperable with both regulatory environments served across the GCC.
Technical specifications.
| Frequency bands | 11 bands, 20–200 kHz |
| Data rate | Up to 8 kbps |
| Addressable lights per circuit | Up to 600 (300 dual-channel remotes) |
| Circuit length | Up to 20 km roundtrip |
| Switching latency | < 1 second (multi-group command) |
| FAA compliance | L-890 AC 150/5345-56 (ETL Certified) |
| ICAO compliance | Annex 14 Vol. 1 paras. 5.3 & 8.3; Aerodrome Design Manual Part 5 |
| Military standard | UFC 3-353-01 para. 15-3 |
| Communication method | Power-line carrier (PLC) on existing series circuit — no dedicated data cable |
| Independent communication channels | Up to 176 |
| Series circuit current range | 1.8–6.6 A RMS |
| Series circuit voltage (max) | 5,000 V AC RMS |
| Remote operating temperature | -40 °C to +65 °C |
| Remote power consumption (max) | 8 W W |
Use cases.
- ›Selective stop-bar activation and automated taxiway routing for SMGCS and Follow the Greens operations
- ›CAT I/II/III airfield lighting control and lamp-supervision at international hub airports
- ›Brownfield AGL upgrades where new dedicated data cabling is cost-prohibitive
- ›Real-time failed-lamp detection and location identification to reduce maintenance response time
- ›Runway Guard Light (RGL) control — both elevated and in-pavement — for runway incursion prevention
- ›Incremental CAT upgrade (e.g. CAT II → CAT III) via software-defined circuit re-segmentation without physical rewiring