To control port traffic signals, bridge or lock lights, Hydrosphere supplies an electronic control system custom-designed for each installation.
This system can handle complete or restricted light combinations over one or more sets of lights. Light repeaters are included to verify correct operation of remote lights. The system utilises a 240 V AC power supply with optional 24-hour battery backup.
The control system communicates with a lamp control unit at each light signal site. Sites remote from the control site can be connected by cable, up to 1,000 m in length, or a radio connection can be used for distances up to 10 km.
At each light signal site, the lamp control unit drives the signal lights. Light output can be monitored and fed back to the main control system. A mains power supply is required at the site. A 24-hour battery backup can be provided, as can a solar power supply, depending on the lights required.