Components
7
2.6 Relays
Relays are solid-state switches in which the electrical current applied across one port or
terminal controls electrical currents for another terminal, such as a beacon or fan. Relays
receive signal from and transmit signal to the CAN I/O board, which communicates the
relay’s status to the CAN distribution board.
2.7 Sensors Network
External Sensor
The external temperature and rear light sensor consists of a small printed circuit board (PCB)
in a protective enclosure that mounts to the back of the display.
The temperature and light sensor transmits the external temperature and the ambient light
level behind the display to the CAN distribution board, and the VFC-3000 controller adjusts
the display accordingly.
Internal Sensor
The internal temperature, humidity (optional), and front light sensor measures the
temperature near the LED pixels and the ambient light level in front of the display. The
sensor transmits these measurements to the CAN distribution board, and the VFC-3000
controller adjusts LED intensity to protect the LEDs from overheating.
The internal sensor may also measure humidity within the display.
Bottom Sensor
The bottom light sensor is located on the bottom-right of the display. It detects the light
intensity below the display.
2.8 Ventilation and Heater Systems
Intake Fans and Filters
Filtered intake fans mount to the lower rear of the display. The VFC-3000 controller analyzes
internal and external temperature readings from the temperature sensor network and adjusts
fan usage. A filter removes dust and debris from the incoming air to protect the internal
display components.
Fan RPM Sensors (Optional)
If your display has fan RPM sensors, a mini CAN I/O board for the RPM fans is installed on
the rear wall of the display.
With this option, each intake fan connects to an RPM sensor. The sensors monitor up to 2 fans
for failure. The fans fail if they do not revolve at 1,000 RPM. This information is then reported
to and displayed on the VFC-3000 controller.
