Components
5
CAN I/O Board
The CAN I/O board is an input/output interface that also monitors the status of the power
supplies, door open sensors, control beacons, fans, and heaters.
DC / DC Converter Board
The DC / DC converter board converts the 24 VDC output of the power supplies to 9 VDC.
The power is then used by the light and temperature sensors, CAN distribution board, CAN
I/O board, sensors, and LVDBs within the display.
2.4 Panelboard
The panelboard is a circuit breaker box that distributes incoming power to the fans, DC / DC
converter, and outlets.
2.5 Surge Suppressor
The parallel surge suppressor protects the display from current spikes.
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.
