DResearch – User Manual TeleObserver MR3180
2011-02-03
23
2.4.5
Power supply for the device and cameras
The interface provides power for the device itself and makes supply voltage available for further
external devices (12V DC; e.g. analogue cameras). The device is switched on and off via a connection
through the vehicle’s ignition switch.
Pinout of the
Power interface
Ensure there is a constant power supply of 12-24 VDC on Pin A2. Temporary power outages
(e.g. from lack of proper vehicle battery maintenance) will be tolerated by the device but they are
always to be avoided and can lead to system failures and permanent damage to the equipment.
The UPS must be a device which has been recommended by the manufacturer and has valid
certification for the application type. Any damage resulting from disregarding this advice will not
be covered by any guarantee or warranty.
Example showing the connection of device and cameras
Interface
Pin
Name
Description
A1
Camera12V)
+ camera power supply
A2
POWER_IN (12V – 32V)
+ power supply
A3
GND
- power supply
A4
Camera_GND
- camera power supply
1
-
2
-
3
Ignition, high, galvanically separated
(optocoupler)
4
Input1-
Ignition, low, galvanically separated
(optocoupler)
5
-
A4
A3
A2
A1
3
4
2
1
5
The device is switched on
when the pin 3 "Ignition High
Side" Voltage (min. 6V) is
applied. PIN 4 has to be
connected to the reference
potential.