Parker Pro Display 12 Instruction Book
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8.2. Power supply considerations
8.2.1. Supply voltage
Before any installation of the system can take place, make sure that the ignition lock of
the vehicle is turned off and that the battery is disconnected.
8.2.2. Emergency stop
Make sure that an Emergency Stop switch disconnecting the power supply, is easily
accessible at any time. The figure below shows how to connect the emergency stop.
BATTERY
PRO DISPLAY
POWER
SUPPLY
INPUT
C1:12
VBATT
C1:1
EMERGENCY
STOP
GND
Figure 28: Emergency stop connection principle
Danger! Risk of injury.
The emergency stop must disconnect the power supply to the module; do not connect
the emergency stop as a signal input only. The emergency stop must be installed so that
the risk of module reverse feed is avoided.
8.2.3. Connecting of supply voltage
The supply voltage should be within the specified operating voltage range, see Appendix
A. Connect the supply voltage to VBatt and GND. Protect the module by using a fuse.
For recommended fuse rating, see Appendix A.
8.2.4. RTC back-up supply
The Pro Display module has a clock that is used for date/time stamping when logging
data. The real time clock back-up power supply is based on a super capacitor. (There is
no separate power supply input for RTC). Back-up supply gets charged from the module
power supply.
NOTICE: If the customer application is relying on RTC functionality, then RTC back-
up supply maximum operating times shall be taken into account during application
development.