2.3
Electrical specifications
SBC-C31 board needs to be supplied with any voltage in the range +12V
DC
÷ +24V
DC
range. All the other voltages necessary for the working
of the board and of the connected peripherals are derived from the main V
IN
power rail.
It is possible to supply the module by using two different power connectors (factory alternatives).
The first possible power connector for VIN voltage is a standard 5.9mm (internal pin, diameter 2.5 mm) DC Power Jack, locking type, CN1.
As an alternative, the board can be equipped with a 2-pin PCB Terminal Block with front spring-
cage connection type PHOENIX CONTACT p/n 1990973 or equivalent, which can be used for the connection of an
external PSU.
2.3.1
RTC Battery
For the occurrences when the module is not powered with an external power supply, on board there is a cabled coin Lithium Battery to supply, with a 3V voltage,
the Real Time Clock present on-board. Battery used is a cabled CR2032-LD Lithium coin-cell battery, with a nominal capacity of 210mAh.
The battery is not rechargeable and can be connected to the board using dedicated connector CN15 which is a
2-pin p1.27 mm type MOLEX p/n 53261-0271 or equivalent, with pinout shown in the table on the left.
Mating connector: MOLEX 51021-0200 receptacle with MOLEX 50079-8000 female crimp terminals.
In case of exhaustion, the battery should only be replaced with devices of the same type. Always check the
orientation before inserting and make sure that they are aligned correctly and are not damaged or leaking.
Never allow the batteries to become short-circuited during handling.
Batteries supplied with SBC-C31 are compliant to requirements of European Directive 2006/66/EC regarding batteries and accumulators. When putting out of order
SBC-C31, remove the batteries from the board in order to collect and dispose them according to the requirement of the same European Directive above mentioned.
Even when replacing the batteries, the disposal has to be made according to these requirements.
Power IN PCB terminal block - CN2
Pin
Signal
1
V
IN
2
GND
Battery connector CN15
Pin
Signal
1
V
RTC
2
GND
CAUTION: handling batteries incorrectly or replacing with not-approved devices may present a risk of fire or explosion.
