2.3
Electrical specifications
SBC-C57 board needs to be supplied only with an external 12V
DC
to 24V
DC
power supply, with a minimal 60W power rating (SBC-C57 power
consumption by itself is around 11W, more power is required for the possible attached devices).
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 6.4mm (internal pin, diameter
2.5 mm) DC Power Jack CN27, type Wurth p/n 694108301002.
As an alternative, the possible power connector is a 2-pin PCB Terminal Block with front spring-
cage connection CN26, type PHOENIX CONTACT p/n 1990973 or equivalent.
2.3.1
Power requirement
When powering SBC-C57 with a PSU with characteristics greater or equal to the one described in paragraph 2.3, please consider thoroughly the use scenario of
the board (i.e., which peripherals will be connected)
Since all the power must be supplied by a single external PSU, it must be cumulated the power consumption of the board itself with that of all external devices.
This way it is possible to calculate preliminarily if a 60W PSU can be sufficient for the cumulated power requirements or a more powerful PSU is required.
2.3.2
RTC Battery
The SBC-C57 board is equipped with a low-power Real Time Clock on-board, a NXP PCF2123.
If the board is not equipped with an optional rechargeable battery, it will only be available a horizontal holder for a 3V coin cell lithium battery to supply the RTC.
The battery used is a not-rechargeable CR1225 Lithium coin-cell battery, with a nominal capacity of 48mAh, to supply such an RTC. The battery must be plugged
on the onboard battery holder CN9.
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-C57 are compliant to requirements of European Directive 2006/66/EC regarding batteries and accumulators. When putting out of order
SBC-C43, 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 connector CN26/CN27
Pin Signal
1
V
IN
2
GND
CAUTION: handling batteries incorrectly or replacing with not-approved devices may present a risk of fire or explosion.
