2.3
Electrical specifications
SD23 board can be supplied with any voltage in the range +12V
DC
÷ +24V
DC
range (recommended voltage range)
This voltage can be supplied through a Right-angle connector type Molex Mini-Fit Jr, p/n 39-30-0040 or
equivalent, with the pinout indicated in the table below.
Mating connector: Molex 39-01-2045 or equivalent with 5566 series female crimp terminal
2.3.1
UPS By-pass connector
The SBC-D23 board allow the possibility of connecting external UPS modules able to supply a 12V Backup, to be used in case that
the main power supply is not available
For this kind of connection, it is provided a standard Micro-fit 2x7 connector
type Molex 43045-1412 or equivalent, with the pinout shown in the table on the left.
Mating connector: MOLEX 43025-1400 or equivalent with 43030 female crimp terminal.
UPS_BYPASS: UPS power rail enable signal. Used to switch between the power rail coming from the external
UPS Module and the standard V
IN
Power Supply. Electrical level +12V_ALW with 100
-up resistor
UPS_PFO#: Generic Input. It is managed on the SBC-D23 board by I/O Expander B, Port #0 Pin #0. Electrical
level +3P3V_RUN.
UPS_INT#: This signal can be used to serve the interrupt request of the UPS device. It is managed on the
SBC-D23 board by I/O Expander B, Port #0 Pin #1. Electrical level +3P3V_RUN.
UPS_EN: IO: Generic UPS Enable signal. It is managed on the SBC-D23 board by I/O Expander A, Port #0
Pin #1. Electrical level +3P3V_RUN
UPS_BOOST_EN: Generic UPS Enable signal. It is managed on the SBC-D23 board by I/O Expander A, Port #0 Pin #0. Electrical level +3P3V_RUN
Power In Connector CN44
Pin Signal
Pin Signal
1
GND
3
VIN_SYS
2
GND
4
VIN_SYS
UPS By-Pass Connector CN3
Pin
Signal
Pin
Signal
1
---
8
+12V_BACKUP
2
VDD_SYS
9
---
3
---
10
+12V_BACKUP
4
VDD_SYS
11
UPS_BOOST_EN
5
UPS_PFO#
12
GND
6
UPS_BYPASS
13
UPS_EN
7
UPS_INT#
14
GND
