Kontron JRexplus-LX - Manual (Page 36)

KTD-S0001-C Page 32 Power Supply
JRexplus LX User's Guide
18 Power Supply
The JRexplus LX supports two power supply modes: AT and ATX.
AT mode: Only one connector (4 pins) is required. After switching on the supply voltage a circuit generates
a reset and the board immediately begins to work. The JRexplus board works fine in +5V only mode. The
+12V supply voltage is optional and can be used for the backlight voltage for example. Disadvantage:
Power state S5 is consuming more current.
ATX mode: Two connectors (4 pins and 2 pins) are required. After switching on the supply voltage the board
is then immediately ready to operate, though only on standby power. When the power button is pressed the
remaining supply voltages are connected and the board begins to work.
18.1 Main Power Connector (AT/ATX)
The main power connector is available as X22 (4 pins).
Header Pin Signal Name Function
1 VDD 1) Power supply +12V
2 GND Ground
3 GND Ground
1
4 VCC 1) Power supply +5V
18.2 Power Connector Supplement (ATX)
The power connector supplement is available as X23 (2 pins).
Header Pin Signal Name Function
1 /PS_ON Power supply on
1
2 5VSB 1) Standby voltage +5V
Note: 1) To protect the external power lines of peripheral devices make sure that
- the wires have the right diameter to withstand the maximum available current.
- to enclosure of the peripheral device fulfills the fire-protecting conditions of IEC/EN 60950.