Eurotech Appliances zeus pxa270 Manuel D’Utilisation

 

© 2007 Eurotech Ltd    Issue D 

The ZEUS is designed to operate from a single +5V±5% (4.75V to +5.25V) input or the 

onboard 10V to 30V DC/DC PSU.  

DC input voltage (10-30V) is connected through a front panel locking DC jack J3 (see 

the section 

). When operating from the 10 to 

30V input, the 5V connector (J2) is NOT fitted. The input rails are protected from 

overcurrent, overvoltage, undervoltage and reverse battery conditions, and include 

transient suppression to achieve compatibility with vehicle power supplies. The on-

board DC/DC converter can provide a maximum current of 5A at 5V at a temperature 

range of 0-70°C (32-158°F). 

For vehicle-based applications, the supervisory circuit monitors the auxiliary ignition 

supply input (Vig), and provides feedback of ignition status to the PXA270 (IG_FAIL 

signal at GPIO115). If the Vig falls below 9.2V, IG_FAIL becomes logic ‘1’. This can be 

used to instigate an orderly shutdown or to store ignition status data. 

For 5V only operation, the ATX style connector J2 is used as the main power input for 

the ZEUS. In this case, connector J3 and the entire DC/DC PSU circuit is depopulated. 

The power connector J2 has a +12V connection too, but it is not required for the ZEUS 

under normal operation. It can be used to supply +12V to the PC/104 stack if required. 

For details of the 5V power connector see the section 

, page 

. Contact 

 (see page 

) for details. 

 

If a CompactFlash and an LCD display are used, ensure the total current 

requirement on the 3.3V rail does not exceed 900mA. Please check the 

datasheets of the devices you are using.