rtd ATX104HR-EXPRESS, User Manual

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ATX104HR-EXPRESS
User’s Manual
ATX104HR-EXPRESS 18 RTD Embedded Technologies, Inc.
Sec12V and -12V converters
+5V to +-12V converters generates power for peripheral devices such as EL- or
TFT- panels, hard drives, motors etc. The +12V output is capable of supplying up
to 2.0A of current. +12V power is available from terminal block TB3. The -12V
power is available from terminal block TB1. (See previous section for location of
TB3). The +12V and -12V supplies also power the PCI104-express and the PCI
bus.
Onboard status LED’s
The ATX104HR-EXPRESS is equipped with 4
indicator LED’s. The function of the
LED’s is described below.

LED1 - Green. Ind5V power converter is operational

LED2 - Green. Ind3.3V power converter is operational

LED3 - Green. Ind12V converter is operational

LED4 - Green. Indicates -12V converter is operational
Overload protection
Both +5V and the +3.3V converter is current limited to 10A. The current limit is
slightly higher that the maximum continuous output current to ensure reliable
operation near the maximum rated output power.
The +12V converter is rated to 2A and the -12V converter is rated for 500mA. The
+12V converter output is limited to 2.0A. The -12V converter output is limited to
500mA. The outputs of the +12V and -12V converters will allow short-term error
conditions, and are not designed to accept long-term over-voltage or reverse
polarity.
Use of Ultra-low ESR tantalum capacitors and stable temperature characteristics
ensure low noise and good transient performance over the complete rated
operating temperature range of
–40 to +85C. PCB layout is optimized to provide
lowest radiated and conducted noise.