AtlasPC Digital Control, Vol. I
Manual 85586V1
16
Woodward
Power Supply Monitoring Circuit (Power Supply Board)
LVdc Maximum voltage measured
35 Vdc
Resolution in volts
0.15 Vdc
Maximum Error due to temperature change
1.0 Vdc
Maximum Error due to load change
1.0 Vdc
Total maximum error at 25 °C
1.2 Vdc
(over 15 to 35 V range)
Electric Shock
The AtlasPC control platform shall not present an electrical shock hazard to the
operator or maintenance personnel when used in a normal manner per the
National Electrical Code Handbook, ANSI/NFPA 70 HANDBOOK-1990. Safety is
ensured by certification through the safety agencies specified in the “Regulatory
Compliance” section of this document.
Troubleshooting Guide
Power Supply Checks
The following is a troubleshooting guide for checking areas, which may present
difficulties. If these checks are made prior to contacting Woodward for technical
assistance, system problems can be more quickly and accurately assessed.
•
Is the input voltage within the control’s specified input voltage range
(measured at control power supply input)?
•
Is the input power free of switching noise or transient spikes?
•
Is the power circuit dedicated to the AtlasPC control only?
Discrete Output Checks
The AtlasPC power supply contains twelve discrete output driver channels. The
discrete outputs are low-side drivers having short circuit and thermal shutdown
protection. The discrete output drivers are not isolated from each other, and are
powered by an ex12 Vdc or +24 Vdc. They are isolated from the internal
power supplies of the AtlasPC Control platform.
•
Is the input power within the range of 9–32 V?
•
Is the input free of switching noise or transient spikes?
•
Is the power circuit dedicated to the control only?
•
Are the individual discrete output lines current limited by external series
connected components (example: relay coils) to <200 mA?
Summary of Contents for AtlasPC
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