NI 9501 modules can return the following faults as a decimal fault code. Convert the decimal fault code to a binary number to determine which fault bits are true. For example, a fault code of 2 is the binary number 10, indicating a fault in bit 1 of the fault bitmap (Module Overvoltage Fault).

Table 574.
Fault BitFault NameDescription
0 Module Undervoltage Fault The external power supply (Vsup) is not connected, does not meet the minimum power supply voltage specifications, or one of the module outputs has a short circuit. Verify that the output currents and power supply are within specifications and check the module connections.
1 Module Overvoltage Fault The external power supply (Vsup) voltage exceeds the module power supply specifications. Verify that the power supply is within the module specifications and that the supply is properly connected to the module.
2–15 Reserved —