Beckhoff EL1904 Digital Input Terminal
6 fault codes documented
Max Supply Voltage μC1 Exceeded
The supply voltage to microcontroller 1 (μC1) within the EL1904 terminal has exceeded its maximum permissible limit. This overvoltage condition can stress internal components and potentially lead to permanent damage to the microcontroller.
Max Supply Voltage μC2 Exceeded
The supply voltage to microcontroller 2 (μC2) within the EL1904 terminal has exceeded its maximum permissible limit. This overvoltage condition can stress internal components and potentially lead to permanent damage to the microcontroller.
Min Supply Voltage μC1 Not Met
The supply voltage to microcontroller 1 (μC1) within the EL1904 terminal has fallen below its minimum permissible limit. This undervoltage condition can cause unstable operation or prevent the microcontroller from functioning correctly, potentially leading to system errors or shutdowns.
Min Supply Voltage μC2 Not Met
The supply voltage to microcontroller 2 (μC2) within the EL1904 terminal has fallen below its minimum permissible limit. This undervoltage condition can cause unstable operation or prevent the microcontroller from functioning correctly, potentially leading to system errors or shutdowns.
Max Internal Temperature Exceeded
The EL1904 terminal has detected that its internal temperature has exceeded the maximum permissible value. This often indicates that the ambient temperature around the terminal is too high, leading to overheating. Prolonged operation in this state can reduce terminal lifespan or cause component failure.
Exceeded Temperature Difference Between Measuring Points
The EL1904 terminal has detected an excessive temperature difference between its internal measuring points. This can indicate uneven heating or cooling within the terminal, possibly due to poor installation, restricted airflow, or proximity to a localized heat source. This condition can lead to thermal stress on components.