Photon Focus MV8-D8424-G01-GT, User Manual, Page: 100 / 139

13 Hardware Interface
13.6.2 Input Fault Detection
All inputs support a fault detection which signalises irregular conditions such as small
differential signals, shorts, opens, overvoltages and undervoltages. The fault condition of each
input can be read out by a software parameter. A fault condition remains active until it is
acknowledged by a software command.
Additionally Led S1 signalises the fault condition on LineIn0 and LineIn1. It turns on, when a
fault condition exists and turns automatically off when the input fault is resolved.
Section 13.2 lists the input range, the corresponding logic levels and fault conditions.
Unused inputs should be configured as single ended and the N-input must be
tight to ISO_GND in order not to get an I/O fault condition.
If an error condition has been detected on an input and signalized by the Line-
Fault parameter, it must be acknowledged by the LineFaultAcknowledge command
in order to use or reconfigure the corresponding input again.
Parameter
LineFaultUpdate
must be performed in order to update the error state.
13.6.3 Single-ended Line Input
LineIn0, LineIn1 or LineIn2 can be configured as single-ended input (Table 13.8 lists the
available standards). Fig. 13.3 shows two examples, how a single-ended configured input can
be used.
The inputs must be driven by a push-pull stage or an open drain output with a
pull-up resistor.
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