The following diagram describes the behavior on power cut and power return of the IP65 modules.
Tc
Time duration of power cut to power supplies (voltage < 14 V).
Tr
Time duration of power return to power supplies (voltage > 19.2 V).
Module power supply voltage
If the power cut to the modules is less than 10 ms, it will not cause a fault in the module.
A break greater than 10 ms can cause the module to stop and therefore reconfigure on return of power.
The voltage supplied to the module is not monitored by the TBX.
If power to the module is cut for more than 2 ms, voltage monitoring detects this fault before the fastest input is set to 0.
Similarly, when the supply voltage exceeds 19.2 V, the voltage monitoring system waits for 16 ms before signaling this, so as to be able to set the slowest input.
This then ensures coherent input values if no power supply fault is detected.
Preactuators power supply voltage
If power to the preactuators is cut for more than 1 ms, voltage monitoring detects this fault and sets the outputs to 0.
When the power supply voltage once more exceeds 19.2 V, the voltage monitoring system waits for 16 ms before signaling and validating the outputs again.
A break in the power supply to the preactuators will not cause any internal fault to the module.
