Protection of triacs and opto-triacs against overvoltages by Transil diodes
Transfer of the diagnostics information to the higher-level control system
Control modes
Half-wave control:This is the control method used in normal operation. At every zero crossover, the channel is controlled depending on the parameterized setpoint value. The control variable is set to values between 0 and 100%. The reference basis is 1 second. With half-wave control, it is possible to control loads with peak inrush currents of up to 15 A.
Output power
9 power output channels, 400V/480V each (3 outputs per phase)
Switching capacity per output:
POM4320 busbar mounting (IEC): max. 6400 W at 400 V or 7680 W at 480 V
POM4320 busbar mounting (UL): max. 6 000 W at 400 V or 7 200 W at 480 V
Switching capacity per POM:
POM4320 busbar mounting (IEC): max. 57 600 W at 400 V or 69 120 W at 480 V
POM4320 busbar mounting (UL): max. 54 000 W at 400 V or 64 800 W at 480 V
Ventilation
A fan module can be optionally mounted at the top of the rack so that 4 POMs can be ventilated and controlled depending on the internal temperature.
Temperature monitoring
There is an NTC thermistor in the device for monitoring the internal temperature. This temperature-dependent resistor switches off the power outputs of the module from an internal temperature of 100 °C ± 3 °C (not yet finalized).
Fuses
IEC versions: Two 16 A fuses are available for each power output in a fuse module that can be accessed from the front to protect the power triacs.
Diagnostics options
Diagnostics functions are provided to detect the following faults as standard:
Implicit diagnostics means that the heating power is not influenced by the diagnostics themselves
Outgoing fuse is defective / triac at high resistance (exception: setpoint value 0%)
Incoming line fuse is defective
Triac has failed (exception: setpoint value 100%)
Emitter cable is defective (short-circuit and interruption)
Load defective (short-circuit and interruption)
Monitoring of supply voltage
Line voltage compensation
Internal compensation is carried out to compensate line voltage fluctuations
The function runs on the HCS master; it can be switched on and off by the user
The measured voltage values from each POM are available to the HCS master
