I have a cFP-PWM-520 module for controlling some electric heaters, but it doesn't work. The module is connected to eight solid state relays which in turn controls the heaters. Regardless of duty cycle setting, voltage supply or channel, the output is always zero (Vout-COM voltage is zero), but the status indicator is lit. I know this indicates a short circuit so I have tried the two different ways to reset the channels several times, but with no luck.
The relays are working when I connect 24V directly to them. So is this module broken? If it is, what could be the reason? A faulty power supply delivered 36V to Vsup on the module for a short while (about one minute), could this be the reason?
Thanks
Martin
