here are the symptoms:
When I power up the Relay ISOx16 Module all relays come on. By power up I mean connecting +12V and GND to the board and nothing else connected. Is this normal?
If I connect the board to FEZ Spider and power it up all relays are on (FEZ Spider is off). If I turn on FEZ Spider using USB cable or external power supply all relays turn off but while booting the Spider they come on for about 10ms and turn off again. In this scenario relays actually work properly (except for 10ms thing). Is this normal?
If I unplug 12V from Relay module for a second and turn it back on everything is still normal. If I unplug it for about 10s all relays come on after plugging it back in and stay that way until I turn any relay on or off from Spider.
When I first tested relay board I had bad power supply connected as it was supplying 12V AC instead of DC (PS got damaged somehow - that’s how I discovered that PS was bad). Do you think this damaged the board? Is the board user repairable?