Hi,

I have a DT80 series 2 which I need to drive 8 relays with the digital outputs upon alarms. There is no problem with 1-4 DSO but I have tried to use 5-8 DSO with as suggested in the manual a transistor wired into the circuit.

The following is the result i get, the relay continues to switch on then off every time the DT80 samples. If the alarm conditions are meet the relay functions as it should where the relay switches on and does not switch on and off upon sampling this only appears to happen when the alarm condition is not met.

Any ideas,
Stephen

Hi Stephen,

I should not think that there would be a wiring problem if you followed our diagrams in the manual and used an appropriate transistor to switch the relay. For this reason I am curious to see your code and schematic.

Would you mind sending me an email with your dataTaker code, the details of the relay, transistor and the circuit diagram/schematic?

I will have a look through it for you and let you know where the problem might arise.

Kade Miller