We setup a Xbee digital DIO adapter (9 - 30 vdc) to send a message when pin 1 - 4 goes high or low using state change. The voltage applied to pin 1 - 4 is 12 vdc, When 12 vdc is applied the device sends state change (pin high) message, shorts power supply, sends state change (pin low) message. As soon as we switch on 12 vdc power supply dies. When using 6 vdc on pin 1 -4 and switch pin to high, voltage drops from 6vdc - 2.7 vdc and messages are sent correctly. All dip switch are set to off, all DIO used pins are disabled except pins used for input and these are set to 3. This is not the expected behavior as described to us about the adapter.Anyone have any information that may explain this behavior?
Thanks in advance.