5
Dry Contact Relay
To use your dry contact output fail relay you must connect a 9-pin D connector to the unit. You must
use pins one and six as is indicated on page 6 in the remote connector diagram.
The relay is factory preset to fail in the closed position when the low output LED and buzzer
come on. If you wish to have the relay fail in the open position when the low output LED and
buzzer come on, you must take the cover off the unit and move the jumper to the other
position on J7. J7 is located next to the relay.
To change the position of the jumper, first turn the unit off and disconnect the unit from both the
power and batteries. Next, turn the unit on for 30 seconds to discharge the capacitors, then turn it off
again. Turn the unit upside down and remove the four screws. Remove the cover and locate J7. It
will be next to the relay as is shown in the above diagram. Simply move the jumper to the desired
position as is shown in the above diagram. Replace the cover and re-install the four screws.
Reconnect the unit to the power and batteries.