9
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 7 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 J11. J11 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, and
then turn it off again. Remove the six screws holding on the cover, turn the unit upside down,
remove the cover and locate J11. 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.
