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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 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 input and output power. Next, turn the unit on for 30 seconds to dis-
charge the capacitors, then turn it off again. Turn the unit upside down and remove
the four screws. 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. Re-
connect the unit to the input and output power.
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