Heartland Ovation 2800 Owner's Manual page 34

Contact Closure
If your external timer is simply a relay contact closure, make sure J4, J6, and J5
are on and J7 is off. Important: J4, J5, and J7 should never be on at the same
time!!!
Operation
When a session is started, voltage will be applied to the TPI input. The display on
the Heartland Timer will show the maximum time and count down. When the
session ends, the voltage will be removed from the TPI input and the bed will turn
off. Any remaining session time showing on the Heartland Timer will be eclipsed.
NOTE: The Heartland timer can not be used as a stand alone timer in the TPI
mode.
If the FST or Database Series timers are in delay the Heartland Timer will show a 0.
However, pressing the Start/Stop button on the Heartland Timer will eclipse the
delay time and start the session. Pressing the Start/Stop button on the Heartland
timer will also clear the clean room indication on the FST and Database timers.
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