Tripp Lite by Eaton SmartPro Advanced User Guide 614-40195—Rev 01 274. Plug the RPO connector into the back of the UPS and fix the screws.5. Connect and restart the UPS according to the previously described procedures.6. Activate the external remote shut down contact to test the functionAlways test the RPO function before applying your critical load to avoid accidental load loss.PPrrooggrraammmmaabbllee ssiiggnnaall oouuttppuuttssThe SmartPro incorporates several programmable signal outputs: one relay output and two optocoupler outputs(DB9 pins 1 and 8). Signal outputs can be configured (see Settings > Comm settings > Output Signals) to reportthe following information:Table 22. Programmable Signal Outputs DetailsSignal Default Assignment DescriptionOn battery (On Bat) DB9-Pin 8 UPS is in battery modeLow battery (Low Bat) DB9-Pin 1 UPS is in battery mode and has reached the lowbattery alarm thresholdBattery fault (1) Relay output Battery faultUPS OK DB9-Pin 7 Load is powered with no alarm (from inverter orbypass)Load protected - UPS is on inverter, with no alarm and ready to goto batteryLoad powered - Load is powered(from inverter or bypass)General alarm - Choose events that will trigger this alarm troughthe LCD (Settings > Comm settings > Generalalarm).For more information on possible events pleaselook at User settingsOVLD pre-alarm - Overload pre-alarmBat disconn - Battery is disconnectedFigure 8. Relay Output DetailsInterfaces and Communication