FOCUS 200 PLUS Installation and Setup Guide12-18• Ordinarily, system operation ceases at this time and there is no further signaling to the CCC.However, if this option is selected, it allows the control unit to continue processing and sendingsignals until the battery voltage drops to the point where the battery cut-off relay operates (nextitem), thereby extending normal operation for several hours, depending on the size of the battery.The low battery condition is stored in control unit memory for subsequent printout along with thetime and date. When AC power is restored (battery voltage rises above approximately 12.3 volts), abattery restore signal is transmitted to the CCC.• There is a built-in battery cut-off relay that serves to protect the battery against deep discharge. Ifthe voltage drops to approximately 9.8 volts, the relay disconnects the battery from its load toprevent deep discharge of the battery. At this point, all processing and transmission of signalscease.• There is an automatic check for the connection of the battery leads, which is required by FM andwith the latest revision of NFPA 72. The check involves momentarily turning off the battery chargevoltage and measuring the voltage where the leads are connected to the circuit board. If the checkshows that the battery is missing for 45 seconds, the operating panel will display:< ? NOTE: Systemhas batterytroubleContinue >Also, a battery-lead-disconnect signal is transmitted to the CCC. A battery restore signal is transmittedwhen the leads are reconnected.Battery Charger SupervisionThe system checks the battery charger every 200 seconds. If the system detects a charger fault, a signalis sent the CCC and a trouble message is displayed at the operating panels.Powering Up the Control UnitAfter all the wiring procedures have been completed, and you are ready to power up the control unit,perform the following steps:Step Action1 Turn the power switch on the control unit to the ON position.2 Verify that the AC transformer is providing the correct voltage by measuring acrossterminals 1 and 2 (17 - 19.5VAC when power line is 110 - 120VAC).3 Verify that the battery float charging voltage is correct by measuring across the batteryterminals (13.5 - 13.8VDC with no battery or fully charged battery connected).4 Verify that the operating panels are showing the correct display and can accept keyentries.
