Bosch Appliances D9112 Secondary Power Terminals, Secondary DC Power, Installing the Battery

Secondary Power Terminals 4 5

Secondary (DC) Power

A 12V, 7 Ah sealed lead-acid rechargeable battery (Radionics D126) supplies secondary power for auxiliary and alarm outputs, and powers the system during interruptions in primary (AC) power.

Lead Acid Batteries ONLY: The D9112 charging circuit is only calibrated for lead-acid batteries. Do not use gel-cell or nicad batteries.

Extra Batteries Increase Back-up Time: To increase battery back-up time, connect a second 12V, 7 Ah battery in parallel to the first battery to form a 12V, 14 Ah battery. Use a D122 Dual Battery Harness to ensure proper and safe connection. You can use the D8132 Battery Charger Module to connect two additional batteries for a total of four. See the D9112 Standby Battery and Current Rating Chart in this manual for battery standby time calculations.

Installing the Battery

Place the battery upright in the base of the enclosure. Locate the red and black leads supplied in the literature pack. Connect the black battery lead to terminal 4, and then to the negative (-) side of the battery. Connect the red battery lead to terminal 5, and then to the positive (+) side of the battery.

Warning, High Current Arcs Possible: The positive (red) battery lead and Terminal 5 can create high current arcs if shorted to other terminals or the enclosure. Use caution when working with the positive lead and terminal 5. Always disconnect the positive (red) lead from the battery before removing it from terminal 5.

Replacement

Radionics recommends battery replacement every 3 to 5 years under normal use. Exceeding the maximum output ratings, or installing the transformer in an outlet that is routinely switched off, causes heavy discharges. Routine heavy discharges can lead to premature battery failure.

D8132 boosts battery backup: Adding a D8132 Battery Charger Module supports additional batteries of up to 36 Ah capacity if required.

Warning: The transformers for the D9112 and any D8132 modules connected to it must be powered from the same 120 VAC circuit. The D9112 supervises AC power by monitoring the power from the transformer connected to terminals 1 and 2. It cannot supervise the AC power for D8132 modules if their transformers are not plugged into the same AC circuit as the transformer for the panel.

Battery Supervision

When the battery voltage drops to 13.8 VDC, the yellow Charging Status LED lights. When the battery drops to 12.1 VDC the red Low Battery LED lights and the panel, if programmed for power supervision, transmits a BATTERY LOW report in the Modem II transmission format. It transmits a TROUBLE ZN 9 report in the BFSK format.

If the battery is missing or shorted, the red Low Battery LED flashes at the same rate as the green Operation Monitor LED. If the panel is programmed for power supervision, it transmits a BATTERY MISSING report in the Modem II transmission format, or TROUBLE ZN 9 report in the BFSK format.

	D9112 Operation & Installation Manual
74-06144-000-C 2/96	Page 20	© 1993-1996 Radionics