DRBC-1 DUAL RATE BATTERY CHARGER DESCRIPTION The DRBC-1 Dual Rate Battery Charger is a solid-state, fully automatic device that will provide sufficient current to maintain compatible rechargeable batteries at full charge regardless of variations in line voltage or load. Two charging modes are provided: FLOAT, which maintains a charged battery in fully charged condition and HIGH RATE, which permits a discharged battery to be charged rapidly. The charger senses the battery condition by monitoring the current drawn by the battery at a particular cell voltage. If the battery attempts to draw more than a specified amount of current from the charger, it will automatically switch to the High Rate mode and maintain a high rate of charge current until the batteries requirements are met. The DRBC-1 will then automatically switch to the Float mode. The DRBC-1 may provide system compatible battery supervision, high rate indication and self-contained trouble indications with audible trouble silence (with “ring-back”). Over-current and reverse polarity protection are provided as well as internal fuse protection. The charger is enclosed in a louvered 16 gauge steel enclosure 12" W x 13" H x 4" D (30.48 x 33.02 x 10.16 cm) with a viewing window to readily show all status indicators without opening the cabinet. · · · · · · AGENCY APPROVALS UL (Std 864) C.S.F.M. · S2464 7300-0694:103 · · FEATURES Two Charging Modes Self-contained Trouble Sounder with “Ringback” Silence Switch Output for FCI Model RTI Remote Trouble Indicator Battery Supervision Fully Automatic Solid State Design D.C. Voltage Regulation Electronic Current Limiting SPECIFICATIONS Input voltage Input current Output voltage Output current Charge rate Voltage stability Operating temperature Operating humidity Functional switches 120 VAC +10%, -15%, 60 Hz 2.5 amperes max. 24 VDC nominal* 5 amperes nominal 4.5 ampere hours per hour (dependent upon battery state of charge) ± 1% with line variation 32o F to 120o F (0o C to 49o C) 85% “HIGH-RATE” “TROUBLE SILENCE” Indicators “AC ” Green LED “TROUBLE” Yellow LED and audible trouble sounder. “HIGH RATE” Red LED DC Ammeter Indicates battery charging current DC Voltmeter Indicates battery terminal voltage NOTE: *The nominal output voltage can be adjusted internally to accommodate any common 24 VDC battery type. Specifications are provided for information only, are not intended to be used for installation purposes, and are believed to be accurate. However, no responsibility is assumed by Fire Control Instruments, Inc. for their use. Specifications subject to change without notice. © 1997 All Rights Reserved 16 Southwest Park, Westwood, MA 02090 USA TEL: (781) 471-3000 FAX: (781) 471-3099 An ISO 9001 Certified Company 9020-0054/Ver. 1.4