The Littelfuse ACBC-120 is a dual purpose alarm controller/battery charging unit. When there is a loss of 120VAC power, the ACBC-120’s primary function as an alarm controller activates. When this power loss occurs, input power is switched to a 12VDC, lead-acid, rechargeable backup battery and a 12VDC alarm consisting of a strobe light and/or a horn is activated. The horn follows a 2 second on/2 second off pattern with a “horn silence” option to turn the sound off. An LED indicator on the unit also signals that the device has entered the alarm mode.
When 120VAC input is present the alarm circuit can be tested and the Littelfuse unit’s secondary function as a 12VDC backup battery charger is activated. In fast charge mode, the unit has the capability to source up to 100mA of charging current. However, the device normally charges at a current of 14mA in maintenance mode. The alarm circuit can be tested by pressing the “test” button located on the front of the unit or by activating an external switch via the “alarm contact” pin.
The device has the ability to signal low battery voltage if the voltage
drops below 10.5VDC. The device can also detect if no battery is present
or if the battery is connected backwards. In either of these cases, the
Littelfuse ACBC-120 will signal a battery error and will not attempt to charge. The Littelfuse ACBC-120 requires a Rectangular 12 pin socket. for surface mounting. Littelfuse part number is SD12-PC.
Features & Benefits
Controls 12VDC alarm circuit >> Activates strobe and/or horn when power loss occurs
Selectable fast charge mode >> Unit sources higher charging current up to 100mA (normal mode is 14mA)
Trip delay timer >> Prevents nuisance tripping
Battery fault detection and reverse polarity protection >> Signals if battery voltage drops below 10.5VDC and can detect if no battery is present or if the battery is connected backwards
LED Indication >> Visual indication of unit status or trip
Test button >> Preventative maintenance check of the alarm circuit by pressing the test button on the unit or externally through alarm contact connection
Specifications
Input Characteristics
Supply Voltage AC Input Voltage 120 V +/-10%
Frequency 50/60Hz
AC Input Current 0.018A (max.) 0.003 (typical)
AC Input Power 2.4W (max.) fast charge current 0.4W (typical) maint. charge current
Functional Characteristics
Battery Charging Characteristics
Acceptable Battery Type 12V lead-acid rechargeable
Fast Charge Current 100mA +/-10%
Maintenance Charge Current14mA +/-50%
Low Battery Alert Level10.5V
Output Characteristics
Strobe Light Alarm Output 12VDC@1A (max.)
Horn Alarm Output 12VDC@1A (max.)
General Characteristics
Temperature Range-40° to 60°C (-40° to 140°F)
Standards Passed
Electrostatic Discharge (ESD) IEC 61000-4-2, Level 3, 6kV contact, 8kV air
Radio Frequency, Radiated 15 0MHz, 10V/m
Fast Transient Burst IEC 61000-4-4, Level 4, 4kV input lines; 4kV signal lines
Safety Marks
UL: (SD12-PC socket required) UL508 (File #E68520)
Dimensions: H 44.45 mm (1.75”); W 60.325 mm (2.375”); D 104.775 mm (4.125”) (with socket)
Weight: 0.7 lb. (11.2 oz., 317.51 g)
Mounting Method: Surface mount with #8 or #10 screws(plug into SD12-PC socket)
Socket Available : Model SD12-PC (UL Rating 600V)The 600V socket can be surface mounted
Ordering Part Numbers
ACBC-120 120 volts
ACBC-120-SD 120 volts with SD12-PC socket included
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Littelfuse ACBC-120...Littelfuse ACBC-120...Littelfuse ACBC-120
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