LAD-120A — 120W Security/Fire Alarm PSU with UPS Function (13.8V)

The LAD-120A is a 120W economical low-profile AC/DC security power supply with built-in battery charger and UPS function.

It supports 90–264VAC input and provides 13.8V DC output. Efficiency up to 86%.

Key Specifications

• Output voltage: 13.8V DC

• Rated current: 7.7A

• Power: 120W

• Voltage adjustment: 10.8–14.5V

• Battery charging current: 1A

• Ripple & Noise: ≤120mVp-p

UPS & Battery Features

• Built-in battery charger

• Supports lead-acid and lithium-ion batteries

• Automatic transfer to battery backup

• Forced UPS start function (CN2 pin 7–8)

• AC and battery ON/OFF switches

Status TTL Signals

• AC OK

• Battery disconnect / reverse polarity

• Battery low

• Battery full

• Discharge

Max 50VDC / 30mA.

Protection Features

• Short Circuit Protection

• Overload Protection

• Overvoltage Protection (15.5–18V)

• Over Temperature Protection

• Battery low cut-off (9.5V ±0.5V)

• Battery reverse polarity protection (no damage)

Operating temperature -20°C to +60°C.
Dimensions 159 × 97 × 30 mm.
IP20. 3-year warranty.