AD-155B — 155W AC/DC Power Supply with UPS Function and Battery Charger (24V)

The AD-155B is an enclosed AC/DC power supply manufactured by MEAN WELL, featuring a built-in UPS function and battery charger. It is designed for security systems, access control systems, industrial automation, and other critical 24V backup power applications.

🔌 Key Specifications

• Output Voltage (CH1): 27.6 VDC

• Adjustment Range (CH1): 24–29 VDC

• Rated Current (CH1): 5 A

• Maximum Current: up to 5.5 A

• Auxiliary Output (CH2): 27.1 V / 0.5 A

• Output Power: up to 155 W

• Type: Single Output with Battery Charger (UPS Function)

⚡ Input Specifications

• Input Voltage: 180–264 VAC

• Frequency: 47–63 Hz

🔋 UPS Operation

During normal operation, the AD-155B:

• powers the load;

• charges the connected battery.

In case of AC mains failure:

• automatically switches the load to battery power.

Charging type — constant current limiting.
The unit includes automatic battery low-voltage disconnect protection.

🛡 Protection Features

• Short Circuit Protection

• Overvoltage Protection

• Battery Reverse Polarity Protection

• Battery Low Voltage Disconnect

• Internal Fuse Protection (UPS Mode)

🏗 Mechanical Specifications

• Enclosure Type: Metal case (Enclosed)

• Mounting: Chassis / Panel mount

• Cooling: Convection (fanless)

• IP Rating: IP20

• Dimensions: approx. 199 × 110 × 50 mm

📊 Additional Technical Data

• Ripple & Noise: up to 150 mVp-p

• Voltage Tolerance: ±1.0…±2.0%

• Withstand Voltage:

  • I/P-O/P: 3KVAC

  • I/P-FG: 2KVAC

• MTBF: up to 1,818,000 hours (Telcordia SR-332)

• Warranty: 3 years