Delta Electronics PMU-27V155WCCA Buffer Power Supply 27V 155W DIN Rail

The Delta Electronics PMU-27V155WCCA is a high-performance buffer power supply designed for 24V battery systems. It provides a stable 27V DC output with adjustable voltage and current, making it ideal for security, fire alarm, and industrial automation applications. With DIN rail mounting and comprehensive protection features, this unit ensures reliable operation in demanding environments.

Advantages

High efficiency >90% reduces energy loss and heat generation. Wide input voltage range (85-264 Vac) ensures compatibility with global power grids. Adjustable battery charging current (0.5-5 A) allows customization for different battery capacities. Compact convection-cooled design eliminates fan noise and maintenance.

Suitable for

• Security and access control systems
• Fire alarm and emergency lighting
• Industrial automation and process control
• Telecommunications equipment
• Any 24V battery-backed application

Key specifications

• Input: 85-264 Vac, 47-63 Hz
• Output: 27 Vdc (adjustable 24-28 Vdc), 5.74 A, 155 W
• Battery charging: 27.6 Vdc, 0.5-5 A adjustable
• Efficiency: >90% at 230 Vac, 100% load
• Operating temperature: -20°C to +70°C
• Protection: Overvoltage, overcurrent, overtemperature, short circuit, battery reverse polarity
• Mounting: DIN rail
• Cooling: Convection
• Indicators: DC OK, Battery Fail, Battery Low, Charger Fail
• Communication: Dry contact for DC OK, Battery Fail, Battery Low, Charger Fail
• Safety: UL/cUL, TUV, CE
• MTBF: >700,000 hours

Recommendations

For optimal performance, use with 24V lead-acid batteries (VRLA, Gel, Flooded). Ensure proper ventilation for convection cooling. Adjust charging current according to battery manufacturer specifications.