27.6vdc 3a Power Supply Large Housing Monitored | 2403Sm-2Mp

The 2403SM-2MP is a professional-grade 27.6VDC regulated power supply designed for fire systems, access control, door entry, and security installations requiring battery backup and remote fault monitoring. Housed within a robust hinged steel enclosure, it provides reliable power distribution alongside dedicated mains, battery, and PSU monitoring outputs.

Designed to accommodate up to two 12V 9Ah backup batteries, the 2403SM-2MP ensures continued operation during mains power failures while providing voltage-free monitoring outputs for integration with fire alarm systems, building management systems, and remote fault reporting equipment.

Key Features

• 27.6VDC regulated output
• 3A power supply
• Mains monitoring output
• Battery monitoring output
• PSU fault monitoring output
• Voltage-free fault contacts
• Hinged steel enclosure
• Deep discharge protection
• Short circuit protection
• Supports up to 2 x 12V 9Ah batteries

Technical Specifications

Power Supply Unit

• Product Type:
  • Monitored Power Supply Unit
• Output Voltage:
  • 27.6VDC Regulated
• Output Current:
  • 3A
• Battery Charging:
  • Additional 300mA Charging Circuit
• Battery Capacity:
  • Up to 2 x 12V 9Ah Batteries
• Monitoring Outputs:
  • Mains Fail
  • Battery Fail
  • Output/Fuse Fail
  • Voltage-Free Contacts
• Compliance:
  • EMC EN61000-6-1
  • EMC EN61000-6-3

Protection Features

• Deep Discharge Protection
• Current Limiting
• Short Circuit Protection
• Mains Transient Protection

Construction

• Mild Steel Enclosure
• White Powder Coated Finish
• Hinged Lid Design
• Front Tamper Protection
• Top Cable Entry
• Bottom Cable Entry
• Rear Cable Entry

Typical Applications

• Fire alarm systems
• Access control systems
• Door entry systems
• Security installations
• Building management systems
• Emergency release systems
• Remote monitoring applications
• 24V locking systems

Benefits

• Provides uninterrupted power during mains failures
• Supports remote fault monitoring
• Accommodates standby battery backup
• Simplifies maintenance and diagnostics
• Professional steel enclosure
• Ideal for critical life-safety and security systems

Monitoring Features

The 2403SM-2MP includes dedicated voltage-free monitoring outputs that allow external systems to monitor:

• Mains failure
• Battery failure
• Output or fuse failure
• Overall PSU status

This makes it particularly suitable for monitored fire and security installations where system faults must be reported immediately.

Typical Uses

The 2403SM-2MP is commonly used to power:

• Fire alarm interfaces
• Access control controllers
• Magnetic locks
• Emergency door release systems
• Security equipment
• Building management devices
• Monitoring systems