Elmdene 24V DC Door Retainer Power Supply Unit

The Elmdene 24V DC Door Retainer Power Supply Unit is engineered for critical applications in fire and access control systems where reliable, fail-safe operation is essential. It is designed to provide a stable 24V DC power output, primarily for door retainers, with an integrated safety link to fire alarm panels. In the event of a fire alarm activation, the unit safely switches off its output to release door retainers, allowing doors to close automatically as part of a life-safety strategy.

This unit features an expanded range of input control options for flexible integration, including the detection of a normally closed contact opening and the removal of a 24V DC signal. These inputs ensure a fully fail-safe operation mode, guaranteeing the system responds correctly during an emergency. Its efficient switch-mode design ensures stable performance across a wide input voltage range, making it suitable for diverse electrical installations.

Key operational features include remote control of the output, a choice of control options to suit different system architectures, and LED status indication housed within the enclosure for diagnostics. The unit is built with mains transient protection to safeguard against voltage spikes, ensuring long-term reliability in demanding environments.

Constructed to comply with BS 7273 standards for the actuation of release mechanisms for doors, this power supply unit is a trusted component in fire safety systems. Its robust design operates effectively within an environmental range of -10°C to 40°C, providing dependable service in various conditions. The compact enclosure facilitates straightforward installation within control panels or enclosures.