Aspirating smoke detector module
The aspirating smoke detector module continuously extracts air samples from the monitored 19" rack using a suction fan. By default, the module is equipped with two highly sensitive smoke sensors, which can be configured to have adjustable response sensitivity and which analyze the air samples for the presence of smoke particles. The different response sensitivities enable a combination of pre-alarms and main alarms:
As soon as the first sensor detects smoke particles, the system triggers a pre-alarm. At this stage, electrical circuits can be disconnected automatically as an obstacle to the further expansion of emerging fires. If, nevertheless, the fire continues to develop, the second sensor will detect smoke particles which in turn activates the main alarm. At the same time, the control electronics of the system activate the Novec TM 1230 extinguishing module.
Novec™ 1230 extinguishing module
The Novec™ 1230 extinguishing module consists of a pressure-resistant metal container with the extinguishing agent Novec™ 1230 by 3M™, a release mechanism with a valve and a propellant gas cartridge, an extinguishing agent leakage monitor and the OneU extinguishing nozzle. During the extinguishing process the propellant gas cartridge is opened and the liquid extinguishing agent is released.
The special geometry of the nozzle ensures that the extinguishing agent is vaporized when exiting the nozzle enabling it to unfold its full extinguishing effect. The agent permeates through the rack and all installed devices and cable spaces. In ventilated IT racks, the central position of the nozzle on the front side of the device is also beneficial for the distribution of the extinguishing agent. The fire is extinguished quickly, without residues. A Novec™ 1230 module stores enough extinguishing agent to protect closed 19" racks with a maximum volume of up to 2.8 m3.
Power supply, control system, information
The power supply module, consisting of the power supply unit and rechargeable batteries for the emergency power supply, ensure uninterrupted operation for at least four hours. The detection and control electronics equipment permanently monitors the smoke sensors for proper functioning and possible contamination and automatically triggers the Novec™ 1230 module in the event of a fire.
Optionally, the extinguishing module can be activated via an external manual release. Floating contacts are available for forwarding alarms and malfunctions, e.g. to a central process control or to a superordinate fire detection system installed in the building, as well as for power shutdowns. A two-line LCD display and six additional LEDs indicate the operating status of the OneU fire protection system. OneU fire protection systems can also be integrated in Ethernet networks to route messages via text message or email, and to display them on IP-enabled devices.