Commercial fire detection manufacturer Nittan has unveiled several exciting developments to its Evolution analogue addressable range, including the launch of new detectors with integral Short Circuit Isolator (SCI), and upgrades to existing devices.
New to the Evolution range are the EV-PY-SCI Photoelectric Optical Detector with SCI, the EV-H2-SCI Heat Detector with SCI and the EV-PYH-SCI Photoelectric Optical & Heat Multi-Sensor with SCI. Both the EV-H2-SCI and the EV-PYH-SCI offer EN 54:5 Heat Category P programmable to four settings (A1R, A2S, BS & CS), with the latter having an additional setting for combined smoke heat mode certified to EN 54 part 29 for Multisensors.
The integral SCI in the new Evolution devices is bi-directional and, in the event of an external fault, will shut down on one side to protect the system, whilst allowing the device to continue communication with the fire alarm control panel from the opposite side. The isolator has a very low internal resistance (Zcmax) of less than 50mΩ and will self-reset when the fault is cleared.
The new devices also benefit from Nittan’s advanced PY smoke sensing chamber and microprocessor control for maximum effectiveness. A spherical feature incorporated within the chamber provides superior light scattering, plus an orange LED is used which significantly improves response across the fire spectrum. The shape of the ‘PY’ smoke chamber is optimised to minimise the effect of dirt/dust contamination, plus a fine stainless steel micromesh prevents the ingress of even the smallest insects which can create false alarms.
This sophisticated technology, developed by Nittan, has now also been employed across several other Evolution devices, including the EV-PY Photoelectric Optical, EV-H2-A1R Rate of Rise Heat Detector, EV-H2-CS High Temperature Heat Detector 84 DEG C and EV-PYH Photoelectric Optical & Heat Multi-Sensor. These devices are all backwards compatible with previous Evolution models to provide seamless support on existing sites.
