Orbis Intrinsically Safe Heat Detector A1R ORB-HT-51146 Ctec Addressable and the terminal block is

and the terminal block is simply inserted into the connector at the back of the unit

Sewosy SHOKV4 Green Manual call point with Buzzer and LED Indicator

C-Tec NC802DB Conventional Call Point with Button Reset and Remote Socket

it is one of Europe's best-selling addressable fire panels

Orbis Intrinsically Safe Heat Detector A1R ORB-HT-51146 Ctec Addressable and the terminal block isThe European Standard EN 54 5 classifies heat detectors to the highest ambient temperature in which they can safely be used without risk of false alarm. The classes are identified by the letters A to G (Class 1 is subdivided into A1 and A2). In addition to the basic classification, detectors may be identified by a suffix to show that they are rate of rise (suffix R) or fixed (static) temperature (suffix S) types. All heat detectors in the Orbis I. S.