Input element with isolator MHG 942 is an addressable technological detector with built-in isolator intended for cooperation with Fire Detection and Fire Alarm System LITES for
automatic signalling of user defined exceptional state(s) of any external device, which indicates this state either by closing or opening an electrical contact or by voltage received by the optoisolated input. Contacts can also be set as guarded.
The element is connected to an addressable detection line of C.I.E. MHU 109, MHU 110/111, MHU 115 or MHU 116/117. Address is set by addressing preparation MHY 535. During operation the unit is not operated, normal state is not signalled. Active state is signalled by blinking red LED. Remote light indicator MHS 408 or MHS 409 can be connected.
The element has a built-in isolator, which can be disabled. The element can be used as just isolator; in this case there is no need to set an address.
|Power supply||(18 to 21) Vimp|
|Rated voltage||20 Vimp|
|Optical signalling||red LED|
|Parallel signalling||MHS 409, MHS 408|
|Input optoisolated – voltage|
|input voltage||5 V ÷ 30 V|
|input resistance||cca 10 kΩ|
|contact – closing/opening|
|output voltage||20 Vimp|
|output current||1,2 mA|
|Address range (set by MHY 535)||1 – 128|
|Parallel signalling line resistance||max. 100 Ω|
|Cross-section of connectable wires||(0,2 ÷ 1,5) mm²|
|Protection according to ČSN EN 60529||IP 40|
|Radio screening degree according to ČSN EN 55022||B-class equipment|
|Dimensions||(81 × 81 × 24) mm|
|Weight||cca 85 g|
Product is intended for operation with safe equipment in sense of ČSN EN 60950.
|The MHG 942 is intended for the interior of objects with out occurrence of aggressive substances, and for places where its protection and climatic immunity conform, and where sudden temperature changes leading to dew and ice accretion don`t occur.|
|Working temperature range||(-25 to +70) °C|
|Relative humidity||max. 95 % at +40 °C|
|Atmospheric pressure||(86 to 106) kPa|