The Manual Call Point MHA 142 is intended for manual fire signalling by a person discovering the fire. It is used for the analogue addressable system or conventional loops of Fire Detection and Fire Alarm System LITES.
The Manual Call Point MHA 142 is intended for use at places protected against weather influences wherever it suits its IP protection and climatic resistance. The Manual Call Point MHA
142 meets requirements of standard EN 54 -11.
The Manual Call Point connects to the addressable C.I.E. MHU 109, MHU 110, MHU 111, MHU 115, MHU 116, MHU 117 and not addressable C.I.E. MHU, 102, MHU 103, MHU 106, MHU 108
and MHU 113.
The Manual Call Point can be used in addressable system or in conventional system with current and voltage detection loops as a direct replacement of MHA 102, MHA 108 a MHA 141.
To the Manual Call Point can be connected Remote Indicator MHS 409, MHS 408, eventually MHS 407.
Addressing and setting of a Manual Call Point is carried out using preparation MHY 535.
| Technical parameters | |
| Addressable system | |
| Power supply | 20 (-3 to +1) Vimp addressable C.I.E. LITES |
| Equivalent current | 120 μA |
| Range of setting address | 1 ÷ 128 |
| Not addressable system | |
| Power supply | (16 ÷ 24) VSS |
| Nominal power supply | 21,5 VSS |
| Current during fire alarm | |
| - current regime | 20 (-5 to +1) mA |
| - voltage regime | max. 100 mA, (limited by C.I.E.) (5,7 ÷ 8) V by10 mA |
| Optical signalling in detector | red LED |
| Protection according to ČSN EN 60 529 | IP 43 |
| Radio screening degree according to ČSN EN 55 022 | B-class equipment |
| Cross-section of attachable conductors | (0,1 ÷ 1,5) mm2 |
| Size of vista | (66 × 66) mm |
| Mechanical protection of button | glass plate |
| Dimensions w x h x d | 130 x 130 x 45 |
| Weight | cca 270 g |
| Working conditions | |
| The Manual Call Point is intended for stationary use in areas protected against weatherproof with classification according to ČSN EN 60 721-3-3: | |
| Working temperature range | -20 °C to +70 °C |
| Relative humidity | max. 95 % by 40 °C, (85% to 95% / ≤ 40 °C) 100 hours./year |
