MHA 901
Manual Call Point
The MHA 901 Manual Call Point is a push-button with two stable states. In principle it is a break-make contact whose outlets are led to screw terminals.
The MHA 901 Manual Call Point is a push-button with two stable states. In principle it is a break-make contact whose outlets are led to screw terminals. The Manual Call Point is also shouldered with four LEDs whose outlets are led to screw terminals, too. The Call Point is used for fire aeration, and also in other applications where its connection suits.
| The Call Point is located in a plastic box with the inscription FIRE AERATION. The push-button is under a glass. On the Manual Call Point panel there are placed: | |
| a red LED | ACTIVATED |
| a yellow LED | OPEN |
| a green LED | OPERATION |
| a yellow LED | FAULT |
The MHA 902 Manual Call Point is a simplified version of the MHA 901 type. The MHA 902 Call Point contains the same break-make contact as the MHA 901, but only one unmarked red LED. The call point box is without an inscription.
| Technical parameters | |
| Contakt | |
| switched power | max. 10 W |
| switched current | max. 0,5 A |
| switched voltage | max. 100 Vss |
| Recommended LED current | 20 mA |
| Voltage drop at LED | cca 2 V |
| Conductor cross-section to the terminal | max. 1,5 mm² |
| Protection according to ČSN EN 60529 | IP 43 |
| Dimensions | 129 × 129 × 47 mm |
| Weight | |
| Working conditions | |
| The MHA 901 and MHA 902 Manual Call Points are intended for the interior of objects without occurrence of agressive substances, and for places where its protection and climatic endurance conform, and where sudden temperature changes leading to dew and ice accretion don`t occur. | |
| Working temperature range | -25 °C to +70 °C |
| Relative humidity | max. 95% at +40°C |
| Atmospheric pressure | 86 až 106 kPa |
