Indicating preparation MHY 740 is an accessory to the linear smoke detector MHG 664. It is placed in a plastic box with protection either IP 40 or IP 54, intended for mounting on a wall.
Indicating preparation allows transfer of information about the detector’s state to a place accessible by the operator. The Indicating preparation is permanently connected to the detector with a cable and it allows signalling of alarm condition of the detector. After removing of the cover it allows connection of an addressing preparation MHY 536 or MHY 537 for control and setting of the detector.
Indicating preparation is made in two variants:
MHY 740.286 - Indicating preparation IP 40
MHY 740.276 - Indicating preparation IP 54
| Technical parameters | |
| Power supply | from the linear smoke detector or an addressing preparation MHY 536 or MHY 537) |
| Optical signalling | ALARM and FAULT red and yellow LEDs |
| Cross-section of connectable wires | (0,2 ÷ 1,5) mm² |
| Protection according to ČSN EN 60529 | |
| MHY 740.286 | IP 40 |
| MHY 740.276 | IP 54 |
| Radio screening degree according to ČSN EN 55022 | B-class device |
| Dimensions | |
| MHY 740.286 | 81 x 81 x 24 mm |
| MHY 740.276 | 82 x 82 x 55 mm |
| Weight | |
| MHY 740.286 | 80g |
| MHY 740.276 | 130g |
Indicating preparation is intended to operation with safety equipment in the sense of ČSN EN 60950.
| Working conditions | |
| The MHY 740 Indicating preparation is intended for the interior of objects without 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 °C to +70 °C |
| Relative humidity | max. 95% at +40 °C |
| Atmospheric pressure | 66 to 106 kpa |
