Manual call point MHA 904 is equipped with 2 change-over reed switches with two stable states that switch simultaneously, and with twocolour LED signalling state of the manual call point or an external device. One change-over contact can switch up to 0,5 A, the other one, power, can switch up to 3 A. The manual call point contains a terminal base to which the change-over contacts and two-colour LED are connected.
| Manual call point comes in following colour variant. | ||
| Red | 6XK 053 340 | Without label |
| Green | 6XK 053 341 | Without label |
| Blue | 6XK 053 342 | Without label |
| Yellow | 6XK 053 343 | Without label |
| On customers demand a custom label can be added. | ||
To terminal base 1, 2 and 3 on XT1 is connected power change-over reed switch 3 A which is controlled by manual call point’s magnet. In normal state (button not pressed) are connected terminals 1 and 2, in activated state (pressed button) are connected terminals 1 and 3.
To terminal base 1, 2 and 3 on XT2 is connected a change-over reed switch 0,5 A which is controlled by manual call point’s magnet. In normal state (button not pressed) are connected terminals 1 and 2, in activated state (pressed button) are connected terminals 1 and 3.
Terminal base XT3 has 6 terminals marked from 1 to 6. Terminals 1-5 serves for connection of two-colour LED. Terminal 6 is free and can be used for example for connection of shielding.
| Connection of two-colour LED: | |
| Terminal XT 3 | Meaning |
| 1 | common – minus |
| 2 | + 12 V green colour |
| 3 | + 24 V green colour |
| 4 | + 12 V red colour |
| 5 | + 24 V red colour |
| Technical parameters | |
| Contact: 0,5 A | |
| switched power | max. 10 W |
| switched current | max. 0,5 A |
| switched voltage | max. 48 V DC |
| Contact: 3 A | |
| switched power | min. 3 W, max. 100 W |
| switched current | max. 3 A |
| switched voltage | max. 48 V DC |
| Power supply voltage/LED consumption | 12 V/10 mA, 24 V/10 mA |
| Conductor diameter | max. 1,5 mm² |
| Protection (according to ČSN EN 60 529) | IP 43 |
| Dimensions | 129 × 129 × 47 mm |
| Working conditions | |
| The manual call point 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 | from -25 °C to +70 °C |
| Relative air humidity | max. 95% při +40 °C (100 hours/year) |
| Atmospheric pressure | 86 to 106 kPa |
