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      Illuminated Annunciator
      Relays MR
      • Annunciator Relays
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        MRE 11 and MRE 21
      • Illuminated Annunciator Relays MR 12 and MR 22
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Brochures

Products - Annunciator Relays and Illuminated Annunciator Relays MR

Illuminated Annunciator Relays MR 12 and MR 22

Illuminated Annunciator Relays MR 12

The illuminated annunciator relay MR 12 is used for indication of fault and operating conditions. It is especially qualified for such cases where an illuminated indication is preferred to a mechanical flag indicator. Its very small dimensions (base area 39 mm x 46 mm) permits an assembling in banks of large quantities. This model is ideally suited for signalling in control rooms and switchboards, as well as in mimic diagrams.

Construction:
The illuminated annunciator relay MR 12 is a semi-automatic relay that can be activated optionally by NO or NC contacts. The required control is adjusted by simply changing the position of two operating screws on the bell crank. The display is made by a lamp box with a tubular lamp being installed in the relay. The front of the lamp box is covered by an engravable black plastic plate. For the optical display no additional auxiliary voltage is necessary beside the coil energizing voltage. This is especially important for applications where the relay is used for the supervision of voltages.

Function:
In the normal condition the indicating area is black, with the response of the relay the contacts are brought to their operating position and the bulb in the lamp box is energized by a relay contact. The engraved legend lights up. By pressing the reset button below the lamp box the message is acknowledged, and the lamp contact is switched to a second circuit. The other contacts retain their normal position, With the clearance of the fault the bulb is switched off automatically. Customarily the operating position is signalled by flashing light and the acknowledgement position by steady light.

In addition to the operation described above the relay is also available with contacts directly driven by the armature, that means they are indepentend from the acknowledgement.

Illuminated Annunciator Relay MR 22

Application:
Similar to annunciator relay MR 12

Function:
The illuminated annunciator relay MR 22 operates fully-automatically. A manual reset and a possibility for an adjustment from normally de-energized to normally energized are not provided. Depending on the input contact (NO or NC) the relay reponds if energized or de-energized, respectively. Simultaneously the contacts are actuated and the legend lights up. With the clearance of the the lamp is extinguished and the contacts return to their normal position.

Illuminated Annunciator Relays MR12 and MR22

 

Helmut Mauell Limited
PO Box 183, Calne
Wiltshire, SN11 9BZ

Tel:01249 812 046
Fax:01246 817 096