Crane NA 4 No Audio Alarm

The Crane NA 4 DIN no audio alarm is a modular 4 channel DIN rail mounted balanced audio presence annunciator with individual potential free change-over output contacts for each channel. The unit operates from an external regulated 24 Volt dc supply and draws up to 75 mA. Input detection level is adjustable from -12 to -20 dBm via individual multi-turn potentiometers. The four relay outputs are configured to de-activate during loss of signal, thereby showing loss of supply to the unit as a fault condition. The design features a self-healing fuse with reverse transorb to protect against voltage spikes as well as for reversed polarity to the unit.

Product specifications

Sensitivity -12 TO -20 dBm adjustable
Alarm / Restore timing Set to consumer requirement
Construction Modular DIN rail mount fire retardant
Connectors Pluggable screw connections for in- and output termination
Display Leds indicate audio presence, audio fail and audio restored for each channel
Power 24Volt dc / 75 mA
Warranty Two years on components and workmanship

International Limited Warranty

Crane Electronics cc (Crane) warrants to the first purchaser of the this product that it is free from material and workmanship defects. Crane's sole obligation under this warranty shall be to provide necessary parts and labour to correct defects, if any, which appear within twenty four (24) months from date of purchase. This warranty does not cover appearance, or if the equipment has been, according to Crane's judgement:

    Subjected to misuse, abuse, negligence or accident
    Repaired or otherwise altered by persons not authorised by Crane
    Connected, installed, adjusted or used for a purpose other than that    for which it was designed

To the maximum extent permitted by applicable law, in no event shall Crane be liable for any special, incidental, indirect, or consequential damages whatsoever, including, without limitation, damages for loss of business profits or business interruption, arising out of the use or inability to use this product.


Battery Charger 403/12

Please note that this unit must be installed by a trained technician only. Failure to do so may invalidate this warranty.

The voltage for this unit is factory adjusted for either 110V or 220V AC. Before installing,please ensure that the unit is set to the correct voltage for your country.



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