The fault annunciator device ESS8 is compact and reasonably priced new value reporting devices providing collective report formation and horn triggering as well as potential-free output contacts for driving signalling tableaux. By external attachable push buttons both the reports themselves and the horn can be acknowledged and also a lamp test can be executed. The contacts for horn and collective reports are designed as potential-free NO contacts.
If an alarm lines up longer than the response delay, the corresponding indicator lights up, horn and collective report are activated as well as the alarm is being stored. All incoming alarms inputs are shown in flashing light. The horn acknowledgment ends the signal of the horn attached externally. When the acknowledgment push button for the lamps is pressed when the alarm is still lining up, the flashing light indication changes into steady light. Otherwise the indicator light goes out. The collective report is deactivated only after acknowledgment and remedying of all individual alarms.
In case of a larger number of messages, the ESS8 can be enlarged accordingly in groups of 8 by means of extension modules. In this way, systems with up to 80 fault alarms can be set up.