The annunciation unit is built with panel mountable and wall mountable types which can be available as per requirement. In front side, removable Legend display Facias are installed in A4 size standard sheets.
In the rear side, the input connections and power supply connections are provided. Input card and the mother board cards are completely isolated. Input cards have connection to the input field contacts, power supply unit and external push button connections.
All inputs are completely isolated from the mother board. This input card can serve from 8 to 1000 channels by cascading them. Card extensions are provided for easy increase in channels by creating a daisy-chain network of Input, Output, Repeat Relay cards.
The alarm contact relays and hooter contacts are present in the input card. Each channel can be configured for Trip / Non-trip Alarm and N.O. / N.C. Input configurations.
The whole unit has self-diagnostic features, power failure management and other redundancy features. Power failure indications are provided in the front side of the annunciator.
Test and Standards
Dry Heat Test : IEC 60068-2-2
Damp Heat (Steady State) Test : IEC 60068-2-3
Sinusoidal Vibration Test : IEC 60068-2-6
Electrostatic Discharge Immunity : IEC 61000-4-2,2001
Radiated Susceptibility Test : IEC 61000-4-3,2006
Electrical Fast Transient Immunity : IEC 61000-4-4,2004
High Energy Surge Immunity Test : IEC 61000-4-5,2006
Conducted RF Immunity Test : IEC 61000-4-6,2004
Power Frequency Magnetic Field : IEC 61000-4-8,2001
Damped Oscillatory Wave Immunity : IEC 61000-4-12,2001