ambient SYSTEM ABT-EKB-20M, Руководство пользователя

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2. ABT-EKB-20M – keyboard extension
Every extension added to fireman microphone or zone microphone provides additional 20 functional
buttons. The extension has two I2S interfaces to connect another extension. In accordance
with EN54-16, one of the buttons should call microphone visual and sound signaling test.
Fig. 1. ABT-EKB-20M microphone extension
1.
LED indicators
– freely programmable; RGB left diode, green right diode
2.
Functional buttons
– freely programmable
1.