MEDC DB3B User Manual
Page 8
© MEDC 2014
07/14
Ex d – DC input with voltage free stage activation wiring details (Type 11)
Connect the positive (+ve) and negative (-ve)
supply wires to the terminals as detailed in the
wiring diagram. When power is applied to the
unit, no tone will be produced initially. Connect
wires and remote switches to terminals R0 to R5
as shown. When the switch connected to R1 is
closed, the stage 1 tone will be produced as
selected by the 5-way DIP switch on the
electronics assembly. When any of the other
switches connected to R2 to R5 is closed, the pre-
selected tone for stages 2 to 5 are produced. See
tone table 2 for details of pre-selected tones.
Note: Closing more than one switch at a time will
result in no tone being produced.
If a resistor (R1) is fitted, monitoring functionality
is obtained when the supply polarity is reversed.