© MEDC 2014
05/14
DC version Ex d & Ex de with voltage free stage activation wiring details (Types 7 & 8)
• Type 7: 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.
• Type 8: 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.
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