Eaton DB3B, Technical Manual

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5
Sounder - dB3B
TM264 June 2019 www.eaton.com
Sounder - DB3B
English
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 preselected tone for stages
2 to 5 are produced. See tone table 2 for details of
pre-selected tones.
Noee: N
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.
R1 - OPTIONAL EOL RESISTOR
R1
+VE IN
+VE OUT
-VE IN
-VE OUT
STAGE 1
STAGE 2
STAGE 3
STAGE 4
STAGE 5
COMMON
T1
T2
T3
T4
R1
R2
R3
R4
R5
R0
CUSTOMER
WIRING
DB3B Ex d CHAMBER
Ex de – DC input with voltage free stage
activation wiring details (Type 12)
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.
Noee: N
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.
R1 - OPTIONAL EOL RESISTOR
LOCATED IN Ex d CHAMBER
R1
DB3B Ex e CHAMBER
CUSTOMER
WIRING
1
2
3
4
1
2
3
4
+VE IN/OUT
-VE IN/OUT
STAGE 1 (R1)
STAGE 2 (R2)
STAGE 3 (R3)
STAGE 4 (R4)
STAGE 5 (R5)
COMMON (R0)
4.0 Operation
The sounder is available in various AC input voltage
versions and a single DC input voltage version.
For AC versions, the nominal operating voltage is stated
on the unit label and the supply voltage tolerance is ±10%.
For DC versions, the absolute input voltage range is
11.0Vdc to 57.6Vdc.
If using an EOL resistor with a value between 700Ω and
2KΩ the maximum voltage should be limited to 28.8Vdc,
if using an EOL resistor with a value between 470Ω and
700Ω the maximum voltage should be limited to 26Vdc.
The unit is fitted with a volume control which is positioned
on the top face of the electronics assembly PCB.
Maximum volume is obtained when this control is turned
fully clockwise. When turned fully anti-clockwise the unit
will emit no sound.
Warning : Do not attempt to turn the volume control past its
limits of movement as this may cause damage to the unit.
Stages
For all versions, a 5-way DIP switch selects the stage
required for each stage. The settings for the standard
stages are shown in the table below: