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Manuel technique Eaton MEDC
DB3BM SOUNDER TECHNICAL MANUAL
TM277.3
www.eaton.com
DC input, 3 stage without monitoring wiring details (Type 3)
This type can be configured in a number of different ways depending on requirements. Independent tone selection for all
3 stages is via the 3 off 5-way DIP switches fitted to the electronics assembly:
•
2-wire system (Single stage):
Connect the positive and negative supply wires to the terminals as detailed in the
wiring diagram.
•
2-wire system (Dual stage, reverse polarity):
Connect the positive and negative supply wires to the terminals as
detailed in the wiring diagram. The second stage is produced by reversing the polarity of the supply to the unit.
•
3-wire system (Dual stage, ve):
Connect 3 supply wires to the terminals as detailed in the wiring diagram
(1 ve wire and 2 -ve wires). Stage 1 is produced when power is applied across the ve and stage
1 -ve terminals. Stage 2 is produced when power is applied across the ve and stage 2 -ve terminals.
•
3-wire system (Dual stage, common -ve):
Connect 3 supply wires to the terminals as detailed in the wiring diagram
(2 +ve wires and 1 common -ve wire). Stage 1 is produced when power is applied across the stage 1 +ve and
common -ve terminals. Stage 2 is produced when power is applied across the stage 2 +ve and common -ve terminals.
•
4-wire system (Triple stage, Common -ve):
Connect 4 supply wires to the terminals as detailed in the wiring
diagram (3 +ve wires and 1 common -ve wire). Stage 1 is produced when power is applied across the stage 1 +ve and
common -ve terminals. Stage 2 is produced when power is applied across the stage 2 +ve and common -ve terminals.
Stage 3 is produced when power is applied across the stage 3 +ve and common -ve terminals.
All versions are supplied with terminals to allow loop-in loop-out connection of the supply wires
ote:
N
If an EOL resistor is specified on a DC unit, it will be fitted as standard across terminals 5 & 6 in the Exd chamber
(see below. Re-position EOL as required for other configurations.
When positioning the EOL, ensure there is a minimum of 14mm free space between the resistor body and terminal
block and ensure the resistor is not in contact with the PCB or housing.