Wiring Diagrams; Line Monitoring - E2S D2xB1LD2DC024 Instruction Manual

Wires having a cross sectional area between 0.5 mm² to
2.5mm² can be connected to each terminal way. If an input
and output wire is required the 2-off Live/Neutral or +/-
terminals can be used. If fitting 2-off wires to one terminal
way the sum of the 2-off wires must be a maximum cross
sectional area of 2.5mm². Strip wires to 8mm. Wires may also
be fitted using ferrules. Terminal screws need to be tightened
down with a tightening torque of 0.56 Nm / 5 Lb-in. When
connecting wires to the terminals great care should be taken
to dress the wires so that when the cover is inserted into the
chamber the wires do not exert excess pressure on the
terminal blocks. This is particularly important when using
cables with large cross sectional areas such as 2.5mm².
8) AC Wiring
3-off 2-way terminal blocks are provided on the AC beacon
for power. There are 2-off Live, 2-off Neutral and 2-off Earth
terminals in total.
8.1

Wiring Diagrams

N N L L N N L L
N
L
Fig 3. D2XB1LD2 AC Simplified Block Diagram
N L
Fig. 4 D2XB1LD2 AC Terminals
9) DC Wiring
3-off 2-way terminal blocks are provided on the AC beacon
for power. There are 2-off +ve, 2-off –ve, 1-off Stage 2 and 1-
-off stage 3 terminals in total.
9.1 Wiring Diagrams
- - + +
S2 S3
-
(Customer
+
supplied
S2
switches)
S3
Fig. 5 D2XB1LD2 DC Simplified Block Diagram
_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
Document No. D211-00-401-IS-SC
N N L L
- - + + - - + +
S2 S3 S2 S3
Issue E 02-03-2020
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Fig. 6 D2XB1LD2 DC Terminals
9.2

Line Monitoring

On D2xB1LD2 DC units, DC reverse line monitoring can be
used if required. All DC beacons have a blocking diode fitted
in their supply input lines. An end of line monitoring resistor
can be connected across the +ve and –ve terminals. If an
end of line resistor is used it must have the following values:
24V DC applications
Minimum resistance 3K9 Ohms
Minimum resistance 1K Ohms
48V DC applications
Minimum resistance 15K Ohms
Minimum resistance 3K9 Ohms
The resistor must be connected directly across the +ve and
-ve terminals as shown in the following drawing. Form the
resistor legs as shown in Fig. 8a, remove the +ve and –ve
terminal plugs and fit the resistor across the two terminal
plugs before refitting them to the PCBA as shown in Fig. 8b.
A spacing of at least 1/16" (1.58mm) must be provided
through air and over surfaces between uninsulated live parts.
Fig. 7 End of Line Resistor Forming
Fig. 8 End of Line Resistor Placement
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Sheet 4 of 10
++ S2 S3
Minimum Power 0.5W
Minimum Power 2.0W
Minimum Power 0.5W
Minimum Power 2.0W
- +
End of Line Resistor
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