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7) Cable Connections
Electrical connections are to be made into the terminal blocks
on the PCBA located in the enclosure. See section 5 of this
manual for access to the enclosure.
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) Wiring
3-off 2-way terminal blocks are provided on the beacons for
power. There are 2-off +ve, 2-off –ve, 2-off Earth.
8.1
Wiring Diagrams
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Fig. 3 D2xB1XH1 & D2xB1XH2 Simplified Block Diagram
Fig. 4 D2XB1H1 & D2xB1H2 Terminals
8.2
Line Monitoring
On D2xB1XH1 & D2xB1XH2 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:
Minimum resistance 3K9 Ohms
Minimum resistance 1K Ohms
The resistor must be connected directly across the +ve and
_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
Document No. D211-00-251-IS-SC
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Minimum Power 0.5W
Minimum Power 2.0W
Issue F
02-03-2020
-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. 5 End of Line Resistor Forming
Fig. 6 End of Line Resistor Placement
9)
Earthing
The unit has both internal and external earth terminals,
(please see fig 3).
Internal earthing connections should be made to the internal
earth terminal on the PCBA, (please see fig 5 for AC, fig 8 for
DC). The earth conductor should be at least equal in size and
rating to the incoming power conductors. The internal earth
bonding wire connects the PCBA earth terminal to the
internal earth terminal in the enclosure back box.
External earth connections should be made to the M5 earth
stud, using a ring crimp terminal to secure the earth
conductor to the earth stud. The external earth conductor
should be at least 4mm2 in size. The external earth crimp
ring should be located between the two M5 plain washers
provided and securely locked down with the M5 spring
washer and M5 nut.
sales@e2s.com
www.e2s.com
Sheet 4 of 9
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End of Line Resistor
Tel: +44 (0)208 743 8880
Fax: +44 (0)208 740 4200
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