E2S D1xB2X Series, Инструкция по эксплуатации

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European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH sales@e2s.com Tel: +44 (0)208 743 8880
www.e2s.com Fax: +44 (0)208 740 4200
Document No. D191-00-601-IS Issue 1 20-03-2020 Sheet 4 of 8
8) Cable Connections
The units have 2-off M20 x 1.5 threaded entries and 3-off ¾”
NPT x 14 threaded entries.
Electrical Connections are to be made into the terminal blocks
using solid or stranded wire, sizes 0.5-2.5mm2 / AWG 20-14.
Wire insulation needs to be stripped 6-7mm. Wires may be
fitted securely with crimped ferrules. Terminal screws need to
be tightened down with a tightening torque of 0.4 Nm / 3.5 Lb-
in.
See section 5 of this manual for access to the enclosure.
9) Wiring
A 4-way terminal block is provided on the DC beacons for
power. There are 2-off +ve, 2-off –ve terminal and an internal
Earth boss.
9.1 Wiring Diagrams
Fig. 3 D1xB2X Simplified Block Diagram
Terminals
- - + +
Fig. 4 D1xB2XDC Terminals
9.2 Line
Monitoring
On the D1xB2X unit, 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 in the explosion proof
enclosure. If an end of line resistor is used it must have the
following values:
Minimum resistance 3K3 Ohms
Minimum Power 0.5W
Minimum resistance 500 Ohms Minimum Power 2.0W
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. 7a, fit the resistor across the two
terminals, as shown in Fig. 7b.
Fig. 7a End of Line Resistor Forming
Fig. 7b End of Line Resistor Placement
10) Earthing
The unit has an external and an internal earth terminal, (please
see fig 8).
Internal earthing connections should be made to the internal
Earth terminal in the base of the housing using a ring crimped
terminal to secure the earth conductor under the earth clamp.
The earth conductor should be at least equal in size and rating
to the incoming power conductors.
External earthing 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 4mm
”
in size.
Fig. 8: Internal and External Earth Locations
End of Line
Resistor
Internal Earth
Terminal
External Earth
Stud