E2S GNExB1X05, Инструкция по эксплуатации

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European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH www.e2s.com Tel: +44 (0)208 743 8880
Document No. D155-00-201-IS Issue 3 28-11-22 Sheet 4 of 5
Internal earthing connections on AC units should be made to
the Internal Earth terminal on the PCBA. 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 M4
earth stud, using a ring crimp terminal to secure the earth
conductor to the earth stud between the two M4 stainless
steel flat washers, then reassemble the M4 spring washer
and tighten the M4 nut to ensure that the cable lug is secured
against loosening and twisting. The external earth conductor
should be at least 4mm
2 in size.
7.3. Cable Glands, Blanking Elements and Adapters
The cable entry temperature may 70ºC or the cable
branching point temperature may exceed 80ºC at high
ambient temperatures and therefore suitable heat resisting
cables and cable glands must be used, rated 80
°
C for
ambient temperatures of 55
°
C and rated 95
°
C for ambient
temperatures of 70
°
C.
Cable Glands
The cable gland entries have an M20 x 1.5 entry thread. Only
suitably rated and ATEX / IECEx / UKEX certified cable
glands which must be suitable for the type of cable being
used.
Blanking Plugs
When only one cable entry is used the other entry must be
closed with suitably rated and ATEX / IECEx / UKEX certified
blanking plugs.
For combustible dust applications, the cable entry device and
blanking elements shall be in type of explosion protection and
shall have an IP 6X rating.
Ingress Protection
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable glands
or blanking plugs.
A minimum ingress protection rating of IP6X must be
maintained for installations in explosive dust atmospheres.
Adapters
The GNEx Beacon Range can be supplied with the following
types of adapters:
M20 to ½” NPT
M20 to ¾” NPT
M20 to M25
It is important to note that stopping plugs cannot be fitted
onto adapters, only directly onto the M20 entries.
Any other adapters used must be suitably rated as per the
applicable standards.
If the installation is made using conduit, openings must have
a sealing fitting connected as close as practical to the wall of
the enclosure, but in no case more than the size of the
conduit or 50mm, whichever is the lesser.
8)
Flash Patterns (DC Units Only)
The GNExB1X05 DC beacons can produce three different
flash patterns as listed below. The flash patterns are set
internally by the selection of pin headers. The flash pattern
set can be changed externally to produce a second stage by
connecting terminal S2 to –ve supply line whilst powering the
+ve and –ve supply terminals.
The AC Beacons only flash at 1Hz.
Stage 1
Stage 2
1Hz Double Strike
1.5Hz Double Strike
Double Strike Double Strike
Synchronised Operation
All GNExBG1X05 beacons that are connected to the same
supply line will have a synchronised flash rate at one flash
every second. To ensure that the units will be synchronised
check that the pin header is set to 1Hz (see Figure 5).
9) End of Line Monitoring (DC Units)
On the
GNExBG1X05
DC beacons, dc reverse line monitoring
can be used if required. All DC units have a blocking diode
fitted in their supply input lines. An end of line monitoring
diode or an end of line monitoring resistor can be connected
across the +ve and –ve terminals in the flameproof chamber.
If an end of line resistor is used it must have a minimum
resistance value of 3k3 ohms and a minimum wattage of
0.5W or a minimum resistance value of 500 ohms and a
minimum wattage of 2W.
10) Maintenance, Overhaul and Repair
Maintenance, repair and overhaul of the equipment should
only be carried out by suitably qualified personnel in
accordance with the current relevant standards:
EN60079-19/IEC60079-19 Explosive atmospheres - Equipment
repair, overhaul and reclamation
EN60079-17/IEC60079-17
Explosive atmospheres - Electrical
installations inspection and maintenance
Units must not be opened while an explosive atmosphere is
present.
Electrostatic charging hazard - Clean only with a damp cloth.
Figure 5
1.5Hz
1 Hz
Double
Strike
Warning – high-intensity light source. Avoid
looking directly at the light source for
extended periods of time.