European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: +44 (0)208 743 8880
Document No. D190-00-151-IS
Issue 1
03-02-2022
Sheet 2 of 7
3)
Marking & Rating Information
The D1xS2 Alarm Horns comply with the following standards for
hazardous locations:
3.1
Class/Division Ratings for US & Canada
Standards
Class I UL 1203 & CSA C22.2 No 25-1966
Class Division Ratings for US (NEC)
Model No:
Rating
D1xS2-DC024-D /
D1xS2-AC230-D
Class II Div 1 FG T6 Ta -55°C to +70°C
Class III Div 1 Ta -55°C to +70°C
Class Division Ratings for Canada (CEC)
Model No:
Rating
D1xS2-DC024-D
Class II Div 1 FG T6 Ta -55°C to +70°C
Class III Div 1 Ta -55°C to +70°C
D1xS2-AC230-D
Class II Div 1 FG T6 Ta -55°C to +40°C
Class III Div 1 Ta -55°C to +40°C
Class Zone Ratings for US (NEC)
Model No:
Rating
D1xS2-DC024-D /
D1xS2-AC230-D
Class II Zone 20 IIIB T6 Ta -55°C to +70°C
Class Zone Ratings for Canada (CEC)
Model No:
Rating
D1xS2-DC024-D
Class II Zone 20 IIIB T6 Ta -55°C to +70°C
D1xS2-AC230-D
Class II Zone 20 IIIB T6 Ta -55°C to +40°C
Ambient Temperature Range
-55°C to +70°C (-67°F to +158°F)
IP Rating
IP66 to EN60529
4 / 4X / 3R / 13 to UL50E / NEMA250
4)
Special Conditions for Safe Use
To access the Ex d chamber, loosen the M4 grub screw on the
sounder cover. Open the enclosure by turning the sounder cover
counterclockwise and remove the cover.
Electrical connections are to be made into the terminal blocks on the
PCBA, using solid wire 0.5-4mm2 / AWG 20-12 or stranded wire,
sizes 0.5-2.5mm2 / AWG 24-14. Wire insulation needs to be stripped
8mm. Wires may be fitted securely with crimped ferrules. Terminal
screws need to be tightened down with a tightening torque of 0.45
Nm / 3.5 Lb-in.
Internal earthing connections should be made to the Internal Earth
terminal in the base of the housing using a ring crimp 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 but at least a mini mum of 0.82mm2 / 18AWG in
size.
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 4mm2 in size.
On completion of the installation the flameproof threaded joint should
be inspected to ensure that they are clean and that they have not
been damaged during installation.
Ensure the O-ring seal is in place and undamaged.
When fitting the flameproof cover ensure the thread is engaged
correctly. Fully tighten the cover all the way, ensure no gap is visible
between the cover and base of the sounder enclosure.
The cable entries have two M20 x 1.5
– 6H entry thread and a single
½” NPT thread. If the installation is made using cable glands, only
suitably rated and certified cable glands must be used. They must be
suitable for the type of cable being used and also meet the
requirements of the current installation standards EN 60079-14 /
IEC60079-14.
If the installation is made using conduit, openings must have a
sealing fitting connected within 18” of enclosure.
Any unused cable entries must be closed with suitably rated and
certified blanking plugs.
The plastic horn is not anti-static and the metallic enclosure has a
non-conductive coating. These may generate an ignition-capable
level of electrostatic charges under certain extreme conditions. The
user should ensure that the equipment is not installed in a location
where it may be subjected to external conditions that might cause a
build-up of electrostatic charges on non-conducting surfaces.
Repair of the flameproof threaded joints and cemented joints is not
permitted.
The Equipment must not be installed with the horn facing upwards
of horizontal.
Only the explosionproof cover is to be used for access to the
enclosure for installation, service and maintenance.
