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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. D204-00-001-IS Issue 9 12-01-2024 Sheet 5 of 8
10) Power Supply Selection
Electrical Ratings
See table 1
250Vac max. / 5.0A max (3.33A max NEC/CEC)
48Vdc max. / 1.0A max
24Vdc max / 3.0A max
48Vdc max / 20mA (LED -C option with no ballast resistor)
11) Selection of Cable. Cable Glands, Blanking
Elements & Adapters
ATEx/IECEx & UKEx Installations:
The equipment must only be installed by suitably qualified
personnel in accordance with the latest issues of the relevant
standards:
EN60079-14 / IEC60079-14: Explosive atmospheres -
Electrical installations design, selection and erection
EN60079-10-1 / IEC60079-10-1: Explosive atmospheres -
Classification of areas. Explosive gas atmospheres
The installation of the units must also be in accordance with
any local codes that may apply and should only be carried
out by a competent electrical engineer who has the
necessary training.
The equipment must not be installed with any obstruction to
the flanged flameproof joint any closer than permitted as per
EN/IEC60079-14, table 13.
For high ambient temperatures the cable entry temperature
may exceed +70ºC or the cable branching point temperature
may exceed 80ºC and therefore suitable heat resisting cables
and cable glands must be used, with a rated service
temperature of at least the values stated below:
For Single Switch models STExCP8-BGS:
Max. ambient
temperature ºC
50 55 60 65 70
req. Cable / Cable
Gland rating: ºC
76 81 86 91 96
For Dual Switch models STExCP8-BGD:
Max. ambient
temperature ºC
40 45 50 55 60 65 70
req. Cable /
Cable Gland
rating: ºC
85 90 95 100 105 110 115
The cable gland entries have an M20 x 1.5 entry thread. Only
suitably rated ATEX / IECEx or UKEx certified cable glands
which must be suitable for the type of cable being used and
also meet the requirements of the current Ex ‘d’ flameproof
installation standards EN 60079-14 / IEC60079-14.
When only one cable entry is used the other entries must be
closed with suitably rated ATEX / IECEx or UKEx certified
blanking plugs that meet the requirements of the current Ex
‘db’ flameproof installation standards EN 60079-14 /
IEC60079-14 (tightening torque 10Nm).
NEC / CEC Installations:
The equipment must only be installed by suitably qualified
personnel in accordance with the latest issues of the relevant
standards:
The installation of the units must also be in accordance with
any local codes that may apply and should only be carried
out by a competent electrical engineer who has the
necessary training.
The equipment must not be installed with any obstruction to
the flanged flameproof joint any closer than permitted as per
the NEC/CEC.
For high ambient temperatures the cable entry temperature
may exceed +60ºC or the cable branching point temperature
may exceed 60ºC and therefore suitable heat resisting cables
and cable glands must be used, with a rated service
temperature of at least the values stated below:
For Single Switch model STExCP8-BG-S:
Max.
ambient
temperature
ºC
35 40 45 50 55 60
req. Cable /
Cable
Gland
rating: ºC
61 66 71 76 81 86
For Dual Switch model STExCP8-BG-D:
Max.
ambient
temperature
ºC
20 25 30 35 40 45 50 55 60
req. Cable /
Cable
Gland
rating: ºC
65 70 75 80 85 90 95 100 105
For use in Class I Division II locations, in order to maintain
the db type protection, flameproof conduit seals and/or cable
glands must be used.
The cable gland entries have an M20 x 1.5 entry thread. Only
suitably rated and certified cable glands which must be
suitable for the type of cable being used and also meet the
requirements of the current Ex ‘db’ flameproof and NEC/CEC
installation standards (tightening torque 10Nm).
When only one cable entry is used the other entries must be
closed with suitably rated and certified blanking plugs that
meet the requirements of the current Ex ‘db’ and Ex ‘tb’
flameproof and NEC/CEC installation standards (tightening
torque 10Nm).
All Installations:
To access the Ex d chamber, remove the four off M6 x 60
stainless steel A4-70 Cap Head cover bolts.
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 2” of enclosure, whichever is the lesser.
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable glands
or blanking plugs.