_______________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
Tel: +44 (0)208 743 8880
sales@e2s.com
www.e2s.com
Fax: +44 (0)208 740 4200
Document No. D202-00-201-IS_Issue_1 07-05-2019
Sheet 4 of 8
8) Power Supply Selection
Electrical Ratings
250Vac max. / 3.33A max
48Vdc max. / 1.0A max
24Vdc max / 3.0A max
Electrical connections are to be made into the terminal blocks
/ DIN rail provided. See Section 11 for wiring options.
9) Selection of Cable. Cable Glands, Blanking
Elements & Adapters
For high ambient temperatures the cable entry temperature
or the cable branching point temperature may exceed 60ºC
and th
e
refore 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 GNExCP7-PT-S:
For Dual Switch model GNExCP7-PT-D:
The cable gland entries have an M20 x 1.5 entry thread. Only
suitably rated and ATEX / IECEx 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 and ATEX / IECEx certified
blanking plugs.
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable glands
or blanking plugs.
The GNExCP7 Call Point 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 and ATEX /
IECEx certified adapters.
10) Cable Connections
Electrical Connections are to be made into the terminal
blocks using solid or stranded wire. See section 6 of this
manual for access to the flameproof enclosure.
Wires having a cross sectional area between 0.5 mm² to
2.5mm² (AWG 20 – 14) can be connected to each terminal
way.
Wiring methods shall be in accordance with CSA C22.1,
Canadian Electrical Code, Part I, Safety Standard for
Electrical Installations, Section 32; and CAN/ULC-S524,
Standard for Installation of Fire Alarm Systems
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 0.45 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.
Max. ambient
temperature
(°C)
55 60 65 70
req. Cable /
Cable Gland
rating: (°C)
80 85 90 95
Max. ambient
temperature
(°C)
45 50 55 60 65
70
req. Cable /
Cable Gland
rating: (°C)
80 85 90 95 100 105
