_______________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH www.e2s.com Tel: +44 (0)208 743 8880
Document No. D202-00-011-IS Issue 3 25-08-2023 Sheet 6 of 8
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 / UKEx or NEC/CEC certified adapters.
12) Cable & Wiring Connections
The units come with two options.
A DIN rail version which has 8-way connection and allows for
limited wiring of EOL devices by customer, or, full pre-wired
configurations if outlined with order to E2S.
For full wiring details see wiring diagrams D202-06-211
The PCB Terminal Version has a 6-way connector but is
designed to allow for full customer configuration with Series
and EOL devices in a number of wiring configurations. E2S
can also configure unit at time of order to E2S
For full wiring details see wiring diagrams D202-06-212
For EOL and Series device limitations and configurations see
Section 15. Fitting can be requested by E2S at the order
stage or added to the correct terminal blocks afterward. All
devices must comply with the requirements stipulated in
section 15.
Electrical Connections are to be made into the terminal
blocks using solid or stranded wire.
Wires having a cross sectional area between 0.5 mm² to
2.5mm² (AWG 20 – 14) can be connected to each terminal
way.
In most configuration an input and output wire can be fitted to
individual terminals, where these are more complex and 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.
DIN Rail Terminals: 0.51 Nm / 4.5 Lb-in;
Connector Block Terminals: 0.87 Nm / 7.7 Lb-in;
PCBA Main Terminals: 0.45 Nm / 4.0 Lb-in;
PCBA EOL and Series (1 & 2) Terminals: 0.38 Nm / 3.4 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.
13) Testing unit operation
The break glass unit can be tested without the need to
break/replace the frangible glass element.
A test key (Plastic Key Supplied with unit) is used to
mechanically drop the glass down activating the switch.
The test key is inserted in the test cam and rotated clockwise
by an angle of 90º the glass element will visibly drop down in
the viewable window.
The call point switch will now change over its contacts to
operate the alarm.
Once testing is complete the unit needs to be reset, the test
key is rotated back anticlockwise 90º to its original vertical
position. The glass element should now raise up so it is level
again (horizontal) in the viewable window.
1. 2. 3.
Insert test
Hold in Rotate back
Key rotate
position anticlockwise
clockwise
during to reset
60º
test
14) Replacement of glass element
If the break glass unit has been operated the broken glass
element can be quickly replaced.
The break glass cover plate is removed by unscrewing the 4
off M4 cap head screws attaching it.
