European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
[email protected] Tel: +44 (0)208 743 8880
Document D150-00-651-IS Issue 2 06-08-15
Sheet 2 of 3
www.e2s.com Fax +44 (0)208 740 4200
6) Earthing
The unit has both internal and external earth
terminals.
It is recommended that a cable crimp lug is used
on the earth wires.
The internal earth wire is placed under a earth
clamp which will stop the cable twisting. This
secured by an M4 screw and spring washer.
The external earth lug should be located between
the two M5 washers provided and securely locked
down with the M5 spring washer and two locknuts.
Internal Earth
terminals
External
Earth Stud
Terminal
block
7) Cable
connections
There are 3 off cable entries for M20x1.5 cable
glands or stopping plugs.
Cable glands or stopping plugs must be rated IP66.
The unit can be wired in a number of different ways
depending on the resistor combination selected.
Option 1 – EOL (End of line) Resistor
Option 2 – Series (In line) resistor
Option 3 – Series and EOL resistors
The equipment needs to be installed with ATEX
and/or IECEx certified Zener Barriers or Galvanic
Isolators.
8)
Testing unit operation
The push button unit can be tested without the
need to replace any element.
To test, lift the cover lift flap to reveal the push
button. The button should be pressed into the body
to activate the unit and place it into the operated
condition.
The call point switch will now change over it’s
contacts to operate the alarm.
Once testing is complete the unit needs to be reset
from the operated condition.
Rotate the push button anticlockwise by an angle
of 55º, see guide alignment marks on button and
cover, shown below (1). The push button should
pop back up to its original position.
Ensure that the push button has also twisted back
clockwise by 55º to its original position see guide
marks on button and cover, shown below (2).
The unit is now reset.
1. On operated unit
2. Button should pop
Twist push button
up and twist back to
Anticlockwise 55º
original position
to reset
Note: use alignment
marks circled to
indicate the push
button’s status
/position.
Unit currently shown
as ‘standby
condition’
Resetting an operated unit is the same as resetting
a tested unit.
