MEDC SM87BG - Manual (Page 2)

English
1.0 INTRODUCTION
These manual fire alarm, emergency shutdown breakglass and pushbutton units have been designed for the most arduous
environmental conditions. The units are both easy to install and maintain. A choice of either stainless steel or marine grade
aluminium alloy makes the range suitable for either offshore or onshore industries
The units are available with the following options and features:
Lift Flap
Duty label
Tag label
Earth continuity via internal/external earth studs
LED (encapsulated)
End of Line and Series resistors and diodes (encapsulated)
Switches (two maximum)
M20 or M25 gland entries in a range of positions, with a maximum of four
Terminals up to a maximum of 9 x 2.5mm2
Test key facility on breakglass units
Optional momentary or latching with key reset actions
2.0 INSTALLATION
General
The unit should not be installed where it may be subjected to mechanical and thermal stresses or where it may be attacked by
existing or foreseeable aggressive substances.
The unit has been designed such that it does not:
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When installing and operating explosion-protected equipment, requirements for selection, installation and operation should
be referred to, e.g. IEC60079-14 worldwide and the ‘National Electric Code’ in North America. Additional national and/
or local requirements may also apply.
Ensure that all nuts, bolts and fixings are secure
Ensure that only the correct listed or certified stopping plugs are used to blank off unused gland entry points and that the
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The unit should be mounted on a vertical surface using the four off Ø9mm fixing holes in the base. These have been designed
to accept and M8 screw or bolt
MEDC recommend the use of stainless steel screws.
Cable termination
CAUTION: Before removing the cover assembly, ensure that the power to the unit is isolated
Unscrew the 4 off M6 screws (5.0mm A/F hexagon key) holding the lid to the base. Keep screws in a safe accessible place
as they are not captive.
Twist the cover assembly gently clockwise and anti-clockwise, whilst pulling it away from the base. Remove to gain access to
the interior. The cover assembly should remain attached to the base by means of a retaining strap.
Cable termination should be in accordance with specification applying to the required application. MEDC recommends that
© Cooper MEDC 2011 08/11