Introduction; Installation; General; Cable Termination - Eaton SM87BG Manual Del Usuario

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:
• Give rise to physical injury or other harm due to
contact.
• Produce excessive surface temperature, infrared,
electromagnetic or ionising radiation.
• Have non-electrical dangers.
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 NEMA/IP rating of the unit is maintained. MEDC
recommend the use of a sealing compound such as
HYLOMAR PL32 on the threads of glands and stopping
plugs in order to maintain the IP rating of the unit.
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 all cables and cores should be correctly
identified. Please refer to the wiring diagram provided
with the product.
Ensure that only the correct listed or certified cable
glands are used and that the assembly is shrouded
and correctly earthed. All cable glands should be of an
equivalent NEMA/IP rating to that of the manual call
point and integrated with the unit such that this rating is
maintained.
The internal earth terminal must be used for the
equipment grounding connection and the external
terminal is for a spplementary bonding connection
where local codes or authorities permit or require such a
connection.
Once termination is complete, carefully push the cover
assembly back onto the base avoiding damage to the
mating surfaces. Ensure that the retaining strap is not
trapped between the mating surfaces and that the o-ring
is correctly seated in its groove. Ensure the retaining
strap and wires are clear of the microswitch actuator
and operating mechanism. Replace the 4 off M6 screws
(5.0mm A/F hexagon key) into the holes in the cover
assembly and tighten evenly. Ensure the maximum gap
of 0.15mm is maintained between the cover and the base
once assembled.
Call points sM87BG/pB Exi TM147 Issue H January 2020 www.eaton.com
Call points SM87BG/PB Exi
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