MOFLASH SIGNALLING S00608 Manual
INSTALLATION & TECHNICAL INFORMATION
PLEASE READ PRIOR TO INSTALLATION
Moash Intrinsically Safe Sounder Range
S00608, Issue 8, 19/10/2021
AUDIBLE SIGNALLING DEVICES
APPROVALS AND CONFORMITIES
technical@moash.co.ukwww.moash.com
1.0 Introduction
The Moash Intrinsically Safe Sounder product (IS-S-02) is ATEX and
IECEx certied. The Sounder is approved to be installed in Groups I (Min-
ing) and Group II (above ground), Zones 0, 1 or 2 with gas groups IIA, IIB,
IIC and Zones 20, 21 and 22 for dust groups IIIC and carries a tempera-
ture classication of T6. The Sounder comprises of a 2 stage alarm and
has a total of 32 selectable alarm tones via a DIP switch which is set
upon installation. When powered via a suitable Galvanic Isolator or Zener
Barrier the Sounder will draw a constant 33mA. The Sounder has diode
reverse polarity protection and is also End of Line resistor compatible.
2.0 Intrinsically Safe Labelling
The product will have an individual serial number printed onto the head
base plate. An example of the Sounder label is shown below.
These products have been tested by notied body Element Materials Tech-
nology who are UKAS accredited to BS EN ISO/IEC 17025:2005 and ISO/IEC
17065:2012. It is also a Notied Body for the ATEX Directive, UKEX/UKCA, an
IECEx Certication Body and an IECEx Testing Laboratory.
The sufx X at the end of the certicate numbers indicate that there are special
clauses added for safe use of these units.
3.0 Types of Approval and Standards Applied
The Moash IS Sounder product has been approved to the following standards:
IEC 60079-0:2011 / EN 60079-0:2018
IEC 60079-11:2011 / EN 60079-11:2012
EN 54-3 (Approval with BRE Global)
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4.0 Zones, Gas Groups and Temperature Classications
The Moash Intrinsically Safe Sounder is certied to the following:
Ex ia IIC T6 Ga, Ex ia IIIC T85C Da, Ex ia I Ma.
This means that the units can be installed in locations with the following
conditions when connected to an approved system:
Zones
Zone 0 Explosive gas air mixture continuously present.
Zone 1 Explosive gas air mixture likely to occur in normal operation.
Zone 2 Explosive gas air mixture not likely to occur, and if it does, it
will only exist for a short time.
Zone 20 Explosive dust air mixture is continuously present.
Zone 21 Explosive dust air mixture likely to occur in normal operation.
Zone 22 Explosive dust air mixture not likely to occur, and if it does, it
will only exist for a short time.
Gas Groupings
IIA Propane Group, IIB Ethylene Group and IIC Hydrogen and Acetylene
M1 Methane, Carbon Dust
Equipment Category
1GD & M1 Temperature Range: -40°C < Ta <55°C
Dust
IIIA Fibres and Flying, IIIB Flour and Grain, IIIC Coal Dust and Metal Dust.
The maximum surface temperature of the product during operation will
not exceed 85°C.
A Declaration of Conformity and also the Sounder Range ATEX and
IECEX Certificates are available on request or alternately visit
www.moash.com
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Fig.1b
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5.0 Installation
The TimeSaver base enables quick and easy installation of these units
with no extra cabling to be made to the head of the unit. Connections are
made to the base during the initial wiring phase which results in a faster
and more reliable installation. The sounder head ‘twists and clicks’ into
the base on commissioning, thus avoiding any wiring or connection prob-
lems associated with traditional installations.
If required, the mechanism for locking the sounder to the base can be
activated by removing the thin section of plastic shown in Fig. 1 with side
cutters or a similar tool. To open a locked head, remove the small rubber
bung from the hole on the side of the sounder insert a tool into the hole,
and depress the clip whilst twisting the head.
An alternative locking method is shown in Fig. 1b. Drive the hexagonal
locking screw forward by turning a 1.5mm hexagonal key clockwise until
the head is locked.
The O-ring and bung must be re-tted to maintain weatherproong.
General Requirement
The Sounder must be installed in accordance with the latest EN60079-0
specication or equivalent IEC specication, with consideration for any
local installation requirements, and should only be carried out by appro-
priately competent and qualied personnel.
• The location of the Sounder should be chosen with due regard to
the area over which the signalling device must be audible.
• These units are suitable for wall or ceiling mount only.
• Environmental exposure conditions during installation should be dry.
Moist or wet conditions should be avoided.
• Avoid mounting the Sounder where it may be subjected to excessive
vibration.
To mount the unit
• Remove the head from the base by rotating anticlockwise until it
comes free.
• Remove the appropriate xing hole and conduit knockouts from the
back box.
• The back box provides IP66* protection. For this to be maintained,
suitably rated (minimum IP66) M20 cable glands must also be used
for cable entry/exit.
• Insert cable glands and attach to surface.
• Select required wiring option for required operation (see wiring sec-
tion 6.0).
• Select tone by conguring the DIP switches in the head unit. The
tone table can be found on page 12 of this booklet (Pre-set to tone
18).
• Relocate head onto mounted base unit & rotate clockwise until
locked in place.
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6.0 Wiring
Table above indicates markings inside the base of the unit for wiring con-
nections.
Each unit must be powered via an approved Zener Barrier or Galvanic
Isolator whose entity parameters do no exceed:
Uo:28v, Io: 93mA, Po:660mW, Ci:0, Li:0
Operation of the Sounder Range can be taken from the table below:
Single Stage Alarm
Before nal installation of the IS-S-02 Sounder head unit onto the installed
base, the alarm tone must be set (see page 5).
To control the Sounder use either a switch in the safe area on either the
positive or negative lines into the Barrier, or by turning the power supply
on and off ,this is shown at the top of page 7.
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Line Terminal Marking
Common Positive Supply IN (3) IN+
Sounder Negative Supply (2) -
Beacon Negative Supply (1) ♫/☼
Line Terminal
Marking
Beacon
Active
Sounder
Active
Both
Active
Common Positive
Supply IN (Uo) (3) IN+ + + +
Sounder
Negative Supply (2) - - -
Beacon
Negative Supply (1) ♫/☼ - -
Two Stage Alarm
When a two stage alarm is required it is possible to activate an alternate
tone by connecting the “♫/☼” (Beacon ground) pin to 0v (as detailed in
the table on page 5).
For this application, a barrier with 2 Diode return paths is required as
shown in the diagram below:
Switching between return paths for the 2 stage system will enable the
2nd tone. Second stage tone can be found in the table on page 12.
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Galvanic Isolator
The IS-S-02 Intrinsically Safe Sounder Range is compatible for use with
suitably rated Galvanic Isolators. The Galvanic Isolators have the advan-
tage of not requiring an Isolated high integrity earth to be installed to con-
nect the Zener Barriers. These Isolators are often more expensive per
unit but may reduce installation costs as the earth is not required.
The IS-S-02 range can be powered by the Galvanic Isolators with match-
ing parameters as described in the entity parameters section of the in-
stallation sheet. The Sounder can be turned on and off either by using a
suitably placed switch in the positive or negative rails (switch must be of
suitable ratings if installed in the Hazardous area), or by turning the Gal-
vanic Isolator on and off.
As with the Zener barriers, the second stage alarm can be triggered when
using Galvanic Isolators, however an additional Intrinsically Safe relay is
required to make the additional connection.
As with all equipment in the system, the correct ratings must be main-
tained to keep the integrity and safety to the correct levels. The relay can
be switched to change between stage 1 and stage 2.
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End of line monitoring is applicable to the Sounder Product. For this to
function correctly the resistor must be connected between the IN+ termi-
nal and the Sounder Negative Supply. A suitable Zener Barrier which can
allow reverse polarity monitoring to take place and a re panel compatible
with Intrinsically Safe products must also be used.
If required, an external switch can be wired in series with the (1) and/or (2)
connections to give independent remote change over from 1st stage to 2nd
stage tones. This switch must conform to Intrinsically Safe installation
(EN 60079-0:2012 + A11:2013, EN 60079-11:2012, EN 50303:2000).
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7.0 Maintenance
Little or no maintenance is required during the normal working life of the
product. The Moash Intrinsically Safe enclosures are resistant to most
acids, alkalis and chemicals and have been designed to withstand severe
weather conditions. However it is suggested that continuous supervision
and periodic inspections may be required in relation to the requirements
of the installation as per IEC 60079-17.
To avoid the possibility of a potential electrostatic charge build up, it is
recommended that the exterior of the product is periodically wiped down
with a clean damp cloth. At this point a visual inspection is recommended
to ensure that the product is in good working order and no damage has
been sustained during its normal operation.
The enclosure is non-conducting and may generate an ignition-capable
level of electrostatic charge under certain extreme conditions. It is the
responsibility of the user to ensure that the equipment is installed in a
location where it will not be subjected to external conditions that might
cause a build-up of electrostatic charge on the surface of the unit.
8.0 Conditions for Use
The Moash Intrinsically Safe Signalling Range uses an enclosure rated
at IP66*. To ensure that this rating is maintained once installed, a suitable
cable gland must be used which matches this level of protection. The
base of the unit contains 3x M20 knockouts for wiring in purposes, and
only those required should be used. Any that are removed must have at
least an IP66 rated gland tted with cable passing through it or suitable
plug.
*= meets the IP33C requirements of EN 54-3:2001+A1:2002+A2:2006.
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