MOFLASH SIGNALLING S00608 Manual

INSTALLATION & TECHNICAL INFORMATION

PLEASE READ PRIOR TO INSTALLATION

Moash Intrinsically Safe Sounder Range

S00608, Issue 8, 19/10/2021

AUDIBLE SIGNALLING DEVICES

APPROVALS AND CONFORMITIES

technical@moash.co.ukwww.moash.com

1.0 Introduction

The Moash Intrinsically Safe Sounder product (IS-S-02) is ATEX and

IECEx certied. 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 classication 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 notied 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 Notied Body for the ATEX Directive, UKEX/UKCA, an

IECEx Certication Body and an IECEx Testing Laboratory.

The sufx X at the end of the certicate numbers indicate that there are special

clauses added for safe use of these units.

3.0 Types of Approval and Standards Applied

The Moash 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)

2 S00608 Issue 8

4.0 Zones, Gas Groups and Temperature Classications

The Moash Intrinsically Safe Sounder is certied 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.moash.com

S00608 Issue 8

Fig.1b

4 S00608 Issue 8

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 weatherproong.

General Requirement

The Sounder must be installed in accordance with the latest EN60079-0

specication or equivalent IEC specication, with consideration for any

local installation requirements, and should only be carried out by appro-

priately competent and qualied 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 conguring 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.

S00608 Issue 8

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.

6 S00608 Issue 8

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.

S00608 Issue 8

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.

8 S00608 Issue 8

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).

S00608 Issue 8

7.0 Maintenance

Little or no maintenance is required during the normal working life of the

product. The Moash 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 Moash 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.

10 S00608 Issue 8

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