European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH sales@e2s.com Tel: +44 (0)208 743 8880

Document D150-00-001-IS Issue 5 26-08-2020 Sheet 1 of 2 www.e2s.com Fax +44 (0)208 740 4200

BExCP3A-BG

Manual Call Point – Break Glass

For use in Flammable Gas and

Combustible Dust Atmospheres.

1) Introduction

The BExCP3A-BG is a break glass manual call

point which is certified to the European and

International Gas and Dust standards. The unit

meets the requirements of the ATEX directive

2014/34/EU and IECEx scheme.

The call point can be used in hazardous areas

where potentially flammable gas and dust

atmospheres may be present.

All units have no monitoring resistors, diodes or

zener diodes.

The units are Group II, EPL (equipment protection

level) Gb. The equipment is certified ‘Ex db eb IIC

T6 Gb’ and as such may be used in Zones 1 and 2

with flammable gases and vapours with apparatus

groups IIA, IIB & IIC and temperature classes T1,

T2, T3, T4, T5 and T6.

These units are also Group III, EPL Db. The

equipment is certified ‘Ex tb IIIC T75ºC Db’ and as

such may be used in Zones 21 and 22 for

combustible dusts groups IIIA, IIIB & IIIC.

2) Ratings & Markings

All units have a rating label, which carries the

following important information: -

Unit Type No.:

BExCP3A-BG Manual Call Point

Input Voltage:

AC voltage 250V Max Current 5.0A Max

DC voltage 250V Max Current 0.25A Max Resistive

Load; Inductive Load 0.03A Max

DC voltage 125V Max Current 0.5A Max Resistive

Load; Inductive Load 0.03A Max

DC voltage 75V Max Current 0.75A Max

DC voltage 50V Max Current 1.0A Max

DC voltage 30V Max Current 5.0A Max Resistive

Load; Inductive Load 3.0A Max

DC voltage 12V Max Current 5.0A Max

Code:

Ex db eb IIC T6 Gb

Ex tb IIIC T75 ºC Db

IP66

–40ºC <= Ta <= +70ºC

Certificate No.:

SIRA 09ATEX3286X

IECEx SIR 09.0121X

Epsilon x: II 2GD

CE Marking

Notified body No. 2813

Year/Serial No. i.e. 20/1CP3ABG000001

WARNING - DO NOT OPEN WHEN AN

EXPLOSIVE ATMOSPHERE MAY BE PRESENT

3) Type Approval Standards

The call point has an EC Type examination

certificate issued by SIRA and have been approved

to the following standards: -

EN60079-0:2018 / IEC60079-0:2017

EN60079-1:2014 / IEC60079-1:2014

EN60079-7:2015 / IEC60079-7:2017

EN60079-18:2015 / IEC60079-18:2014

EN60079-31:2014 / IEC60079-31:2013

The equipment is certified for use in ambient

temperatures in the range -40

C to +70

C and shall

not be used outside this range.

4) Installation Requirements

Installation of this equipment shall only be carried

out by suitably trained personnel in accordance

with the applicable code of practice e.g.

IEC 60079-14/EN 60079-14

Repair of this equipment shall only be carried out

by the manufacturer or in accordance with the

applicable code of practice e.g. IEC 60079-19/EN

60079-19.

Refer to certificates SIRA 09ATEX3286X and

IECEx SIR 09.0121X for special conditions of safe

use.

The certification of this equipment relies on the

following materials used in its construction:

Enclosure: Aluminium Pressure Die Cast Body

LM6

Through enclosure mechanism: Plastic Nylon Zytel

Injection Moulded

Sealing of enclosure and mechanism: O-ring

Acrylonitrile-Butadiene Rubber

If the equipment is likely to come into contact with

aggressive substances, then it is the responsibility

of the user to take suitable precautions that prevent

it from being adversely affected, thus ensuring that

the type of protection is not compromised.

“Aggressive substances” - e.g. acidic liquids or

gases that may attack metals, or solvents that may

affect polymeric materials.

“Suitable precautions” - e.g. regular checks as part

of routine inspections or establishing from the

material’s data sheet that it is resistant to specific

chemicals.

5) Call Point Location and Mounting

The location of the call point should enable ease of

access for operation and testing. The unit should

be mounted using the 4 off fixing holes which will

accept up to M4 sized fixings.

View of base unit showing fixing centres (in mm).

To gain access to the mounting holes in the base

the front cover must be removed. This is achieved

by removing the 4 off M4 cap head bolts holding on

the cover.

Once the screws are removed the cover will hang

down out of the way to gain access to the Ex e

terminal block, the internal earth terminal and

mounting hole recesses.

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 is 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.

INSTRUCTION MANUAL

BExCP3A-BG Break Glass Manual Call Point

For use in Flammable Gas and Dust Atmospheres

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.

European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH sales@e2s.com Tel: +44 (0)208 743 8880

Document D150-00-001-IS Issue 5 26-08-2020 Sheet 2 of 2 www.e2s.com Fax +44 (0)208 740 4200

7) Cable connections

There are 3 off cable entry holes suitable for

M20x1.5 Ex e approved cable glands or stopping

plugs

The unit can be wired in a number of different ways

depending whether normally open or normally

closed contacts are required. See wiring schematic

D150-06-001 for wiring options.

When wiring to Increased Safety terminal

enclosures, you are only permitted to connect one

wire into each way on the terminal block, unless a

pair of wires are crimped into a suitable ferrule.

For the six-way terminal block wire sizes allowable

are 0.5mm² to 4.0mm²

Leads connected to the terminals shall be insulated

for the appropriate voltage and this insulation shall

extend to within 1mm of the metal of the terminal

throat. They shall only be installed and wired with

cable in an ambient temperature of -10°C to

+80°C.

All terminal screws, used or unused, shall be

tightened down to between 0.5 Nm and 0.7 Nm.

8) Testing unit operation

The break glass unit can be tested without the

need to break/replace the frangible glass element.

A test key is used to mechanically drop the glass

down activating the switch.

The test key is inserted in the test cam and rotated

clockwise by an angle of 60º the glass element will

visibly drop down in the viewable window.

The call point switch will now change over its

contacts to operate the alarm.

Once testing is complete the unit needs to be

reset, the test key is rotated back anticlockwise by

an angle of 60º back to its original position. The

glass element should now raise up so it is level

again in the viewable window.

1. 2. 3.

Insert test Hold in Rotate back

Key rotate position anticlockwise

clockwise during to reset

60º test

9) Replacement of glass element

If the break glass unit has been operated the

broken glass element can be quickly replaced.

The break glass cover plate is removed by

unscrewing the 4 off M4 cap head screws attaching

it.

Once the cover is removed the broken glass will be

free to be removed, clean out any other fragments

of glass carefully.

To fit the new glass element rotate the top cam

clockwise by an angle of 50º (use a 6mm Allen

key) this will than allow the glass to fit back into the

pocket it sits in, resting on the pivot point and test

cam, release the top cam to rest on the top of the

glass element.

Pivot point Test Cam Top Cam (rotate)

Replace the cover plate and tighten the 4 off M4

cap head screws.

Ensure the glass element is free to move under the

cover plate. This can be done by running through

the units test operation. See section 8 of this

instruction manual.

10) SIL 2 Reliability Data

Reliability and Functional safety IEC/EN61508

which has been assessed and is considered

suitable for use in low demand safety function:

• Random Hardware Failures and Systematic

Failures (route 2H)

• As an unvoted item (i.e. hardware fault tolerance

of 0) at SIL 2

The product was assessed against failure modes:

• Failure to close a contact when the call point is

struck with specified force

• Failure to open a contact when the call point is

struck with specified force

• Spurious output despite no input

Integrity in respect of failure to close

SIL 2

Total Failure rate

0.133 pmh

“hazardous” failure rate (revealed)

0 pmh

“hazardous” failure rate (unrevealed)

0.1 pmh

“safe” failure rate (revealed)

0.033 pmh

“safe” failure rate (unrevealed)

Diagnostic Coverage

99%

System type

Hardware Fault Tolerance

Safe Failure Fraction

>99%

PFD (hazardous failure)

1.25 x 10

-3

Proof Test Interval

Up to 1 year

Internal Earth

terminal

Ex e terminal

block

External

Earth Stud