E2S BExCP3C-PB User manual

European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [e-mail] Tel: [phone]
Document D150-00-155-IS Issue 1 26-08-2020 Sheet 1 of 3 www.e2s.com Fax [phone]
BExCP3C-PB
Manual Call Point – Push Button
With resistor Modules
For use in Flammable Gas and
Combustible Dust Atmospheres
1) Introduction
The BExCP3C-PB is a push button 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 up to two of the following:
 Monitoring resistors up to 1.5W per module
 Monitoring diode
 Monitoring Zener diode
The units are Group II, EPL (equipment protection
level) Gb. The equipment is certified ‘Ex db eb mb
IIC T4 Gb’ and as such may be used in Zones 1
and 2 with flammable gases and vapours with gas
groups IIA, IIB & IIC and temperature classes T1,
T2, T3 and T4.
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 & Marking
All units have a rating label, which carries the
following important information: -
Unit Type No.:
BExCP3C-PB Manual Call Point
Input Voltages:
Important: See section 7.1 for current ratings
125VDC Max 0.5A Max. Resistive Load;
0.03A Max Inductive Load
75VDC Max 0.75A Max
48VDC Max 1.0A Max
24VDC Max 5.0A Max Resistive Load;
3.0A Max Inductive Load
12VDC Max 5.0A Max
6VDC Max 5.0A Max
Code:
BExCP3C-PB
Ex db eb mb IIC T4 Gb
Ex tb IIIC T75ºC Db
IP66
–40ºC <= Ta <= +65ºC
Certificate No.:
SIRA 09ATEX3286X
IECEx SIR 09.0121X
Epsilon x: II 2GD
CE Marking
Notified body No. 2813
Year/Serial No. i.e. 20/1CP3CPB000001
WARNING - DO NOT OPEN WHEN AN
EXPLOSIVE ATMOSPHERE MAY BE PRESENT
3) Type Approval Standards
The beacon 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
BExCP3C-PB -40oC to +65oC
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
Potting Compound of resistors where used: Epoxy
Resin
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.
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.
INSTRUCTION MANUAL
BExCP3C-PB Push Button Manual Call Point
F
o
r use in Flammable Gas
a
nd Dust Atmos
p
here
s

European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [e-mail] Tel: [phone]
Document D150-00-155-IS Issue 1 26-08-2020 Sheet 2 of 3 www.e2s.com Fax [phone]
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 an earth
clamp which will stop the cable twisting. This
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.
Internal Earth
terminals External
Earth Stud
Ex e terminal block
Note: Depending on options chosen an 8-Way DIN
Rail or 6-Way terminal block may be selected.
7) Cable connections
There are 3 off cable entry holes suitable for
M20x1.5 Ex e approved cable glands or stopping
plugs with a minimum ingress protection of IP66.
The unit can be wired in a number of different ways
depending on the resistor combination selected.
Refer to wiring schematic D150-06-051 for detail.
EOL (End of line) device:
resistor – ExxxR / diode – ED1 / zener – ExxxZ
Series (In line) device:
resistor – SxxxR / diode – SD1 / zener – SxxxZ
Microswitch 1 = M/S 1
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. For the 8-way DIN rail wire
sizes allowable are 0.5mm² to 2.5mm²
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.
Voltage
option
Max
Voltage
Min resistor value
allowable in module
Type C unit (1.5W)
6 V dc 6 V dc 27 ohms
12V dc 12 V dc 110 ohms
24V dc 24 V dc 430 ohms
48V dc 48 V dc 1K8 ohms
Table 1
7.1) Current Limitations
The maximum allowable current is determined as
the smallest value from the following scenarios:
1. When both module resistor values are the
same as or above the minimum range of
values shown in table 1, the current is not
further limited.
However, when either resistor value is lower
than those shown in table 1, the current must
be limited to the values given in table 2.
Voltage
option
Max
Voltage
Max current when
resistor values lower
than minimum
6 V dc 6 V dc 250m
A
12V dc 12 V dc 125mA
24V dc 24 V dc 62mA
48V dc 48 V dc 31mA
Table 2
For example, if a 24V DC unit is fitted with a
series resistor of 270 ohms, the maximum
current of the unit would be reduced to 62mA
since the resistance is less than the minimum
430 ohms allowable at this voltage.
E2S recommends a minimum resistor value
of 100 ohms for a Series device and 180
ohms for an EOL device fitted to a 24V unit.
2. If a diode module is pre-fitted as either an
EOL or Series Device, the following current
limitation applies:
Unit Voltage Max. Diode Current
48V DC 0.75A
6, 12 & 24V DC 2.0A
3. If a Zener diode module is pre-fitted as either
EOL or Series device, the following current
limitation applies:
Zener
Volta
g
e
Max. Input
Volta
g
e
Max. Current
3.3V
56V DC
230mA
4.7V 162mA
5.1V 149m
A
5.6V 136mA
6.2V 122m
A
6.8V 112mA
10V 76m
A
12V 63mA
8) Testing unit operation
The push button unit can be tested without the
need to replace any element.
To test, lift the cover lift flap to reveal the push
button. The button should be pressed into the body
to activate the unit and place it into the operated
condition.
The call point switch will now change over its
contacts to operate the alarm.
Once testing is complete the unit needs to be reset
from the operated condition.
Rotate the push button anticlockwise by an angle
of 55º, see guide alignment marks on button and
cover, shown below (1). The push button should
pop back up to its original position.
Ensure that the push button has also twisted back
clockwise by 55º to its original position see guide
marks on button and cover, shown below (2).
The unit is now reset.
1. On operated unit 2. Button should pop
Twist push button up and twist back to
Anticlockwise 55º original position
to reset
Note: use alignment
marks circled to
indicate the push
button’s status
/position.
Unit currently shown
as ‘standby
condition’
Resetting an operated unit is the same as resetting
a tested unit.

European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [e-mail] Tel: [phone]
Document D150-00-155-IS Issue 1 26-08-2020 Sheet 3 of 3 www.e2s.com Fax [phone]
9) 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) 0
DiagnosticCoverage 99%
Systemtype A
HardwareFaultTolerance 0
SafeFailureFraction >99%
PFD(hazardousfailure) 1.25x10‐3
ProofTestInterval Upto1year