E2S BExCP3B-PB User manual

European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: [phone]
Document D150-00-151-IS Issue 5 26-08-2020 Sheet 1 of 3 www.e2s.com Fax [phone]
BExCP3B-PB, BExCP3D-PB &
BExCP3E-PB
Manual Call Point –Push Button
With resistor Modules
For use in Flammable Gas and
Combustible Dust Atmospheres
1) Introduction
The BExCP3B-PB/ BExCP3D-PB/ BExCP3E-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 series and/
or EOL devices:
•Monitoring resistors per module: -
•BExCP3B-PB - 2.0W Max
•BExCP3D-PB - 1.0W Max
•BExCP3E-PB - 1.75W Max
•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 T60ºC Db’ (BExCP3B-PB),
‘Ex tb IIIC T80ºC Db’ (BExCP3D-PB),
‘Ex tb IIIC T75ºC Db’ (BExCP3E-PB)
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.:
BExCP3B-PB Manual Call Point
BExCP3D-PB Manual Call Point
BExCP3E-PB Manual Call Point
Input Voltages:
48VDC nominal 56VDC Max 0.75A Max
24VDC nominal 28VDC Max 5.0A Max Resistive
Load; 3.0A Inductive Load
12VDC nominal 15VDC Max 5.0A Max
6VDC nominal 9VDC Max 5.0A Max
Code:
BExCP3B-PB
Ex db eb mb IIC T4 Gb
Ex tb IIIC T60ºC Db
IP66
–40ºC <= Ta <= +50ºC
BExCP3D-PB
Ex db eb mb IIC T4 Gb
Ex tb IIIC T80ºC 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. 20/1CP3BPB000001
Or 20/1CP3DPB000001
Or 20/1CP3EPB000001
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
BExCP3B-BG -40oC to +50oC
BExCP3D-BG -40oC to +70oC
BExCP3C-BG -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.
INSTRUCTION MANUAL
BExCP3B-PB, BExCP3D-PB & BExCP3E-PB Push Button 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.
BExCP3E-PB
Ex db eb mb IIC T4 Gb
Ex tb IIIC T75ºC Db
IP66
–40ºC <= Ta <= +65ºC

European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: [phone]
Document D150-00-151-IS Issue 5 26-08-2020 Sheet 2 of 3 www.e2s.com Fax [phone]
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
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
The unit can be wired in a number of different ways
depending on the resistor combination selected.
For detail, refer to wiring schematic D150-06-051.
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
Voltage
option
Max
Voltage
Min resistor
value
allowable in
module
Type B unit
(2.0W)
Min resistor
value
allowable
in module
Type D unit
(1.0W)
Min resistor
value
allowable
in module
Type E unit
(1.75W)
6 V dc
9 V dc
47 ohms
91 ohms
51 ohms
12V dc
15 V dc
120 ohms
240 ohms
150 ohms
24V dc
28 V dc
470 ohms
820 ohms
510 ohms
48V dc
56 V dc
1K8 ohms
3K3 ohms
2K0 ohms
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
7.1) Fitted LED, Diode or Zener Diode
If a diode module is pre-fitted as either an EOL or
series device, the following current limitation
applies:
Unit Voltage
Max. Current
48V DC
0.75A
6, 12 & 24V DC
2.0A
If a Zener diode module is pre-fitted as either EOL
or Series device, the following current limitation
applies:
Zener
Voltage
Max. Input
Voltage
Max. Current
3.3V
56V DC
230mA
4.7V
162mA
5.1V
149mA
5.6V
136mA
6.2V
122mA
6.8V
112mA
10V
76mA
12V
63mA
In any scenario, the lowest value of maximum
current should be used. For example, if the unit
has both a diode and a Zener diode, the Zener
diode would determine the maximum input current
of the unit, since its max. current is lowest.
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 [email protected] Tel: [phone]
Document D150-00-151-IS Issue 5 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