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European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH www.e2s.com Tel: +44 (0)208 743 8880
Document No. D202-00-211-IS Issue 5 16-12-2022 Sheet 6 of 7
Series (In line) device;
resistor – SxxxR
diode – SD1
zener – SxxxZ
LED
Fig 8a -PT Version Push Action
To reset, insert the reset tool supplied with the unit into the 2-
off holes in the button plate, rotate clockwise along the
curved slots and then pull the button plate back up. Rotate
the tool anti clockwise and remove through the 2-off holes in
the button plate.
13) End-of-Line and Series Devices
All models can be fitted with series resistors, end-of-line
monitoring resistors, monitoring diodes and zener diodes if
supplied with direct current up to 48Vdc and limited to a
maximum total power consumption no greater than 6.224W.
Min. resistor values and current limitations must be observed
depending on supply voltage and type of components fitted. If
a combination of resistors / diodes / zener diodes is used,
values for all components must be observed and lowest
current limit for either component becomes overall limit.
Current limitation for units fitted with end-of-line resistors,
diodes or zener diodes must be ensured by using a current
limited power supply or fitting a current limiting resistor at the
control panel (not provided).
The following table 1 shows limitations for all possible
variations:
Note: - The maximum voltage stated must not be exceeded,
as the internal resistor modules are rated as compliant with
Ex d according to the unit voltage.
If lower value resistors than seen on table are required it may
be possible to configure but seek advice from E2S to ensure
compliance is still maintained.
EOL (End of line) device;
resistor – ExxxR
diode – ED1
zener – ExxxZ
Microswitch 1 = M/S 1
Microswitch 2 = M/S 2
The unit can be wired with a maximum of 4 module devices –
see wiring schematic D202-06-211
When customer is fitting EOL or Series devices, ensure
device leads are insulated or routed so as not to create an
electrical short.
14) Maintenance, Overhaul & Repair
Maintenance, repair and overhaul of the equipment should
only be carried out by suitably qualified personnel in
accordance with the current relevant standards:
EN60079-19/IEC60079-19
Explosive
atmospheres
-
Equipment repair, overhaul and reclamation
EN60079-17/IEC60079-17
Explosive
atmospheres
-
Electrical installations inspection and maintenance
To avoid a possible ELECTROSTACTIC CHARGE the unit
must only be cleaned with a damp cloth.
Units must not be opened while an explosive atmosphere is
present.
Supply voltage 24Vdc
Supply voltage 48Vdc
Type of
component
fitted
value
Max. current
(mA)
value
Max.
current
(mA)
End-of-Line
Resistor
*See note
min. 470R/
2W or min.
2k2/ 0.5W
3000
min. 2k2/
2W or
min. 8k2/
0.5W
1000
End-of-Line
Diode
Type
1N5401
2W
59.13
2W
25.26
Series
Resistor
*See note
min. 470R/
2W or min.
2k2/ 0.5W
3000
min. 2k2/
2W or
min. 8k2/
0.5W
1000
Series
Diode
Type
1N5401
2W
59.13
2W
25.26
Series
Zener
Diode Type
1N5333B
3.3V
230
3.3V
230
4.7V
162
4.7V
162
5.1V
149
5.1V
149
5.6V
136
5.6V
136
6.2V
122
6.2V
122
6.8V
112
6.8V
112
10V
76
10V
76
12V
63
12V
63
