_______________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH www.e2s.com Tel: +44 (0)208 743 8880
Document No. D202-00-011-IS Issue 3 25-08-2023 Sheet 8 of 8
The optional Ex d LED monitoring module is fitted in
the M20 side entry as shown, when the main M20
entries are at the bottom of unit.
The wiring is shown as per wiring diagrams D202-06-
211or D202-06-212 see the various LED configuration
options.
Ex d LED
Position
16) Maintenance, Overhaul, Repair and
Cleaning
Maintenance, repair and overhaul of the equipment should
only be carried out by suitably qualified personnel in
accordance with the current relevant standards:
For ATEX / IECEx / UKEx
EN 60079-19
Explosive atmospheres – Equipment
IEC 60079-19
repair, overhaul and reclamation
EN 60079-17
Explosive atmospheres – Electrical
IEC 60079-17
installations inspections and maintenance
Electrostatic charging hazard – clean only with a damp cloth.
Units must not be opened while an explosive atmosphere is
present.
For US & CEC Class / Div / Zone
UL 60079-19
Explosive atmospheres - Equipment repair,
overhaul and reclamation
UL
60079-17
Explosive atmospheres - Electrical
installations inspection and maintenance
17) 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
System Type
A
Hardware Fault Tolerance
0
Safe Failure Fraction (credible claim)
75%
PFD (hazardous failure)
2.3 x 10
-3
Proof Test Interval
Up to 1 year
