E2S BExS110D-SIL Instruction manual - page 7
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European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH sales@e-2-s.com Tel: +44 (0)208 743 8880
www.e-2-s.com Fax: +44 (0)208 740 4200
Document No. D197-00-601-IS Issue F 16-06-17 Sheet 7 of 19 (7)
14) SIL 2 Instruction/Safety Manual
Figure 7 - The SIL 2 Module monitors the Sounder and interfaces to the customer plant.
Warning
– To maintain the integrity of the SIL 2 units the system must be installed in accordance with this manual. Any deviation
could result in failure of the SIL 2 system and an unintended unit operation or function.
Warning
– Unit must be installed, commissioned and used within the parameters outlined in this manual. Failure to comply with
this will result in potential unit failure within the system.
Warning
– The unit must be powered in either Standby or Active modes to comply with the SIL 2 approval requirement.
Warning
– If the power is disrupted the unit must be allowed to go through the commissioning cycle to reset, if this does not
happen and the power continues to be disrupted the unit will latch the fault and require a hard system reset.
Warning
– Only SIL 2 approval tones can be used to comply with the SIL 2 approval requirement. See SIL approved tone
selection table in section 15.
SIL 2 System Description
The E2S BEx range of IECEx & ATEX compliant signaling
devices with integrated SIL 2 fault monitoring modules.
The SIL 2 module monitors the function of the device and
provides feedback to the control panel. A fault condition can
be communicated via independent fault contacts or by the
introduction to the monitoring circuit of an end of line resistor.
A SIL 2 system wiring for fault detection in standby and active
mode
– 4 wire installation can be seen as per section 18.1. A
SIL 2 system wiring for fault detection in standby and active
mode
– 2 wire installation can be seen as per section 18.2.
The new SIL 2 version of the E2S BExS110-SIL alarm horn
sounder and BExBG05-SIL, BExBG10-SIL & BExBG15-SIL
Xenon strobe beacon are designed, tested and certified,
bringing plant safety to new levels.
Key benefits:
•
Signaling device function is checked and
automatically reported to the control panel.
•
Eliminates the need for time consuming physical
inspections.
•
Increased plant safety, confidence that all devices
are fully functioning.
•
Designed to integrate seamlessly into your SIL 2
environment.
15) SIL 2 System Terms and Function
The SIL 2 Sounder Unit Monitors
•
Standby mode and Active mode
•
Health status of power supply
•
Sounder correct function and tone pattern
The SIL 2 sounder operates as part of a SIL 2 system.
The sounder will after commissioning remain powered in
Standby mode (reverse polarity) until the sounder is required
to operate. When the signaling device is required to operate
the polarity is changed to normal supply and the sounder will
go into Active mode where it will start to sound the correct
tone. When testing the system and sounders operation the
system is put into Active mode.
The customer PLC will control whether the system is in either
of the main two operational modes.
Standby Mode
– This is where the power supply polarity is
reversed so negative (
–ve) is feed to the positive (+) sounder
terminal and positive (+) is feed to the negative (
–ve) sounder
terminal.