_______________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH sales@e2s.com Tel: +44 (0)20 8743 8880
www.e2s.com Fax: +44 (0)20 8740 4200
Document No. IS 4601 Issue G 13-01-20
Sheet 1 of 6
INSTRUCTION MANUAL
IS-L101L
Intrinsically Safe LED Beacon
1. INTRODUCTION
The IS-L101L is an ATEX and IECEx certified intrinsically
safe beacon which will produce a visual warning in a
hazardous area. Red, Amber, Green and Blue output models
are available.
The beacon has been designed and certified to work alone or
in conjunction with a European Safety Systems IS-A105N
intrinsically safe sounder. The beacon may be powered from
the same intrinsically safe circuit as the IS-A105N intrinsically
safe sounder, allowing a combined audible and visual alarm
to be constructed. The IS-L101L beacon also contains an
alarm accept facility which allows an operator to silence the
sounder for a predetermined time while leaving the beacon
flashing or the sounder can be silenced after a predetermined
time period has elapsed.
When using the IS-L101L beacon with an IS-A105N
sounder, the Special Conditions for Safe Use in the
sounder certificate, Sira 04ATEX2301X must also be met.
2. DESCRIPTION
Fig 1 shows a simplified block diagram of a IS-L101L beacon.
The device will start to flash when power is applied to
ter and -. Terminals S+ and S- are for the connection
of an optional IS-A105N sounder which will operate
immediately power is applied to the beacon. The sounder
may be silenced for a predetermined time by momentarily
connecting the Ac.Sw terminals together. The silence time is
set by DIP switches 1 to 4 for time periods between 5
seconds and 2 hours.
By setting DIP switch 5 to ON the
sounder will silence after a preset time, but sound will
not be restored until the power to the beacon has been
removed and restored.
Setting DIP switch 6 to ON will
provide a 1 second reminder beep tone sound while the
sounder is silenced. The interval between the 1 second
reminder beep is dependent on the timing setting for the
silence period, (switches 1 to 4) see page 5.
When the
beacon is operated alone, without a sounder connected,
all of the DIP switches should be set to the OFF position.
When used alone, i.e. without a sounder connected, two flash
frequencies may be selected. With the Ac.Sw terminals
disconnected the beacon will produce two flashes in quick
succession once per second. The flash frequency can be
doubled by permanently connecting the Ac.Sw terminals
together.
When used with a sounder, the beacon produces two flashes
in quick succession once per second. When the sounder is
silenced the flash frequency is automatically doubled.
3. SUPPLY VOLTAGE
The IS-L101L beacon has been designed to operate in a
hazardous area via 28V 660mA 1.2W ATEX and IECEx
certified Zener Barriers or Galvanic Isolators. The beacon
may be tested or used in safe areas without a Zener Barrier
or Galvanic Isolator, but at supply voltages above 16V the
internal current limit will function and the brightness may be
reduced. The beacon should not be continuously operated
without a barrier or isolator with a supply voltage greater than
16V.
Current Limit
Sounder Silence and
Timing Circuits
Connection to
Optional IS-A105N
Sounder
S+
S-
+
-
Power
Supply
16V
LED's
Accept
Switch
Fig 1 Simplified block diagram
4. INTRINSIC SAFETY CERTIFICATION
4.1 ATEX certificate
The IS-L101L beacon complies with the following standards:-
EN IEC 60079-0:2018
EN60079-11:2012
The EC-Type Examination Certificate SIRA 04ATEX2302X
has been issued by the Notified Body Sira. This confirms
compliance with the European ATEX Directive 94/9/EC for
Group II, Category 1G equipment. The beacon carries the
Community Mark and subject to local codes of practice, may
be installed in any of the EEA member countries. This
instruction sheet describes installations which conform to
EN60079:Part14:2008 Electrical Installation in Hazardous
The IS-L101 beacon is CE marked for
compliance with the European Explosive
Atmospheres Directive 94/9/EC and the
European EMC Directive 89/336/EEC
II 1G Ex ia IIC T4 Ga (-40ºC <= Ta <= +60ºC)
