Whilst every effort has been made to ensure the accuracy of this specification, Sontay cannot accept responsibility for damage, injury, loss or
expense resulting from errors or omissions. In the interest of technical improvement, this specification may be altered without notice.
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GS-S-CO-LED
Issue: 5.0
Date Of Issue: 19/12/2011
© 2011 Sontay Limited. All rights reserved.
Relay jumpers
J2 J1
1 2 3 4 5 6
RS485 A (Opt
io
nal
)
RS485 B
(Opt
io
nal
)
Rel
ay
C
Rel
ay
NO
0V
24V
ac
/dc
Technical Overview
LED Indication
The GS-S-CO-LED has 6 LED indicator lights which change
colour based upon concentration levels. This allows for easy
visual awareness of the CO levels, with either a relay or
RS485 interface output.
Installation
1. Select a location on a wall of the controlled space which
will give a representative sample of the prevailing room
condition.
Avoid sitting the sensor in direct sunlight, near
diffusers and steam sources.
2. Gently remove the front cover from the back plate. The
front plate is removed by pressing the tab at the top of
the sensor with a flat bladed screwdriver. Gently slant
the screwdriver and this will separate the front cover
from the back plate.
3. Using the base as a template mark the hole centres and
fix to the wall with suitable screws. Alternatively the
base plate can be mounted on to a conduit box or a
standard recessed back box.
4. Feed cable through the knockout in the base of the
housing and terminate the cores at the terminal block.
Install wiring into terminal blocks as required, and push
excess wire back into wall or junction box.
5. Select the relay switching point using jumpers J1 & J2.
6. Ensure that the supply voltage is within the specified
tolerances.
7. Replace the front cover to the base plate until a click is
heard.
8. Power the unit, pre-commissioning checks can be made
after 10 minutes. Full commissioning should not be
carried out for at least 36 hours.
9. It is recommended that screened cable be used and that
the screen should be earthed at the controller only. Care
should be taken not to lay control signal wiring in close
proximity to power or other cables which may produce
significant electromagnetic noise.
1st Green LED
<20ppm
1st & 2nd Green LED’s
>20ppm
1st Yellow LED
>50ppm
1st & 2nd Yellow LED’s
>100ppm
1st Red LED
>200ppm
1st & 2nd Red LED
>300ppm
Relay Jumper Settings
The default jumper position is 100ppm
Connections
CO Value
ON
OFF
J1 = OFF J2 = OFF
50ppm
>55ppm <45ppm
J1 = OFF J2 = ON
100ppm >105ppm <95ppm
J1 = ON J2 = OFF 300ppm >305ppm <295ppm
J1 = ON J2 = ON
500ppm >505ppm <495ppm
Status
Jumpers
