J.T.O. System GIC40N Installation instructions

Carbon monoxide detector GIC40N
Technical Specifications and User Guide
•Stationary electronic device for car-
bon monoxide detection
•Part of industrial and commercial de-
tection applications
•Use in small and medium-sized boiler
rooms, garages or various warehouses
and technology operations where CO
may occurs (for non-hazardous areas)
•Three levels of detection with separate
outputs
•Error output with the possibility of
connection to the alarm loop
PowerPower
ErrorError
Level ILevel I
Level IILevel II
Level IIILevel III
GIC40NGIC40N
J.T.O. System, s.r.o.J.T.O. System, s.r.o.
Made in Czech RepublicMade in Czech Republic
+12/24 V+12/24 V
GNDGND
IIII
IIIIII
II
L1L1
L2L2
The purpose of the detectors is to send a signal about the creation of a potentially
dangerous atmosphere for health. They use a heated semiconductor sensor for their
operation, which can react to the presence of many others flammable gases or vapors.
However, a special sensor control procedure achieves high sensitivity to CO with
reduced effect of other gases.
Detectors can be used individually or in groups of several pieces. Each detector
is separate unit requiring 12V or 24V DC power supply and its output is a two-state
signal showing whether the set concentration is, or is not exceeded. The detector
contains three separate outputs allowing monitoring up to three different concen-
tration levels. The output element for all levels is switching transistor with open
collector and indicators signaling exceeding the set level. Adjustment elements are
located on the electronics board, which allow selection of the desired level monitored
concentrations and control some properties of the detector. The user can thus select
the idle status of the output signal, its delay or the memory function for one of the
outputs.
GIC40N is ready to be fastened with screws to the designated place and it is
assumed to be regular on-the-spot checks.
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GIC40N – Technical Specifications and User Guide 2
Technical Specifications
Device Parameters
Detectable gas carbon monoxide
Signalling three-stage (three outputs)
Outputs open collector transistor (60 V / 0.3 A)
Auxiliary output relay (60 V=/0,6 A max)
Warm-up time 30 sec
Default signaling level (see
below for other settings)
100 ppm for level III, 50 ppm for level II and 30
ppm for level I
Maximum measuring
range
up to 250 ppm
Response / stabilization
time
max. 20 sec / max. 1 min
Delayed switching of out-
puts
optional 15 min averaging of values
Supply voltage 12 V= ±10% or 24 V= ±10%
Current consumption 90 mA max
Protection IP20
Weight about 250 g
Operation conditions -5 to 50◦C, 95 to 105 kPa, 5 to 95% RH
Working environment without the danger of explosion
Storage temperature -20 to 50◦C/ non-condensing humidity
Dimensions without hol-
der
115×103×40 mm
Detector connection multicore (3 to 7) cable, diameter 5 mm; for a
distance over 5 m use shielded cable
Constructed according to ˇ CSN EN 45544
Certificate VVU´ U a.s., ˇc. 358/D/2017
Usage Limitations
GIC40N detectors are designed to detect the presence of CO in a standard at-
mosphere. We do not guarantee correct detection at low or high oxygen concent-
ration. The use of the device in an environment where there may be special chemical
substances, e.g. those based on sulfur, arsenic, or phosphorus, can lead to the so-
called sensor poisoning. Possible applications in such environment must be consulted
with the manufacturer.
When the detector sensor is exposed to a concentration above the specified me-
asuring range, it returns to normal operation when the detector is placed in clean
air again. Recovery time is up to 2 minutes in the whole range of permitted climatic
conditions.
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GIC40N – Technical Specifications and User Guide 3
Detector Location
When the detectors are located in a building, we recommend following ˇ CSN EN
45544–4, which describes the Selection, installation, use and maintenance. The de-
tector should never be placed in locations where it may be affected by impurities
such as water (or color) droplets or oil vapors and it should never be exposed to
chemicals!
Function description
GIC40N detector uses a heated semiconductor sensor to detect gas. These sensors
are not selective, they react in the presence of various flammable substances in the
air. In order to achieve high sensitivity to CO and reducing the influence of other
substances, the sensor is controlled in periodic cycles and is additionally inserted in
front of the active layer carbon filter suppressing the effect of organic substances.
During operation, the sensor is first heated to a higher temperature for 3 seconds
(indicated by the green light LED) and then the ambient air is left at a lower tempe-
rature (green LED for this time off). At the end of the time with a lower temperature
the state of the sensor - ambient CO concentration - is evaluated. Depending on the
detected concentration and the set gas levels, it changes the corresponding output
(according to setting the corresponding switches - see below).
Detector Connection
The detector is connected to the detection system with several wires connected to
the screw terminal block on electronics board.
Marking Signal – use and meaning
+ Positive pole of the detector supply voltage. The superior control
system or the power supply e.g. NZ34, NZ34-DIN could be used
to power the detector. We recommend using surge protectors on
the mains supply to the system.
GND Common wire (ground). A wire with a reference potential for the
power supply and output signals.
I Stage I output. Switching (ON) at the concentration exceeding
the level I setting.
II Stage II output. Switching (ON) at the concentration exceeding
the level II setting.
III Stage III output. Switching (ON) at the concentration exceeding
the level III setting.
L1, L2 Output loop signaling detector failure. If everything is OK, ter-
minals L1 and L2 are connected. In the event of a fault, this loop
will be disconnected.
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GIC40N – Technical Specifications and User Guide 4
Detector power supply
The detector can be supplied with a voltage of 12 V = or 24 V =. There is no need
to do any adjustments for to supply 12 V and the detector can be connected directly.
For supply 24 V = the wire jumper located on the printed circuit board under the
resistor near the ”+“ terminal must be interrupted. Slightly bend the resistor to the
side and break the wire jumper with a sharp tool (splitting pliers). Then return the
resistor to its original position.
Output connection
Outputs III, II and I are used to signal that the concentration of level III, II or
I has been exceeded. All 3 outputs are connected as a transistor with an open
collector. They switch the load connected against + supply voltage. The terminals
are connected directly to the output transistor. There are no additional protection
circuits on the board. When switching eg inductive loads, an external protective
element must be used.
GIC40NGIC40N L1L1
L2L2
GIC40NGIC40N outputoutput
I/II/IIII/II/III
max. 60 V, 0,2 Amax. 60 V, 0,2 A
max. 75 V ac / max. 75 V ac /
35 V dc, 0,6 A35 V dc, 0,6 A
loadload
+Ucc+Ucc
GNDGND
RelayRelay
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GIC40N – Technical Specifications and User Guide 5
There are 2 more fault loop terminals located on the electronics board. The
switching element here is the contact relay. It is not necessary to observe the polarity
of the current flowing in the loop. The fault (disconnection of L1 and L2) is signaled
by the yellow LED. If the detector is without power the ”fault“ loop is open.
Control and signaling elements
Several elements are located on the electronics board to control the detector functions
and signal its status.
L2L2
TT GG
DD MM PP
ADJADJ
IIII
IIIIII
L1L1 IIIIII IIII II GNDGND ++
red LED IIred LED II
red LED IIIred LED III
red LED Ired LED I
ERRERR
ONON
II
IIII
IIIIII
24V24V
green LEDgreen LED
yellow LEDyellow LED
+12/24 V+12/24 V
GNDGND
IIII
IIIIII
II
L2L2
L1L1
Trimmers and jumpers for setting the monitored gas concentration. The setting
of the level of monitored gas concentration for individual stages is preset by jumpers
T / G to a fixed value or when using the T-jumper with trimmers. The following
table specifies concentration values 1:
Jumper T Jumper G Concentration I Concentration II Concentration III
[ppm] [ppm] [ppm]
Open Open 30 50 100
Short Open 30 trimmer II trimmer III
Open Short 30 60 150
Short Short trimmer II trimmer II trimmer III
The trimmer marked ADJ is intended for adjusting the sensitivity of the sensor.
Used only for setting detector using calibration gas (see Installation and inspection
of GIC40N detectors).
If jumper T is short and jumper G is open, the concentration selection for stages
II and III is made with trimmers. Each of these stages has a separate trimmer. When
turning the trimmer clockwise sets higher gas concentrations - see figure.
1For devices with firmware version 1.0 (devices manufactured before mid-2019), the limit con-
centration III is 120 ppm CO in the case of jumpers T and G open.
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GIC40N – Technical Specifications and User Guide 6
MAXMAX
MINMIN
The range of the whole trimmer corresponds to a concentration of 0 to 250 ppm.
When divided into 10 divisions, 1 division corresponds approximately a concent-
ration of 25 ppm.
In the case2of both jumpers T and G short, the concentration of I and II is the
same. It is set using trimmer II. The concentration of III is adjusted with trimmer
III. Trimmer ADJ is then used to set the range for trimmers II and III.
Output function selection jumpers
Jumper M allows you to set the memory function on output III. When the jumper
is short the output remains signaled presence of gas even after the gas concentration
falls below the set level. This status can be only canceled by switching off the supply
voltage or removing jumper M. If there is jumper open, output III monitors the
current state of concentration exceeded or not exceeded.
Jumper D sets the delayed response of outputs I and II. If short, the concentration
value is compared to the set limits calculated from a 15-minute weighted average.
So the detector averages the 90 values (15 minutes per 10 seconds) that were last
measured and this average value compares with the set appropriate limit. After start,
the internal memory of measured values is cleared. If jumper D is open, the outputs
react without delay at the same time as the corresponding signal light comes on
LEDs always when measuring the concentration state.
Jumper P reverses the idle state at output III. When the jumper is short, the
output transistor is closed and opens when the set concentration is exceeded. If the
jumper is open, the output transistor does not lead at idle and closes only when the
corresponding concentration is exceeded.
Indicator lights
The status of the detector is optically signaled by 5 LEDs with a diameter of 5 mm.
Green Detector is on, presence of supply voltage. The indi-
cator light blinks for a period of 10 seconds (On for 3
seconds and off for 7 seconds).
Red - I level Exceeding the set concentration for the stage I.
Red - II level Exceeding the set concentration for the stage II.
Red - III level Exceeding the set concentration for the stage III.
Yellow - error A fault in the sensor or electronics or an overload of the
detector sensor with a high concentration is signaled by
this indicator. If the detector is OK, the light is off.
2This mode is functional only from firmware version 1.2 (devices manufactured in the second
half of 2020 and later)
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GIC40N – Technical Specifications and User Guide 7
Connection examples
The following figure shows an example of a simple assembly for monitoring two (or
more) different places. Two (or there may be more) detectors are used together with
the NZ34 power supply. Four signal wires from detectors (+ 12V, GND, II and III)
are connected in parallel. Outputs II from the detectors are led to input I of power
source, outputs III to input II. When concentration II is exceeded, the relay responds
on terminals S1, A1, K1 in the source. When the concentration III is exceeded, the
relay connected to terminals S2, A2, K2 reacts.
The fault loop is connected to input III of the power source, which monitors the
correct function and sends a failure message.
The mains voltage of 230 V is supplied to the power supply. Relay outputs
LEVEL1 and LEVEL2 are ready to control actuators according to the needs of the
application.
L1L1 L1L1
L1L1L1L1
TT TT
GG GG
DD DDMM MMPP PP
ADJADJ ADJADJ
IIII IIII
IIIIII IIIIII
L2L2 L2L2
L2L2L2L2
IIIIII IIIIII
IIIIIIIIIIII
IIII IIII
IIIIIIII
II II
IIII
GNDGND GNDGND
GNDGNDGNDGND
++ ++
++++
ERRERR ERRERR
ONON ONON
II II
IIII IIII
IIIIII IIIIII
24V24V 24V24V
++ ++ II IIII IIIIII D1D1 D2D2 S-S- S+S+
33
22
11
33
22
11
IPIP
DELDEL
B+B+
MEMMEM
RL1RL1 RL2RL2 RL3RL3
A1A1 A2A2 A3A3
//
K1K1
//
K2K2
//
K3K3
S1S1 S2S2 S3S3
NN LL
TT
8080
mAmA
MDMD
NZ34 (NZ34-DIN)NZ34 (NZ34-DIN)
Higher conc.Higher conc.
Jumper IP3 shorted!Jumper IP3 shorted!
+Ucc+Ucc
GNDGND
Lower conc.Lower conc.
ErrorError
230 V/50 Hz230 V/50 Hz Level 1Level 1 Level 2Level 2 ErrorError
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GIC40N – Technical Specifications and User Guide 8
Another example is the connection of a detector to a control system that requires
potential free switching inputs. The detector is powered from a 24V= source. Relays
with a 24V coil are connected to its outputs. Relay coil is always bridged by a
protection diode. The relay contacts can then be on or off according to control
system requirement. The output contacts are connected directly to the inputs of the
control system.
L1L1
TT GG
DD MM PP
ADJADJ
IIII
IIIIII
L1L1
Wire jumperWire jumper
cut!cut!
L2L2 IIIIII IIII II GNDGND ++
ERRERR
ONON
II
IIII
IIIIII
24V24V
L2L2
Alarm loopAlarm loop
IIIIII
REL3REL3 REL2REL2 REL1REL1
GNDGND
+24V+24V
IIII II GNDGND ++
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GIC40N – Technical Specifications and User Guide 9
Installation and inspection of GIC40N detectors
Installation procedure
1. Screw the detector to the designated place using screws through the holes in
the metal holder. Recommended position (due to dust) is the sensor down. The
location of the detector must not be moisty and must be avoid contamination of
the detector sensor with any substances (eg oil, petrol, paint, vapors solvents,
etc.). Install detectors in the building when all welding and painting have been
completed! We do not place detectors in close proximity to magnets, such as
those contained in speakers, etc.
2. Unscrew the upper cover of the detector.
3. Before connecting, check the supply voltage and the load connected to the
detector. E.g. when the load is activated, measure the magnitude of the con-
nected voltage with a voltmeter against the GND and ammeter connected to
GND the amount of current flowing through the load.
4. Pass the cable with connecting wires through the bushing. Connect appropriate
wires to the terminal block signals as shown (without voltage) and tighten the
bushing.
5. Screw on the detector cover.
6. We turn on the power. When operating correctly, the green indicator will light
for 3 seconds and then go off for 7 seconds. This process must be repeated
periodically. The yellow light must be off in normal operation.
7. After at least 5 minutes, we will perform a functional check of the detector to
verify the correctness of detector connection into the system.
GIC40N detector check
When inspecting the detector, it is necessary to ensure stable conditions under which
the inspection is performed. For stabilization operating state, the detector must be
switched on at least 15 minutes before the start of the inspection. If the detector was
long time without power, it is advisable to leave the detector on for several hours in
a clean environment (eg 10 hours without gas). It is also advisable to turn off the
memory with jumper M and jumper D. The detector can be checked as follows:
Functional check:
This check determines whether the detector responds to the presence of CO in the
air. For inspection can be used a test ampule with a smoke stick that is supplied to
inspect any new J.T.O. System, s.r.o. CO detector. Take the stick out of the ampule,
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GIC40N – Technical Specifications and User Guide 10
light it and let it smoke like a cigarette. Move smoking stick in to a distance of about
5 cm so that the rising smoke passes around to the sensor. Within about 30 seconds
must activate all detector stages and the system response must follow. If jumper D
is short, only stage III is activated.
Check with calibration gas:
To check the monitored levels, it is necessary to provide a mixture of calibration gas
with the required concentration (in the range of 100 to 200 ppm CO) or mix desired
concentration in the space around the sensor.
Calibration procedure
Procedure when using a permanent magnet
1. Verify that the detector is turned on long enough before the actual calibration.
After switching off in a few days it needs to be stabilized for at least 3 hours.
With a longer switch-off time, the stabilization time is extended (shutdown 1
month - stabilization at least 10 hours, shutdown several months - stabilization
at least 2 days).
2. Move the permanent magnet closer to the side of the detector box on the side
of the lights. Switch to calibration mode is indicated by short flashes of the
green light when it would be off in normal operation.
3. A calibration gas of known concentration is introduced around the detector
sensor. If a flow meter is available, set the flow to 0.5 l / min. Allow the sensor
to stabilize in the gas for at least 1 minute.
4. Set the ADJ trimmer on the electronics board so that the 2 LEDs for stage
I and II flash signaled the currently used concentration. The concentration is
signaled by the number of flashes of these red lights in the period between the
green lights coming on. The concentration is then determined by calculation:
Concentration in ppm = number of flashes of the II indicator light ·100 +
+ number of flashes of the I indicator light ·10
Example: The red LED II flashes 1×and at the same time the red LED I flashes
4×. The concentration is 140 ppm (1·100 + 4·10).
5. After the inspection, the detector must be ventilated in clean air for at least 5
minutes.
J.T.O. System, s.r.o., 1. 9. 2020 TD–GIC40N–1.2