GASTRON GTC-200A User manual

GTC-200A
Instruction Manual
Headquarters / Engineering research laboratory :
23 Gunpo Advance d Industry 1-ro(Bugok-dong), Gunpo-si, Gyeonggi-do
Tel [phone] Fax [phone]
Yeongnam business office / Plant :
55 Gonghangap-gil 85beon-gil, Gangseogu, Busan Metropolitan City
Tel [phone] Fax [phone]
E-mail : [email protected]
www.gastron.com
Read in detail for correct use.

When abnormalities occur after purchasing the product,
please contact the following address.
·Address : 23 Gunpo Advanced Industry 1-ro,
Gunpo-si, Gyeonggi-do
·Tel : [phone]
·Fax : [phone]
·URL : www.gastron.com
·e-mail : [email protected]
Gas & Flame
Detection System
GTC-200A
Instruction Manual
www.gastron.com
02_03
We sincerely thank you for purchasing the product of Gastron Co. Ltd.
Our Gastron Co.Ltd. is a company specialized in Gas detector and Gas Monitoring System, being
recognized by many consumers due to the best quality and use convenience. We always enable you
consumers to find desired products nearby and are ceaselessly studying and striving for development
of Gas detectors satisfying customers. From now on, solve all anguishes concerning Gas detector with
the products of Gastron Co. Ltd, We Gastron Co. will take a responsibility and give you satisfaction.
In the present instruction manual, operation method for Gas detector as well as simple methods for
maintenance and repair, etc. are recorded If you read it in detail and keep it well, for reference when
you have questions, then it will give you much help.
* KOSHA GUIDE : P-135-2013
Calibration should be executed at periods required by the manufacturer, and should be executed in every quarter
unless there are separate calibration periods.
The present product and the product manual can be changed without advance notice for performance improvement and
use convenience of the product.
■ For accurate operation of Gas detector, check up and calibrate for more than once in every 6 months.
( * See No. 13 of KOSHA GUIDE : P-135-2013 / 8.3 paragraph on qualification and calibration)
■ For accurate operation of Gas detector, checkup and calibration with calibration gas before measurement
is recommended.
■ When not calibrated, it may cause malfunction of the equipment due to problems resulting from Sensor aging.
■ When the present instrument should be dismantled, those with professional skills for Gas detector should
conduct the operation.
■ For power supply cable, wire specifications should be determined by referring to the item of "Length of
installed cable".
■ For the contents on checkup and calibration of Gas detector, please use our company's engineering
department , e-mail, or web site.
Greetings

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04_05
ContentsContents
GTC-200A
Instruction Manual
1. Overview ·························································································· 6
2. Features ··························································································· 6
3. Specifications for channel card ···································································· 6
3.1. Common Alarm Unit ··········································································· 6
3.2. Channel Control Unit ·········································································· 7
3.3. Power Unit (Option) ··········································································· 7
3.4. Environmental Specifications ··································································· 8
4. Specifications for Wall Mount product ······························································ 8
5. Name and description of each part ································································ 9
5.1. Configuration and description of Power unit ····················································· 9
5.2. Configuration and description of warning unit (Common unit) ······································ 10
5.3. Configuration and description of channel unit (Channel unit) ······································ 12
5.4. Configuration and description of Wall mount type ················································ 14
6. Installation ························································································· 16
6.1. Power supply and signal configuration for Channel Unit ·········································· 16
6.2. Power supply configuration for Wall Mount Type ················································· 17
6.3. Configuration of channel Unit terminal ··························································· 18
6.4. How to connect 3 wire type Gas detector ······················································· 19
6.5. How to connect 2 wire type Gas detector ······················································· 19
7. How to operate Power unit ········································································· 20
8. How to operate Common Unit ······································································ 21
8.1. Function ····················································································· 21
8.2. RS485 MODBUS Interface ····································································· 22
8.2.1. Communication setting ·································································· 22
8.2.2. RS485 MODBUS communication setting and Register ······································ 22
9. How to operate Channel Unit ······································································ 23
9.1. Power ON ···················································································· 23
9.2. Gas Measuring Mode ········································································· 23
9.3. Test Mode ··················································································· 24
9.4. Checkup mode (Stand-by Mode) ······························································ 24
9.5. Operation setting ············································································· 25
9.5.1. PROGRAM MODE ······································································ 25
9.6. ALARM Mode ················································································ 27
9.7. Maintenance Mode ··········································································· 29
10. Outline drawing and Dimensions ··································································· 31
10.1. Power unit ··················································································· 31
10.2. Common Unit ················································································· 31
10.3. Channel Unit ················································································· 32
10.4. Panel mount type ············································································· 33
10.5. Wall mount type(Power Unit applied) ···························································· 34
10.6. Wall mount type(Power Unit not applied)························································· 35
11. Revision record ···················································································· 36

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06_07
3. Specications for channel card
GTC200A Series is ammeter that adopted high-performance A/D Converter and Micro-Process with diversified
functions embedded. GTC200A Series is configured in centralized style, comprised of a Common alarm unit and a
Multi-Channel control unit for several detectors, with the Multi channel control unit being connected to each detector.
GTC200A Series is protected by the case of DIN Type, and has 2 types of products such as Panel mount type, Wall
mount type, etc. GTC200A Series has the display function of FND Digital display (PV Value) and the display function of
3-color LED Bar Graphic display (PV and Alarm set value) embedded, accompanied by 3 Instant alarm functions (1st
H/L, 2nd H/L, 3rd H/L) and Trouble alarm.
3.2. Channel Control Unit
ITEMS SPECIFICATION
Input form Analog 4-20mA
Measurement display 4-Digit FND & Bar-graph (32 segment, 3-color LED)
Measuring range 0.000 to 9999 Digital (Arbitrary setting by the user)
Measuring accuracy FND Digital ±1% Full Scale
LED Bar ±1% Full Scale
Input measuring period 100 ms
Alarm setting 3-stage alarm (Arbitrary setting by the user)
Alarm setting display 3 Color bar graphic (Green/Red/Yellow LED)
Alarm display LED bar graphic
Alarm clearing Manual (Common unit)
Self diagnosis Test switch & Reset switch
Control input, output RS-485
Measured output Analog 4-20mA
Alarm output
Breakdown alarm SPDT Relay dry contact signal output
Alarm 1 SPDT Relay dry contact signal output
Alarm 2 SPDT Relay dry contact signal output
Alarm 3 SPDT Relay dry contact signal output
Relay dry contact capacity : AC250V/3A, 30V/3A
Operation power supply DC 24V / 100mA Max
3.3. Power Unit (Option)
ITEMS SPECIFICATION
Input power supply DC. 24V
Output power supply DC. 24V (reserve power supply : DC. 27V / 300mA)
Output power supply display FND Digital display
Main power supply display Green LED display
reserve power supply display Green LED display
reserve power supply monitoring Red LED display
reserve power supply test Test switch for preliminary power switch
reserve power supply Ni-Cd Battery 24V / 600mA(less than 6 circuits)
Upon occurrence of Instant alarm and Trouble alarm, GTC200A Series is displayed as Audible(Buzzer) and
Visual(Alarm LED and Bar graphic LED flashing), and has Max. PV Value holding functions upon occurrence of an
alarm. GTC200A Series allows remote control for alarm clearing, and can perform interlocked control functions as it
has the output for alarm (SPDT Contact). Common alarm unit of GTC200A Series is supplying communication output
(Isolation type RS-485 : Option) to configure Monitoring system such as Gas vision, etc. while each Channel control
unit is supplying outputs for measured values (4~20mA. DC). GTC200A Series is configured with the latest parts,
being equipped with stability and reliability, and is capable of the maximum Expansion (Max. 63 channels) in a given
space.
2. Features
1. Overview
GTC-200A
Instruction Manual
3.1. Common Alarm Unit
ITEMS SPECIFICATION
Input form RS-485
Input measuring period 100ms
Alarm display Audio signal- Audible(Buzzer) and Visual signal- Visual(LED)
Alarm clearing Return switch- Manual (Reset switch)
Control input Outside input(Remote reset) - Buzzer stop/ return function
Measured output Isolation RS-485 modbus(Option)
Alarm output
Buzzer - Buzzer SPST Relay dry contact signal output
Breakdown alarm - SPDT Relay Dry contact signal output
1st alarm - Alarm 1 SPDT Relay dry contact signal output
2nd alarm - Alarm 2 SPDT Relay dry contact signal output
3rd alarm - Alarm 3 SPDT Relay dry contact signal output
* Relay dry contact capacity : AC125V 10A
Operation power supply DC 24V / 100mA Max
■ No. of Channel units for the maximum access to a common unit is 63ea.
Input form
Measurement display
Measuring range
Measuring accuracy
Input measuring period
Alarm setting
Alarm setting display
Alarm display
Alarm clearing
Self diagnosis
Control input, output
Measured output
Alarm output
Operation power supply

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08_09
3. Specications for channel card
4. Specications for Wall Mount product
GTC-200A
Instruction Manual
5.1. Configuration and description of power supply unit
ITEMS SPECIFICATION
Input power supply AC 110V/220V 50/60Hz (basic AC220V 50/60Hz)
Specification with
SMPS application per Channel
(For SMPS specifications of the installed
product, checking of specifications for SMPS
Inside product is required, since specifications
on the right side can be changed upon
manufacturing)
Channel configuration Upon application of
0.5A to detector
Upon application of
0.2A to detector
3(4) Channel 24V / 3.2A(2.4A) 24V / 1.7A(1.4A)
5(6) Channel 24V / 4.6A(3.9A) 24V / 2.4A(2.1A)
7(8) Channel 24V / 6.0A(5.3A) 24V / 3.2A(2.8A)
9(10) Channel 24V / 7.5A(6.8A) 24V / 3.9A(3.5A)
( ) is basic applied quantity and capacity for the type with Power unit not applied.
Alarm display Audio signal- Audible(Buzzer) and Visual signal- Visual(LED)
Alarm clearing Return switch- Manual (Reset switch)
Control input Outside input (Remote reset) - Buzzer stop / return function
Measured output Isolation RS-485 modbus(Option)
Backup power unit(Option) 24V DC/600mA
24V DC/1300mA
Approval CE, KR, KFI
3.4. Environmental Specifications
ITEMS SPECIFICATION
Operation Temperature -20 to 60 ℃
Storage Temperature -20 to 60 ℃
Operation Humidity 5 to 99% RH (Non-condensing)
Pressure Range 90 to 110KPa
No ITEMS SPECIFICATION
1Front cover case Power Unit front-face Cover
2Main body case Power Unit main Body
3Acrylic Acryl for protection of Power Unit front-face cover
4Front sub cover Power Unit front-face Sub cover
5Main body fixed bracket Bracket for fixing of Power Unit
6Main/Battery power display Main power supply voltage and battery voltage are displayed
Voltages of power supply supplied to Common unit and channel unit are displayed
7Main power LED LED light for main power supply is turned on when AC power supply is used, while it is
turned off when reserve power supply is used
8Battery power LED LED for reserve power supply is lighted when reserve power supply is used rather than AC
main power supply is used.
9Battery power good LED Lighted when voltage of preliminary power voltage is normal above 1.8V after being
connected.
10 Battery power trouble LED Lighted when preliminary voltage is below18V, and blinks if the reserve power supply was
not connected.
11 Battery power test key
It is a switch for testing whether reserve power supply operates normally. While the switch
is being pushed, voltage of the reserve power supply is applied to operate the gas leakage
alarm. At this time, voltage of the reserve power supply is displayed in FND.
[Figure 1. Configuration of power supply unit]
5. Name and description of each part

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10_11
[Table 1. Description on configuration of power supply unit]
5. Name and description of each part
GTC-200A
Instruction Manual
[Figure 2. Configuration and description of alarm unit]
[Table 2. Description on configuration of alarm unit]
5.2. Configuration and description of alarm unit (Common unit)
No ITEMS SPECIFICATION
12 Battery power ON/OFF switch
on/off switch for preliminary power switch.
Note1) It is turned off upon shipment of product
Note2) The preliminary power switch should be turned on after main power supply is turned on.
13 Front cover screw Screw for fixing of Power Unit
14 Terminal PCB Power Unit Terminal PCB
15 Terminal PCB screw Screw for fixing of Power Unit Terminal PCB
16 DC input connector Input connector for power supply of Power Unit
17 Battery connector Input connector for reserve power supply of Power Unit
18 DC output connector Voltage output connector for operation of channel card
NO NAME DESCRIPTIONS
1Front cover case Front-face Cover for Common unit
2Main body case Front-face main Body for Common unit
3Acrylic Acryl for protection of front-face cover for Common unit front-face
4Front SUB cover Front-face Sub cover for Common unit front-face
5Main body fixed bracket Bracket for fixing of Common unit
6Buzzer Operates as intermittent sound of each upon occurrence of Alarm and trouble in each
channel.
7Power LED Power LED is lighted when power is inputted in Common unit
8Trouble LED Trouble LED is lighted when trouble occurred in each channel unit.
Ex) Upon occurrence of defective wire connection with detector and of abnormality
9Alarm-3 LED
Alarm 3 LED is lighted upon occurrence of the 3rd alarm in each channel unit. Alarm 3 LED
is lighted when the 3rd alarm value is reached upon execution of test functions in each
channel
10 Alarm-2 LED
Alarm 2 LED is lighted upon occurrence of the 2nd alarm in each channel unit. Alarm 2 LED
is lighted when the 2nd alarm value is reached upon execution of test functions in each
channel.
11 Alarm-1 LED
Alarm 1 LED is lighted upon occurrence of the 1st alarm in each channel unit. Alarm 1 LED
is lighted when the 1st alarm value is reached upon execution of test functions in each
channel.
12 Communication LED (Channel)
Normal communication is realized with entire channel units set in Common unit, COM-
CH LED continues to be lighted, while COM-CH LE blinks when there is a Channel unit
without realization of communication. (When No. of Channel units is set as less than 1 ea. In
Common unit, it blinks at an interval of 0.5sec.)
13 Communication LED (PC)
When communication DATA transmitted from PC is normally received in Common unit,
COM-PC LED is immediately turned off after being lighted once.
(When Common unit address is set as less than 1ea. In Common unit, it blinks at an interval
of 0.5sec.)
14 Buzzer stop LED
As an alarm occurs in Channel unit, buzzer operates, and buzzer stops when Buzzer stop
switch is pushed. At this time, BZ-STOP LED is lighted, When Buzzer stop switch is pushed
once more in Common unit or Channel unit, BZ-STOP LED is turned Off. (However, it is
lighted only when Alarm type was set as hold in Channel unit
15 Buzzer Stop/Reset key
It is the key used for Buzzer stop and Reset when Trouble and Alarm occurred in each
channel unit.
Push once initially.... Buzzer sound is stopped and BZ-STOP LED is lighted.
Push twice consecutively.... As BZ-STOP LED is turned Off, Reset function of all channel
units in Latch state according to Alarm setting is executed.
16 Power ON/OFF switch Power ON/OFF switch for Common unit .
17 Front cover screw Screw for fixing of Common unit
18 Terminal PCB Common Unit Terminal PCB
19 Terminal PCB screw Screw for fixing of Common Unit Terminal PCB
20 Connector Input connector for signals
5. Name and description of each part

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GTC-200A
Instruction Manual
NO NAME DESCRIPTIONS
1Front cover case Front-face Cover for Channel control unit
2Main body case Main Body for Channel control unit
3Acrylic Acryl for protection of front-face cover for Channel control unit
4Front sub cover Front-face Sub cover for Channel control unit
5Main body fixed bracket Bracket for fixing of Channel control unit
6FND display Measured values of detector connected to each channel are continuously displayed,
and user designated values are displayed in blinking state upon execution of test function.
7Power LED When Power is Inputted in Channel unit, Power LED is lighted.
8Check LED STD-BY LED blinks in the case of detector checkup mode.
9Trouble LED Trouble LED is lighted when trouble occurs in channel unit and detection unit.
Ex) When defective wire connection with detector and abnormality occur
10 Alarm-3 LED Alarm 3 LED is lighted when the 3rd alarm occurs in channel unit. Alarm 3 LED is lighted
when the 3rd warning value is reached upon execution of test function of the channel unit.
NO NAME DESCRIPTIONS
11 Alarm-2 LED Alarm 2LED is lighted when the 2nd alarm occurs in channel unit. Alarm 2 LED is lighted
when the 2nd warning value is reached upon execution of test function of the channel unit.
12 Alarm-1 LED Alarm 1 LED is lighted when the 1st alarm occurs in channel unit. Alarm 1 LED is lighted
when the 1st warning value is reached upon execution of test function of the channel unit.
13 3 color bar graphic LED
3 Color bar graphic LED continuously shows, display of measured value and of alarm
setting value as in FND display.
Bar graphic LED is lighted as green when the measured value is less than the 1st alarm,
as orange when it is more than the 1st alarm and less than the 2nd alarm, as red when it is
more than the 2nd alarm.
When the measured value is more than the alarm setting value, Bar graphic is held at the
highest value, and Bar graphic is displayed in blinking state for the alarm.
14 Reset key It performs functions such as Alarm clearing of Channel unit, clearing of Self test, clearing of
Program setting, etc.
15 Down key
After selection of each mode using Func.key, arbitrary values can be selected by using
"▲", "▼" Key. When "▲", "▼" Key is pushed for a given time in the mode requiring frequent
changes of setting values, the setting values are changed fast.
16 Test key
When Test switch is pushed, the mode executing self diagnosis function is entered into.
It is the key where the measured value FND blinks, checking of Alarm operation state in
Channel unit and Common unit by adjustment of blinking measured values is possible by
using "▲" key or "▼" key.
For clearing of diagnosis, clearing occurs by pushing once the Reset key in each Channel unit.
17 Function key
Function key is the key that inputs data values by conversion and selection of functions such
as setting of warning values. Setting of alarm method, setting of Dead band for alarm, etc.
18 Up key
After selection of each mode using Func.key, arbitrary values can be selected by using
"▲", "▼" Key. When"▲", "▼" Key is pushed for a given time in the mode requiring frequent
changes of setting values, the setting values are changed fast.
19 Power ON/OFF switch Power ON/OFF switch for Channel unit.
20 Front cover screw Screw for fixing of Channel unit
21 Terminal PCB Channel Unit Terminal PCB
22 Terminal PCB screw Screw for fixing of Channel Unit Terminal PCB
23 Connector Output connector for signals
[Figure 3. Components of channel unit]
[Table 3. Description on components of channel unit]
5.3. Configuration and description of concentration display unit (Channel unit)
5. Name and description of each part 5. Name and description of each part

NO NAME DESCRIPTIONS
1Wall mount case front Front-face case of Wall mount Type
2Wall mount case rear Rear-face case of Wall mount Type
3Wall mount case cover Terminal cover of Wall mount Type
4Power unit (option) Unit used upon using reserve power supply (Battery), being provided as an Option.
5Common unit Common Unit displaying control and alarm signals of channel unit
6Channel unit Channel Unit displaying the measured values by being connected with detection unit
7Mother board filter PCB (option) PCB applied and mounted only upon use of Power unit, protecting the circuit from
electromagnetic waves, noise, surge, etc.
8Mother board common PCB Output terminal for relay contact such as buzzer, breakdown, alarm, etc. is provided
9Mother board channel PCB Connection for detection unit as well as output terminal for current of 4~20mA and output
terminal for relay contact such as alarm etc. are provided.
10 Name plate Product name of Wall mount Type is displayed
11 DIN case fixed bracket Bracket for fixing of individual cards
12 Case cover screw Screw for fixing of terminal cover
NO NAME DESCRIPTIONS
13 Front case fixed hook Hook for fixing of front-face case cover
14 Wall mount fixed hole Hole for fixing of Wall mount Type
15 Main power switch Power supply switch of Wall mount Type
16 Power supply Power supply device
17 Battery (option) Battery for reserve power supply
18 Battery cover (option) Battery Cover for reserve power supply
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GTC-200A
Instruction Manual
[Table 4. Components of wall mount]
[Table 5. Description on components of wall mount]
5.4. Configuration and description of Wall mount type
5. Name and description of each part 5. Name and description of each part

6.1. Power supply and signal configuration for Channel Unit 6.2. Configuration of power supply for Wall Mount Type
■ Configurations of channel Unit, Common Unit and power Unit are as shown in the following figure, where the
channel unit allows configuration of 63 ea.
■ Unfasten the fixing chain for front case on the left side of Wall mount ,and open the front case to input power
supply in the circuit breaker for wiring positioned on the bottom left side inside the case.
■ Power supply in use is AC110V or 220V, and is set and released for the voltage in use requested upon product
ordering, and shipped by being set at AC220V unless there is a separate request.
■ Power unit is mounted only when the reserve power supply (Battery) is used.
■ When the Power unit is not used, DC24V is directly connected to Connector(CN6) of Common unit in Power
supply for use. (Power unit is provided as an option.)
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6. Installation6. Installation
GTC-200A
Instruction Manual
[Figure 4. Power supply and signal configuration for channel card]
[Figure 5. Configuration of power supply for Wall Mount]

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GTC-200A
Instruction Manual 6. Installation6. Installation
6.3. Configuration of channel Unit terminal
[Figure 6. Configuration of
Channel Unit terminal]
NO NAME DESCRIPTIONS
1Output 4-20mA + 4-20mA output of measured values for detection unit
2Output 4-20mA -
3TROUBLE RELAY NO
Output Relay for breakdown state4TROUBLE RELAY NC
5TROUBLE RELAY COM
6Warning3 RELAY NO
Output Relay for 3rd alarm7Warning3 RELAY NC
8Warning3 RELAY COM
9Warning2 RELAY NO
Output Relay for 2nd alarm10 Warning2 RELAY NC
11 Warning2 RELAY COM
12 Warning1 RELAY NO
Output Relay for 1st alarm13 Warning1 RELAY NC
14 Warning1 RELAY COM
15 Detector Power Supply + Supply power to detection unit and
input 4-20mA signals
16 Detector 4-20mA Input
17 Detector Power Supply -
6.4. How to connect 3-wire type Gas detector
■ When power supply for gas detector and 4-20mA output are configured as 3-wire (V+, mA, V- ), connect to
the Channel Unit by the following method.
■ Connecting cable should be configured with shield cable of CVVS or more than CVVSB.
[Figure 7. Connection method for 3-wire gas detector]
■ Our company's detector models of the relevant method include TS-1100Ex, TS-2000Ex, TS-2100 Series,
TS-4000 Series, TS-4100P Series, TS-5100 Series, GTD-1000 Series, GTD-2000 Series, GTD-3000 Series,
and GIR-3000 Series.
6.5. How to connect 2-wire type Gas detector
■ When the output for gas detector is configured with 2-wires (V+, V- ), connect to the Channel Unit by the
following method.
■ Connecting cable should be configured with shield cable of CVVS or more than CVVSB 1.5sq.
■ Our company's detector models of the relevant method include TS-1100Tx, TS-2000Tx, TS-3000 Series, and
TS-3100 Series.
[Figure 8. Connection method for 2-wire 3 gas detector]

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GTC-200A
Instruction Manual
8.1. Functions
■ Voltage of the main power supply is displayed by figures in FND Digital display.
■ When the checkup key for reserve power supply is pushed, the power supply is
converted to the reserve power supply, the voltage of which is displayed by figures
in FND Digital display.
■ When the reserve power supply is not connected, the breakdown LED for reserve
power supply blinks at an interval of 0.5 sec.
■ When the reserve power supply is more than18V, the normal LED for reserve power
supply is lighted, while the breakdown LED for reserve power supply is lighted when
it is less than 18V.
Note1) It is turned off upon shipment of product.
Note2) Turn on the switch for reserve power supply after turning on the main power supply.
NO FUNCTION DESCRIPTION
1Buzzer alarm
When breakdown signals are sent from the Channel unit, alarm sound occurs as a short
intermittent sound.
When alarm signals are sent from the Channel unit, alarm sound occurs as a long
intermittent sound.
2Breakdown/alarm LED It is an LED lighted when breakdown signals or alarm signals are sent from the Channel unit,
where the alarm LED blinks during alarm maintenance time.
3Communication LED
COM-CH LED shows a state of communication between Common unit and Channel unit,
and is turned off after being lighted for about 0.1 sec upon communication once. Thus,
when normal communication occurs as many as the No. of channel units set in the Common
unit, continuously lighted state is maintained (Channel unit access time is 0.1sec).
When communication DATA transmitted from PC is normally received in the Common unit,
COM-PC LED is immediately turned off after being lighted once.
When SW1and SW2 are set in the Common unit as less than 1 ea. 1it blinks at an interval of
0.5 sec(COM-CH/ COM-PC LED).
4Buzzer-Stop LED
As an alarm occurs in the Channel unit, buzzer operates. When Buzzer stop switch is
pushed. The buzzer is stopped, at which time BZ-STOP LED is lighted (However, it is
lighted only when Alarm type was set as hold in the Channel unit).
When the Buzzer stop switch is pushed once more in Common unit or channel unit, BZ-
STOP LED is turned Off.
5Buzzer stop and
Reset key
It is a key used for Buzzer Stop and Reset when Trouble and Alarm occurs in each Channel
unit.
Push once initially.... Buzzer sound is stopped and BZ-STOP LED is lighted.
Push twice consecutively.... As BZ-STOP LED is turned Off Reset function of all channel
units in Latch state according to Alarm setting is executed.
8. How to operate Common Unit7. How to operate Power unit

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9.1. Power ON
■ Check wire connections of operation power supply, with detection unit, between alarm unit and channel unit.
■ Turn ON the power supply switch after checking input power supply.
■ Check that "SELF" is displayed in FND.
9.2. Gas Measuring Mode
■ When there is no abnormality in SELF TEST after Power ON, the following gas measuring state is automatically
entered into.
When the power supply is turned ON for Channel unit, "SELF" blinks in FND of the channel unit for
15sec, and breakdown alarm occurs when abnormality occurs in detection unit.
- Gas concentration value received from the detector is displayed as figures in FND Digital display.
- 3 Color Bar graphic LED displays gas concentration, in green when the concentration is less than
the 1st Alarm, in orange when it is more than the 1st Alarm and less than the 2nd Alarm, and in red
when it is more than the 2nd Alarm.
- The setting value for the stage 3 Alarm is constantly displayed by 3 Color bar graphic LED, in green
for the 1st Alarm value, in orange for the 2nd Alarm value, and in red for the 3rd Alarm value.
- When the detector is not connected or has abnormality, the characters of "Undr" are displayed by
blinking at an interval of about 0.5 sec.
- Trouble LED lamp is lighted.
- Circular LED at the most bottom among 3 Color bar graphic LED is lighted in red.
- When the current value inputted from the detector is higher than the set High Scale by 10%, the text
of "Ouer" is displayed by blinking at an interval of 0.5 sec.
- Circular LED on the topmost among 3 Color bar graphic LED's is lighter in red.
- When the gas concentration value is recognized to be more than the Alarm setting value, the relevant
Alarm function counts the alarm maintenance time so that Alarm function is operated if it is more than
the Alarm maintenance time.
- While the Alarm maintenance time is being counted Alarm LED Lamp blinks at an interval of 0.5sec,
and is lighted when it becomes more than the Alarm maintenance time.
- Alarm relay is turned ON after more than the Alarm maintenance time is elapsed.
- If the Alarm latch type is in "on" mode, Alarm state and gas concentration value are maintained at the
maximum value when Alarm function is operated, and is not cleared even though the gas
concentration falls below the Alarm value, and must always be cleared by using "Reset" key.
- When the Alarm latch type is in "off" mode, the Alarm function is automatically cleared according to
gas concentrations.
8.2.1. Setting for communication
8.2. RS485 MODBUS Interface
■ Baud rate : 9600BPS
■ Stop bit : 1 Stop
■ Parity : Even parity
8.2.2. Setting for RS485 MODBUS communication and Register
NO FUNCTION NAME ADDRESS OTHER
1Concentration value for Channel-1 unit 30001 Address increased by 1 at
each time per Channel unit.
2Concentration value for Channel-2 unit 30002
nConcentration value for Channel-n unit 30xxx
■ Concentration value for Channel unit (Analog input)
[Table 6. Register of concentration values for channel Unit RS485]
NO FUNCTION NAME ADDRESS OTHER
Channel-1 unit
State data for Alarm1 10001
8Bit each assigned per
1 Channel unit
State data for Alarm2 10002
State data for Alarm3 10003
State data for
breakdown 10004
State data for checkup 10005
Preliminary data 10006~10008
Channel-2 unit
State data for Alarm1 10009
8Bit each assigned per
1 Channel unit
State data for Alarm2 10010
State data for Alarm3 10011
State data for
breakdown 10012
State data for checkup 10013
Preliminary data 10014~10016
Channel-n unit State data 10001+((n-1)*8) ~ 10001+(((n-1)*8)+8)
■ Bit data for Channel unit state (Data for reading of data input contact)
[Table 7. Register of state for channel Unit RS485]
9. How to operate Channel Unit8. How to operate Common Unit

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9.5. Setting for operation
9.5.1. PROGRAM MODE
9.3. Test Mode
■ When there is no abnormality in SELF TEST after Power On, the following state of gas measurement is automatically
entered into.
- When "▲", "▼" keys are simultaneously pushed for more than 2sec in the display state of gas
concentration.
- When 10sec passes after the last key operation in program setting function, the display state of gas
concentration is returned to.
- The setting message for position of decimal point as the 1st function of setting functions for program
data is displayed as "dP-S".
- When "Func" key is pushed, the setting function for decimal point is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- Decimal point is sued when there is a need for change according to the measuring range.
When position of the decimal point is set, position of the decimal point is changed to 3 types as
shown on the left side whenever"▲" key or "▼" key is pushed.
- If "FUNC" is pushed when the desired position of decimal point is displayed, the position of the decimal
point is set and the next item is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- The message for setting of High scale as a function for setting the maximum value of gas
concentration display is displayed as "H-SL".
- When "Func" key is pushed, the setting function for High scale is entered into.
- When "Reset" key is pushed,, the concentration display mode is returned to.
- High scale value is set for the range specified by domestic regulations upon product shipment.
- The setting value for High scale value can be changed according to the measuring range, and the
Scale value is increased or decreased whenever "▲" key or "▼" key is pushed.
- If "FUNC" is pushed when the desired High scale value is displayed, the High scale value is set and
the next item is entered into. When "Reset" key is pushed, the concentration display mode is returned to.
- The present setting mode shall be set for the same measuring range as detection unit upon factory
shipment.
Ex) When Range was set for 100
Upon inputting of 4 mA.DC................... 0 Display
Upon inputting of 20 mA.DC................... 100 Display
- When "Test" key is pushed for more than 2sec in the display state of gas concentration, Test mode
is entered into.
- When 30 min is elapsed in the Test mod after the last key operation, the display state for gas
concentration is automatically returned to.
- It is a function allowing test in the Channel unit without injection of detector sensor gas while the figure
of gas concentration is displayed by blinking upon entering into the Test mode. When the user pushes
"▲" key or "▼" key , an arbitrary gas concentration value can be set, and the Alarm function is
normally operated with the concentration value designated by the user.
- When "Func" key is pushed for more than 2sec, FND/LED/Bar LED test function is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
-
It is the Test mode for FND/LED/Bar LED, where FND figure is displayed as 4-digit figure and overall
display (8888)are displayed at an interval of 0.5 sec, and 4-digit figure displays setting values for PC
Add(SW1) and CH CNT(SW2) of the Common unit.
- 3 Color bar graphic LED alternatingly displays green, orange and red at an interval of 0.5sec, and
each function LED blinks at an interval of 0.5sec.
- When "Func" key is pushed, the mode where normal operation of communication of Channel unit with
Common unit is checked is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- It is the mode for checking of Channel unit where communication with Common unit is normally
operated, and the No. of Channel unit where normal communication is realized is sequentially displayed
at an interval of 0.5sec.
- If there is a channel unit No. where all of the No. of Channel units set in Common unit is not displayed
and omitted, it becomes a Channel unit with no communication.
- When "Func" key is pushed, the gas concentration Test function is returned to.
- When "Reset" key is pushed, the concentration display mode is returned to.
9.4. Checkup mode (Stand-by Mode)
- When "▼(Standby)" key of Channel unit is pushed for more than 2sec in the display state of gas
concentration, the checkup mode is entered into.
- In checkup mode ,The checkup mode is cleared and the display state of gas concentration is
returned to only when "▼(Standby)" key is pushed in Channel unit.
- In the locking mode, It is a mode where all remaining functions operate as STD-BY LED blinks while
output of Trouble/Alarm relay contact for Common unit and Channel unit does not operate .
- When "▼(Standby)" key is pushed, the concentration display mode is returned to.
▼ ▲
9. How to operate Channel Unit9. How to operate Channel Unit

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- The message for setting function of SAD value as a function to compensate errors for measured
values occurring in detection unit is displayed as "SAd ".
- When "Func" key is pushed, the setting function for SAD value is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- It is a function for setting of SAD value, and the SAD value is increased or decreased whenever
"▲" key or "▼"key is pushed . In the case of negative (minus) value, "-" symbol is displayed by being
added onto the first figure.
- If "FUNC" key is pushed when the desired SAD value is displayed, the SAD value is set, and the next
item is entered into.
- When "Reset" key is set, the concentration display mode is returned to.
Ex) When SAD was set as 2: When the output error in detector is -2, Display displays the SAD
setting value as 0 after calibration of 2, although actual display should indicate -2.
- The message for setting of Channel number as a function for setting of recognition No. of Channel
unit is displayed as "CHno ".
- When "Func" key is pushed, the setting function for Channel number is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- Channel No is a mode where Channel unit address is inputted so that operation situation of each
Channel unit can be checked, and Address NO.value is increased or decreased whenever"▲" key
or "▼" key is pushed.
- If "FUNC" is pushed when the desired Address NO is displayed, the Address NO value is set and
Alarm reset type function as the next item is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
Note1) Unless Channel No.is inputted, communication between Channel unit and common unit does
not occur
Note2) For Channel No, mutually different numbers should always be inputted.
9.6. ALARM Mode
■ When "Func" key is pushed for more than 2sec in the display state of gas concentration, the setting function for
alarm value data is entered into.
■ When 10sec passes after the last key operation in the setting function for alarm value, the display state for gas
concentration is automatically returned to.
- The message for setting function of Alarm latch type as a function for setting of Alarm latch type is
displayed as "LACH".
- When "Func" key is pushed, the setting function for Alarm latch type is entered into.
- When "Reset" key is set, the concentration display mode is returned to.
- It is a mode for changing Alarm reset type, where "" on" and " oFF" modes are changed whenever
"▲" key or "▼" key is pushed.
- If "FUNC" key is pushed when the desired Alarm latch type is displayed, the Alarm latch type is set
and the next item is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- Alarm latch type has 2 modes of " on" and " oFF" ,where the Alarm is automatically Reset in OFF mode
while Alarm is reset only when the user makes sure to push Reset key for clearing.
- The message for setting function of Alarm1 value as a function for setting of Alarm 1 value is
displayed as"AL-1".
- When "Func" key is pushed. The setting function for Alarm1 value is entered into.
- When "RESET" key is pushed, the concentration display mode is returned to.
- Alarm level is set for the concentration specified by domestic regulations upon product shipment.
- It is a function for changing the setting value for Alarm1, where the maximum values is possible up to
the High scale value, and the Alarm value is increased or decreased whenever "▲" key or "▼" key is
pushed.
- If "FUNC" is pushed when the desired Alarm 1 value is displayed, the Alarm1 value is set and the next
item is entered into.
- When "RESET" key is pushed, the concentration display mode is returned to.
- It is a mode for setting the direction for operation of Alarm1, where"1H "or "1L " is displayed whenever
"▲" key or "▼" key is pushed.
- "1H " mode is the mode operating when it is larger than or the same as the setting value for Alarm1,
while "1L " mode is the mode operating when it is smaller than or the same as the setting value for
Alarm1.
- If "FUNC" key is pushed when the desired mode is displayed the mode is set and the next item is
entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- Alarm type has flammability set upon factory shipment as 1H and 2H and 3H / oxygen: 3H and 2L
and 1L / toxicity: 1H and 2H and 3H Type.
▼ ▲
Full Range
9. How to operate Channel Unit9. How to operate Channel Unit

- When "TEST" and "RESET" keys are simultaneously pushed as "SELF" is blinking after power supply
ON, the setting function for Maintenance is entered into.
- When "Reset" key is surely pushed in Maintenance mode, the display state for gas concentration is
returned to.
- It is a mode for selecting the function to set current input value and output value as the reference for
Alarm
- Channel unit, and ""-In-"or "-oUt" is displayed whenever "▲" key or "▼" key is pushed.
- If "FUNC" is pushed when the desired mode is displayed, the relevant mode is entered into.
- When "-In-" was selected, we have the mode for setting current input value, while it is mode for
setting current output value when "-oUt" was selected.
- When "Reset" key is pushed, the concentration display mode is returned to.
- It is the case where "-In-"was selected, as a mode for setting by inputting 20mA current, and the
message is displayed as "IA20".
- When "Func" key is pushed, the function for displaying current input value as figures is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- The message for setting function of Alarm1 blink output as a function for setting of ON/OFF function
for Alarm1 contact output at an interval of 1 sec while the buzzer is operating is displayed as "A1bL".
- When "Func" key is pushed, the setting function for Alarm1 blink output is entered into.
- When "RESET" key is pushed, the concentration display mode is returned to.
- It is a mode to change the Alarm1 blink output, where " on"과 " oFF" modes are changed whenever
"▲" key or "▼" key is pushed.
- If "FUNC" key is pushed when the desired mode of Alarm1 blink output is displayed, the mode of
Alarm1 blink output is set and the next item is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- Alarm1 blink output has 2 modes of " on" and " oFF" , where Alarm1 blink output is not operated in oFF
mode while Alarm1 blink output is operated in on mode.(However, it is operated when the mode of
Alarm1 contact output is on.)
- Both the 2nd alarm(Alarm2) and the 3rd alarm (Alarm3) have the same menu structure.
- The message informing completion of setting function is displayed as "End" for 2sec, and the display
state of gas concentration is returned to.
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9.7. Maintenance Mode
- It is a mode for setting Dead band value for operation of Alarm1, and the value is increased or
decreased whenever "▲"key or "▼" key is pushed.
- When Alarm1 is in "1H " mode, Alarm 1 operates below the Alarm 1 value minus Dead band value,
while Alarm1 is cleared above the Alarm 1 value plus Dead band value when it is in “1L” mode .
- If "FUNC" key is pushed when the desired value of Alarm1 Dead band is displayed, the value of
Alarm1 Dead band is set and the next item is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- As the concentration value is reached near the setting value for Alarm, Alarm continues On/Off.
This function is a function for giving hysteresis value to remove such phenomenon, and it is set for
0 upon factory shipment.
- Ex) When the alarm setting value is 20%LEL / Dead band: 2%LEL, the alarm occurs at 22% LEL
based on 20%LEL, and is cleared at 18%LEL.
- The message for setting of Alarm 1 delay time as the function for setting of Alarm 1 delay time is
displayed as "AL1t".
- If "Func" key is pushed, the setting function for Alarm1 delay time is entered into.
- When "RESET" key is pushed, the concentration display mode is returned to.
- It is a function to prevent occurrence of instantaneous malfunction in detector due to external impact
and effects of noise rather than normal operation, and Alarm 1 delay time is increased or decreased
by the unit of second whenever "▲" key or "▼" key is pushed.
- "FUNC" key is pushed when the desired Alarm 1delay time is displayed, the Alarm1 delay time is set
and the next item is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- Ex) The alarm based on 20%LE occurs when the measured value of more than the alarm setting
value exists for more than 5 sec in the case of Alarm setting value: 20% LEL / Delay time: 5 sec,
while the alarm does not occur when the value is lowered below the alarm setting value within 5 Sec.
- The message for setting of Alarm1 contact output as a function for setting Alarm 1 contact output is
displayed as "A1rl".
- When "Func" key is pushed, the setting function for Alarm1 contact output is entered into..
- When "Reset" key is pushed, the concentration display mode is returned to.
- It is a mode to change Alarm1 contact output, where " on "and "oFF" modes are changed whenever
"▲ key or "▼" key is pushed.
- If "FUNC" key is pushed when the desired mode for Alarm 1 contact output is displayed, the mode for
Alarm1 contact output is set and the next item is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- Alarm1 contact output has 2 modes of " on" and "oFF" where Alarm1contact output does not operated
in oFF mode and is operated in on mode.
▼ ▲
■ Both the 2nd alarm and the 3rd alarm have the same menu structure.
9. How to operate Channel Unit9. How to operate Channel Unit

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- It is a mode where the value transformed in the process is displayed by figures after inputting 20mA
current in (mA) terminal.
- "Func" key is pushed when the displayed figures re stable, the input value for current is set, and the
next item is entered into.
- When "Reset" key is pushed, the concentration display mode is returned to.
- It is the case of selecting "-Out" and the next mode after input current. It is the mode for setting of 4mA
output current, 7 the message is displayed as "A-04".
- If "Func" key is pushed when the ammeter accurately displays 4mA by pushing "▲" key or "▼" key
while watching the ammeter after connecting the ammeter to output terminal of 4~20mA, the output
current value is set and the next item is entered into.
- When "RESET" key is pushed, the concentration display mode is returned to.
- It is a mode for setting 20mA output current, and the message is displayed as "A-20".
- If "Func" key is pushed when the ammeter accurately displays 4mA by pushing "▲" key or "▼" key
while watching the ammeter after connecting the ammeter to output terminal of 4~20mA, the output
current value is set and the next item is entered into.
- When "RESET" key is pushed, the concentration display mode is returned to.
- The message informing completion of the setting function is displayed as "End" for 2sec,
7 the concentration display mode is returned to.
10.1. Power unit
10.2. Common Unit
[Figure 9. Outline drawing of Power Unit]
[Figure 10. Outline drawing of Common Unit]
10. Outline drawing and Dimensions9. How to operate Channel Unit

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10.4. Panel mount type10.3. Channel Unit
[Figure 12. Outline drawing of Panel mount]
[Figure 11. Outline drawing of Channel Unit]
[Table 8. Dimension according to setting for Panel Mount channel]
CHANNEL A(MM) B(MM) CHANNEL A(MM) B(MM)
1 Channel 108 107 6 Channel 288 287
2 Channel 144 143 7 Channel 324 323
3 Channel 180 179 8 Channel 360 359
4 Channel 216 215 9 Channel 396 395
5 Channel 252 251 10 Channel 432 431
Power Unit is optional, and the width of 36mm for Power unit should be subtracted from the above dimension
when only Common unit and Channel unit are sued.
Ex) When Power unit is not used in the case of 5 Channel, A is 216mm(252mm-36mm), and
B becomes 215mm(251mm-36mm)
10. Outline drawing and Dimensions10. Outline drawing and Dimensions
Upon mounting of
Panel 2 stage,
Cut-out spacing shall be
more than 30mm at least.

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10.5. Wall mount type(Power Unit applied)
[Figure 13. Outline drawing of Panel Mount (Power Unit not applied)]
[Table 9. Dimension per channel of Wall Mount Type(Power Unit not applied)]
Channel A(mm) B(mm) Channel A(mm) B(mm)
3 Channel 218 147 7 Channel 361 291
5 Channel 289 219 9 Channel 433 363
Note1) Basic types include 4 types above, and Wall mount of other different sizes is for separate order specifications.
10.6. Wall mount type(Power Unit not applied)
[Figure 14. Outline drawing of Panel Mount(Power Unit applied)]
[Table 10. Dimension per channel of Wall Mount Type(Power Unit applied)]
Channel A(mm) B(mm) Channel A(mm) B(mm)
4 Channel 218 147 8 Channel 361 291
6 Channel 289 219 10 Channel 433 363
Note1) Basic types include 4 types above, and Wall mount of other different sizes is for separate order specifications.
10. Outline drawing and Dimensions10. Outline drawing and Dimensions

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Version Contents Date
0.0 Manual revised initially 2011. 06. 27
1.0 Font changed, typo corrected 2016. 10. 27
11. Revision record