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GTC-540
Instruction Manual
No
ITEMS
SPECIFICATION
1
Case cover
It is made of ABS Material. It fixes the display and protects the circuit from surrounding
environment and external shock.
2
Case body
It is made of ABS Material. It fixes the Main PCB and protects the circuit from surrounding
environment and external shock.
3
Marking label
Upon an event of error, the warning light turns on.
4
Mount hole(2-Ø6.5)
It is a hole to fix the control unit to an external wall or other mount plate.
5
Concentration Display
(FND Digital Display)
6 holes each of Ø16.5 and Ø 20.5 are set at the bottom part. Depending on site condition, power
and signal cables, etc. are connected by cable inlet.
6
O-Ring < NBR>
It works as waterproofing material to prevent rainwater from entering inside.
7
Power LED
When power is inputted, the power LED lights on.
8
Stand-by LED
When the detector is in stand-by mode, STD-BY LED flickers.
9
Trouble LED
Upon an event of trouble in receiver unit and detector part, the trouble LED lights on.
Ex.) * Poor wiring with the detector and an event of error
10
Alarm 3 LED
When the tertiary alarm occurs, Alarm 3 LED lights on.
When it reaches Alarm 3 threshold during a test, Alarm 3 LED lights on.
11
Alarm 2 LED
When the secondary alarm occurs, Alarm 2 LED lights on.
When it reaches Alarm 2 threshold during a test, Alarm 2 LED lights on.
12
Alarm 1 LED
When the primary alarm occurs, Alarm 1 LED lights on.
When it reaches Alarm 1 threshold during a test, Alarm 1 LED lights on.
13
3-Color Bar Graph LED
3-Color bar graph LED displays measurement and alarm threshold in a continuous display as FND
display.
The bar graph LED lights on as green, orange, and red when the measurement is below Alarm 1
threshold, between Alarm 1 and Alarm 2 threshold, and above Alamr 2 threshold, respectively.
When the measurement is above the alarm threshold, the bar graph holds the maximum value
and flickers to display warning.
14
"FUNC" S/W
"FUNC" S/W is a key to input data by changing and selecting threshold, type, dead band, delay
movement, and etc. settings of the alarm.
15
"UP" S/W
After selecting each mode using "FUNC" S/W, use to increase the set value or to select the next
setting.
When a value needs to be changes in a large range, pressing "UP" S/W for a certain time changes
the value rapidly.
16
"DOWN" S/W
After selecting each mode using "FUNC" S/W, use to decrease the set value or to select the
previous setting.
When a value needs to be changes in a large range, pressing "DOWN" S/W for a certain time
changes the value rapidly.
17
"TEST" S/W
Pressing "TEST" S/W enters a mode that performs self-test.
Measurement FND flickers and the value can be adjusted using "UP" S/W and "DOWN" S/W to
check the alarm operation status.
To release self-test, press "RESET" S/W.
18
"RESET" S/W
Performs functions to release alarm, self-test, and program setting, etc.
No
ITEMS
SPECIFICATION
19
"BZ-STOP" S/W
Used to stop the buzzer upon an event of alarm
20
Buzzer
Operates in a continuous tone upon an event of warning or fault during a test.
21
Terminal Block Cover
To supply power to the equipment, open the terminal block cover and connect power cable.
22
RS-485 Network
RS-485 network module is isolated type that connects PC and other external network devices to
receive and transmit the current concentration and settings, etc.
23
Module (Option)
Converter that converts 220V-AC to 24V-DC power.
24
SMPS
S/W used to turn ON and OFF of the control unit power. When performing cable wiring work,
power must be turned OFF.
25
Power ON/OFF S/W
Works as a breaker to protect the equipment by cutting fuse with heat generated from
overcurrent.
26
Fuse
Terminal for power cable connection for operation of the control unit.
27
Power Input Terminal
Auxiliary power terminal for installation of external warning light during operation of the control
unit.
28
Signal output Terminal
Used for Relay Dry Contract Signal such as warning, failure, etc. and connecting Switch Signal
Output Cable, etc.
29
Signal I/O terminal
Used for connecting cables for power supply of gas leak detector, 4~20 mA current output, and
RS-485 MODBUS Network, etc.
30
Cover Fixing Hook
Device to fix the cover on the case body. To open the cover, push the hook and pull the cover
towards the front.
31
LCD PCB Ass'y
Displays measurement from detector in a continuous manner.
During test, it displays user defined value with flickering.
[Table 1. GTC-540 Configuration Description]
4. Name and Description of Each Part
4. Name and Description of Each Part
