* Integrated type controller with built-in micro processor          
* Connectible with all kinds of gas detector           
* Easy expansion with international standard din type case
* Various type receiving unit (wall mount, panel mount, 19" rack type)        
* Gas concentration display with 4-digit & Bar-graph (32 LED)          
* 3 color display by alarm stages (Green,  Yellow,  Red)         
* 3 Alarm level LED display and relay contact output           
* Easy configuration of monitoring system with RS-485 (isolated) Modbus serial communication         
* Programmable Alarm setting (level, delay time, & etc)          
* Peak hold  
* Self diagnosis
* Backup power unit (Optional item)

MULTI-CHANNEL TYPE CONTROLLER
Model	GTC-200A COMMOM (ALARM UNIT)	GTC-200ACHANNEL (DENSITY INDICATING UNIT)
Operation display	8-LEDs (Power, 3-alarm, Trouble Buz. Stop, PC & channel data communication)	6-LEDs (Power, 3-alarm, Trouble) Stand-by (maintenance))
Measuring display		4-Digit FND& Bar-Graph (32 LED)
Measuring range		1~9999 (programmable) (%LEL, ppm, % Vol)
Alarm display	Visual: 3-Alarm, Trouble LEDs Audible: buzzer	Visual: 3-Alarm, Trouble LEDs
Alarm output signal	3-Alarm, Trouble, Buzzer AC250V/5A relay contact (SPST)	3-Alarm, Trouble AC250V/5A relay contact (SPDT)
Alarm level set		Programmable within detection range
Input signal		4-20mA DC (2 wire or 3 wire)
Output signal	Isolated RS-485 Modbus (option)	4-20mA DC
Reset signal	Reset switch & remote control	Reset switch
Program set mode		Alarm value & type (1, 2, 3 alarm)
		Alarm time (instant & delay (1~30 min))
		Alarm dead band
		Measuring value compensation (SAD)
		Relay output on/off
Operating temperature	-10∩ ~ +50∩
Operating humidity	0 ~ 99%.RH (non-condensing)
Operating power	Single : 18~30V DC (24V DC normal) / 100mA max.
	Multi channel type : AC 110 / 220V
Battery power	24V DC / 600mA, 1300mA (option)
	Aux. power unit (option)