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Relay terminals are designated NO, COM and NC. Each relay output is independent and isolated from the
other and the relays COMs are not connected to the device COM. See Figure 10.
An optional temperature sensor is available either as a feed through with different sensor types, see Figure
11, or as a transmitter with an analog output available on TEMP & COM terminals. See Figure 12. Terminals
are not present unless option is ordered.
OPERATION - START-UP
Upon applying power to the device, it will enter the start-up mode. The LCD backlight will be on during
the start-up mode. The LCD will display the current operating settings for 2 seconds each:
Version
1.00
0-5 Vdc
Output
Modbus
Network
BaudRate
9600
Address
1
CO Range
0-300ppm
T Range
-20-50
°
C
Warm Up
60 Sec
NO2Range
0-10ppm
0-10 Vdc
Output
BACnet
Network
4-20 mA
Output
Software Version Number
Analog output type (if applicable)
(0-5 Vdc, 0-10Vdc, or 4-20 mA)
Network protocol type (if applicable)
(BACnet® or Modbus)
Baud rate setting (if applicable)
(9600, 19200, 38400, 57600, 76800, or 115200)
Network Address (if applicable)
(0-255)
CO sensor range (if applicable)
(0-100, 0-150, 0-300, 0-400 or 0-500)
Temperature sensor range (if applicable)
(-20 to 50°C, 0 to 50°C, -4 to 122°F, 32 to 122°F)
After the above display, the alarm buzzer will beep twice (if applicable)
The start-up mode will continue with a
one minute countdown
During the warm-up mode the alarms will be set to off, the Status LED will flash green, all
communications are disabled, the key pad is disabled and any analog output will be set to minimum
value.
Immediately after the start-up mode, the device will enter normal mode.
NO
2
sensor range (if applicable)
OPERATION - NORMAL
During normal operation, the installed sensor measurements are read and displayed on the LCD. The
analog outputs are updated with the appropriate values and alarm conditions are monitored.
In normal operation the sensor(s) will measure the gas concentration level in the surrounding air and
output a proportional value on the analog output which is scaled to the default range of 0-300 ppm CO
or 0-10 ppm NO
2
.
Figure 11
Figure 12
RT+
RT-
TEMP
COM
Analog Input
Analog Input
COMMON
IN-GE-GDTXXX-06
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