Greystone Energy Systems GDT Series User manual

Page 1
INTRODUCTION
The Carbon Monoxide/Nitrogen Dioxide series of sensors
monitor CO gas levels and oers an optional local or
remote NO2sensor.
Features include an LCD for conguration and monitoring,
various output signal types, optional temperature sensor,
optional relays for alarm indication, optional high intensity
strobe and buzzer for alarms and eld replaceable
calibrated sensors.
BEFORE INSTALLATION
Read these instructions carefully before installing and commissioning the gas sensor. Failure to follow
these instructions may result in product damage. Do not use this device in an explosive or hazardous
environment, with combustible or ammable gases, as a safety or emergency stop device or in any other
application where failure of the product could result in personal injury. Follow electronic discharge
precautions during installation and do not exceed the device ratings.
MOUNTING
For wall mounting, select a suitable mounting
area away from opening windows or doors and
avoid areas subject to high vibrations or excessive
moisture. The recommended mounting height is
1.2 - 1.8 m (4' - 6') above the oor. The enclosure
has a hinged cover with a latch. Open the cover
by pulling slightly on the latch on the right side
of the enclosure as shown in Figure 1. Mount the
device directly to the at surface using the four
integrated mounting holes that are provided on
each corner of the enclosure using screws (not
provided). Ensure the sensor pods are pointing
downwards as shown in Figure 1.
The enclosure oers two entry points for wiring
one on top and one on bottom, see Figure 2 for
locations. The enclosure includes one rubber
grommet installed in the bottom wiring hole.
Depending ontheinstallationwiringcanberouted
through top or bottom hole and the grommet can
be placed in the unused hole. The hole provided
is for conduit or cable gland mounting. The hole
size is 21.38mm (0.86”) diameter.
Make wiring connections as per the "Wiring"
illustrations as shown in Figure 6. Once the wiring
and device setup are complete, close and latch
the cover. The enclosure includes a hole to allow
the use of anti-tamper device.
REMOTE NO2MOUNTING
The recommended mounting height for the
remote NO2 sensor is 0.6 m (2') below the ceiling
and must be mounted within 3m (10') of the
main enclosure as shown in Figure 3. Secure the
enclosure to the selected section of wall above the main enclosure with (2) #10 x 25 mm (1”) self-tapping
screws (not provided) and tighten screws until the enclosure is tight against the wall as shown in Figure 4.
Ensure there is no movement of the enclosure.
Figure 1
Figure 2
Figure 3 Figure 4
Maximum Distance
3m (10')
Wiring entry
Sensor Pods
Recommended Mounting
Height
1.2 - 1.8m (4 - 6')
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Carbon Monoxide/Nitrogen
Dioxide Transmitter
GDT Series - Installation Instructions

Page 2
The enclosure has a hinged cover with a latch. Open the
cover by pulling slightly on the latch on the right side of
the enclosure. At the same time pulling on the cover.
Make wiring connections as per the “Wiring” illustrations.
See Figure 9.
Swing door closed until securely latched. For added
security, 2 screws are provided that may be installed in
the integrated screw tabs. See Figure 5.
WIRING
Deactivate the 24 Vac/dc power supply until all connections are made to the device to prevent electrical
shock or equipment damage. Follow proper electrostatic discharge (ESD) handling procedures when
installing the device or equipment damage may occur. Use 14-22 AWG shielded wire for all connections
and do not locate the device wires in the same conduit with wiring used to supply inductive loads such
as motors. Pull enough wire into the enclosure to reach the terminal blocks and complete the wiring
connection according to the wiring diagram. Make all connections in accordance with national and local
codes.
Connect the plus DC or the AC voltage hot side to the PWR terminal and the power supply common is
connected to the COM terminal. The device is reverse voltage protected and will not operate if connected
backwards. It has a half-wave power supply so the supply common is the same as the signal common. Use
caution when wiring multiple devices or when grounding the secondary of a transformer to ensure that
the circuit ground point is the same on all devices and the controller.
The sensor can be ordered with four output options. Analog options include 4-20 mA active output or
voltage output congurable as 0-5 Vdc or 0-10 Vdc. Network options include BACnet® or Modbus.
The analog outputs are available on the CO, TEMP and
NO2terminals. The signal type may be ordered as either
voltage or 4-20 mA active outputs. The voltage model
is selectable for either 0-5 or 0-10 Vdc via the menu (the
factory default is 0-5 Vdc). The current outputs operate
in the active mode and do not require a loop power
supply. This means that the signal current is generated
by the sensor and the outputs must not be connected
to a powered input or device damage will result. Check
the controller Analog Inputs (AI) to determine proper
connection before applying power. Both current and
voltage output signals are referenced to the COM terminal.
The analog output signals are typically connected directly
to the Building Automation System (BAS) and used as
control parameters. See Figure 6.
Figure 5
Figure 6
Typical wiring for 24 Vdc power from controller Typical wiring for 24 Vac power from controller
Controller
Controller
24 Vac Transformer
PWR
COM
CO
TEMP
NO2
PWR
COM
CO
TEMP
NO2
+24 Vdc
COMMON
Analog Input
Analog Input
Analog Input
COMMON
Analog Input
Analog Input
Analog Input
24 Vac
COMMON
-
+
STATUS STROBE ALARM
UP
TEST
RL1 RL2
DOWN
MENU
PWR COM TEST B+ A- SHLD CO TEMP NO2 RP RC CSLP SCLM SDAP SDAM RT+ RT- NC1 COM1 NO1 NC2 COM2 NO2
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Page 3
If the device includes the optional network connection, use
twisted shielded pair to connect to the terminals marked
A-, B+ and SHLD (SHIELD). The positive wire connects to B+,
the negative to A- and the cable shield must be connected
to the SHLD terminal on each device. The shield wire should
be connected to earth ground at one end of the network
only. See Figure 7. If the device is installed at either end of
an RS-485 network, an end-of-line (EOL) termination resistor
(121 ohms) should be installed in parallel with the A- and B+
terminals.This device includes a network termination resistor
and jumper that can be used to connect the EOL resistor on
the PCB. Simply move the jumper to the EOL position and
no external resistor is required. See Figure 8.
Anetworksegmentisasingleshieldedwirelooprunbetween
several devices (nodes) in a daisy chain conguration. The
total segment length should be less than 1220 meters
(4000 feet) and the maximum number of nodes on one
segment length is 128. Nodes are any device connected
to the loop and include controllers but do not include
the EOL terminators. To install more than 128 devices, or
to increase network length, repeaters will be required for
proper communication. The maximum daisy chain length
(segment) depends on transmission speed (baud rate),
wire size and number of nodes. If communication is slow or
unreliable, it may be necessary to wire two daisy chains to
the controller with a repeater for each segment.
The toxic gas sensor may have one or two optional relays
installed. The relays are Form C type with both a normally
open (NO) and a normally closed (NC) contact. The relay
contacts may be connected to controller Digital Inputs (DI) for status monitoring or used to directly control
an alarm or ventilation fan. Do not exceed the device contact ratings. In some cases, a separate control
relay may be used between the sensor relay and a large fan for example.
Figure 10
NC1
COM1
NO1
Digital
Input
Figure 7
Set EOL Jumper
Building Controller
Device 01 Device 02 Device 03
Connect Shield One End Only
PWR
COM
PWR
COM
PWR
COM
SHLD
B+
A-
SHLD
B+
A-
SHLD
B+
A-
BACnet® Master
24 Vac / dc
Common
Shield
B+
A-
Building Controller
Device 01 Device 02 Device 03
Connect Shield One End Only
PWR
COM
PWR
COM
PWR
COM
SHLD
B+
A-
SHLD
B+
A-
SHLD
B+
A-
BACnet® Master
24 Vac / dc
Common
Shield
B+
A-
External 24 Vdc Power
Supply or 24 Vac
Transformer
Figure 8
EOL
EOL EOL
OFFON
Figure 9
Main Unit Remote NO2
Remote NO2 Wiring
RP
RC
SCLP
SCLM
SDAP
SDAM
12V
COM
CLP
CLM
DAP
DAM
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Page 4
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 dierent 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 o, the Status LED will ash 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.
NO2sensor 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 NO2.
Figure 11 Figure 12
RT+
RT-
TEMP
COM
Analog Input
Analog Input
COMMON
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Page 5
CO
xxx ppm
Temp
24.5 °C
NO2
xx.x ppm
CO xxx
24.5 °C
CO xxx
NO2 xx.x
NO2 xx.x
76.1 °F
CO
Detector
NO2
Detector
NOTE:
• The sensor readings are compared to pre-set setpoints for alarms and if they are exceeded the device
enters Alarm Mode
• The 2 alarms are always present with network devices
• The alarms are only present on analog devices if the relays are also included
• There is no alarm associated with the temperature value
• Alarm1 is always tied to Relay1 (if present) and Alarm2 is always tied to Relay2 (if present)
• Alarm1 and Alarm2 may be freely assigned to CO or NO2
• The alarm resets back to Normal Mode which can be congured via the menu as either Automatic
reset or Manual Reset
• When an alarm condition occurs, the alarm status will be displayed alternately with the normal
display. If more than one alarm occurs, then they will alternate every 2 seconds with the normal
display. This includes all active alarm conditions
OPERATION - ALARMS
Start Up Normal TEST
MODE
Comm
failure
with CO
Sensor
POD
Comm
failure
with NO2
Sensor
POD
CO ppm
> Buzzer
Setpoint
NO2ppm
> Buzzer
Setpoint
ppm >
Strobe
Setpoint
ppm >
Alarm 1
Setpoint
Status LED Flashing
GREEN
GREEN Flashing
RED
Flash RED
every 10
minutes
Flash RED
every 10
minutes
Flashing
RED
Flashing
RED
Flashing
RED
Flashing
RED
Strobe
LED
OFF OFF Flashing - - - - Flashing -
Alarm LED OFF OFF RED - - - - - RED
Buzzer OFF OFF Beep
Every 15
seconds
Short
every 10
minutes
Short
every 10
minutes
ON-Short ON-Long - -
CO
xxx ppm
Alarm1
CO xxx
Alarm2
NO2 xx.x
CO
xxx ppm
• When a buzzer alarm condition occurs, the buzzer alarm status will be displayed alternately with
the normal display. If more than one alarm occurs, then they will alternate every 2 seconds with the
normal display. This includes all active alarm conditions.
The temperature sensor can be ordered as a feed through with dierent sensor options, or as a
transmitter. When congured as a transmitter output signal is scaled 4-20 mA or 0-5/0-10 Vdc or network
variable depending on the device model. The temperature range may be changed to -20-50 °C (-4-122°F)
or to 0-50°C (32-122°F) via the Setup Menu.
If the model also includes a NO2sensor, then the output signal is scaled 0-10 ppm = 4-20 mA or 0-5/0-10
Vdc or as a network variable.
The sensor readings are also displayed on the LCD depending on the device model and can also be
congured with the Setup Menu. There are several congurations on how information is displayed, see
the Menu section for full details. Example displays are shown below.
• For a CO buzzer alarm, the sound is a short beep
• For an NO2buzzer alarm, the sound is a long beep
CO
xxx ppm
Buzzer
CO xxx
Buzzer
NO2 xx.x
CO
xxx ppm
CO / NO2
Detector
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Page 6
• The Automatic Alarm Reset operates as described below:
AUTOMATIC ALARM RESET (DEFAULT)
The trip point, hysteresis and delay time of each alarm can be programmed via the menu. For example,
Alarm1 defaults to a 50 ppm CO trip point, 10 ppm hysteresis and 2 minute delay time. Alarm2 defaults
to a 150 ppm CO trip point, 20 ppm hysteresis and 2 minute delay time All of these values can be
changed via the menu. In the example for Alarm1, a timer is started when the CO level exceeds 50 ppm
(the trip level). If the level drops below 50 ppm before 2 minutes (the delay time) has expired, then the
alarm is not activated. If the CO level exceeds 50 ppm for 2 minutes then the alarm is activated. The alarm
will remain activated until the CO level drops below 40 ppm (trip level – hysteresis). This alarm can be
used to signal a“low alarm”. Alarm2 operates in the same manner and has independently programmable
trip point, hysteresis and delay time. This alarm can be used to signal a “high alarm”. The LCD will indicate
the Alarm mode details and the LED will ash red. If the device has the optional relays, then Relay1 is tied
to Alarm1 and Relay2 is tied to Alarm2.
The buzzer alarm defaults to a 150 ppm CO trip point and 5 minute delay time and can be programmed
similarly to Alarm1 and Alarm2. When the trip point is exceeded for a time longer than the delay
time, then the buzzer will sound until the CO level falls below the trip point. The buzzer operates
independently of Alarm1 and Alarm2 and can be disabled via the menu. If enabled, and the device is in
Alarm mode, pressing the TEST switch will "silence" the buzzer only. Buzzer silence will only hold until the
buzzer alarm condition is cleared so the next buzzer setpoint alarm will activate the buzzer again. The
TEST switch will not change status of LEDs, only silence the Buzzer.
The Strobe alarm defaults to a 150 ppm CO trip point and 5-minute delay time and can be programmed
similarly to buzzer alarm. When the trip point is exceeded for a time longer than the delay time, then the
Strobe LED will ash until the CO level falls below the trip point. The Strobe LED operates independently
of Alarm1 and Alarm2 and can be disabled via the menu. If enabled, and the device is in Alarm mode,
pressing the TEST switch will have no impact on Strobe.
MANUAL ALARM RESET
In this case, the alarms will activate the same way as described above but will not automatically reset to
Normal Mode when the CO level drops below the trip level - hysteresis value. In order to reset the alarms
to Normal Mode the user must also press the TEST switch on the front cover (or activate the remote TEST
input). If the CO level is below the alarm level AND the TEST switch is pressed, then the alarms will return
to the Normal Mode.
The Manual Reset also applies to the buzzer alarm. If the buzzer alarm is active, pressing the TEST switch
will "silence" the buzzer. If the buzzer alarm was active but the CO level has been reduced below the trip
point, then the TEST switch must be pressed to reset the buzzer alarm to the Normal Mode.
OPERATION - TEST MODE
The Test mode function is disabled by default, it must be enabled via the menu to operate. To initiate the
Test function during normal operation, either press and hold the TEST switch, located on front cover for
1 second or activate it remotely by shorting the TEST + to COM. This will cause the Status LED to blink
red, all analog outputs to go to 100% and both alarms to activate. The buzzer will also beep once every
15 seconds if enabled and the LCD will indicate the Test mode and the remaining time. The Test function
will continue for 5 minutes (default) and then the device will reset to normal operation. The Test function
can be canceled by pressing the TEST switch a second time. Test mode cannot be activated if the device
is in Fault, Alarm or Re-Cal modes of operation, only in Normal mode. The Test function is useful to verify
the output and alarm relay operation and the Test time can be programmed via the menu. The Test Mode
display will show even if the LCD mode is set to o.
• The LCD will display an alarm if a sensor POD is not communicating and the buzzer will beep once
every ten minutes. The buzzer can be silenced by pressing the TEST switch.
NO2 Sens
Error
CO Sens
Error
TestMode
300 Sec
TestMode
299 Sec
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OPERATION - FAULT MODE
The Fault mode function is disabled by default, it must be enabled via the menu to operate. The
Fault function will monitor the CO and NO2sensor lifetime and indicate when either sensor should
be replaced. If the device determines that the sensor has reached the end of its useful life and that
replacement is necessary, it will enter Fault mode. This will cause the Status LED to blink red and the
buzzer to beep once every 10 minutes. The LCD will periodically show "Sensor Fault". The Fault mode can
be disabled via the menu or enabled at any time. If enabled, and the device is in Fault mode, pressing the
TEST switch will "silence" the buzzer due to the Fault alarm only. Buzzer silence due to the Fault alarm will
hold until the fault condition is reset via the menu. The buzzer may still activate due to a setpoint alarm if
enabled. The Fault Mode display will show even if the LCD mode is set to o.
CO
xxx ppm
CO
Fault
NO2
Fault
OPERATION - RE-CAL MODE
The Re-Cal mode function is enabled by default, it must be disabled via the menu if it is not required. The
Re-Cal function will monitor the device and indicate when the CO or NO2sensors should be re-calibrated.
If the device determines that the sensor requires re-calibration it will enter Re-Cal mode. This will cause
the Status LED to blink red and the buzzer to beep once every 10 minutes. The LCD will periodically
show " CO Cal Required" or “NO2Cal Required” as applicable. If enabled, and the device is in Re-Cal mode,
pressing the TEST switch will "silence" the buzzer due to the Re-Cal alarm only. Buzzer silence due to the
Re-Cal alarm will hold until the Re-Cal condition is reset via the menu. The buzzer may still activate due
to a setpoint alarm if enabled. The Re-Cal Mode display will show even if the LCD mode is set to o.
OPERATION - SETUP MENU
The device has several parameters that can be congured locally via the Setup menu using the keypad
and LCD. All parameters default to typical values but the installer may want to change some values.
In some cases, such as the device network address, the installer MUST change the settings before
operation. Any changes made are saved in non-volatile memory and are restored in case of a power loss.
Only the menu items relevant to the device model will be shown. The menu can be accessed at any time
after the warm-up mode and if there is 5 minutes of inactivity the menu will close, and normal operation
will continue. Note that the TEST switch has no aect when the Setup menu is in use.
The menu has several items as shown below. To enter the menu, press and release the <MENU> key.
This will enter the Setup Menu step 1, pressing the <MENU> key a second time saves the setting and
advances to step 2. Each press of the <MENU> key saves the current setting and advances the menu
item. The <UP> and <DOWN> keys are used to make changes to program variables by scrolling through
the available options. Holding the <UP> or <DOWN> key will scroll through some options at a faster rate.
To access the keys open the cover, keys are located on PCB and are marked. When a value is changed, use
<MENU> to save it to memory and advance to the next menu item. The rst column below shows what
will be displayed on the LCD, including the default value.
<Menu> Press and release the <Menu> key to enter the Setup Menu
CO
xxx ppm
CO Cal
Required
NO2 Cal
Required
CO
xxx ppm
<MENU> Press to advance to next menu item
CO Range
0-300ppm
Press the <UP> or <DOWN> keys to scroll through the available
options. The CO sensing range and output scale can be changed
to 0-100ppm, 0-150ppm, 0-300pm, 0-400ppm, or 0-500ppm. The
factory default CO range is 0-300ppm.
1. CO RANGE
Only if CO is sensor is installed & the output type is Voltage or mA
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Page 8
Press the <UP> or <DOWN> keys to scroll through the available
options. The temperature sensing range and output scale can
be changed to -20 to 50°C, 0 to 50°C, -4 to 122°F, 32 to 122°F if
necessary. The factory default temperature range is -20 to 50°C.
T Range
-20-50°C
Only if Temperature is sensor is installed & the output type is Voltage or mA
2. TEMP RANGE
<MENU> Press to advance to next menu item
Press the <UP> or <DOWN> keys to scroll through the available
options. The buzzer alarm trip point for NO2may be set to OFF
or from 1 to 10 ppm in 1 ppm increments. The default is 2 ppm.
The buzzer may operate as a CO alarm, an NO2alarm or both
depending on the trip point settings. If set to OFF, then the
buzzer will not operate as an NO2alarm.
Buzzer
Enable
Use <UP> or <DOWN> to enable or disable the buzzer alarm. When disabled,
the buzzer will not sound if the buzzer trip point is exceeded. The buzzer will still
beep on startup and will still beep for a fault alarm (if enabled) and Re-Cal alarm
(if enabled). The factory default is Enable.
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
3. BUZZER
CO Buzz
Dly 5Min
Press the <UP> or <DOWN> keys to scroll through the available
options. The CO buzzer delay may be set from 0 to 10 minutes
in 1-minutes increments. Is only available if the CO Buzzer Trip is
enabled not set to OFF. The default is 5 minutes.
NO2 Buzz
Trip 2
NO2 Buzz
Dly 5Min
Buzzer
Test OFF
Press the <UP> or <DOWN> keys to scroll through the available
options. The NO2buzzer delay may be set from 0 to 10 minutes
in 1-minute increments. The default is 5 minutes.
Press the <UP> or <DOWN> to toggle the buzzer ON or OFF.
CO Buzz
Trip 150
Press the <UP> or <DOWN> keys to scroll through the available
options. The buzzer alarm trip point for CO may be set to OFF
or from 20 to 500 ppm in 10 ppm increments. The default if 150
ppm. The buzzer may operate as a CO alarm, an NO2alarm or
both depending on the trip point settings. If set to OFF, then the
buzzer will not operate as a CO alarm.
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
4. CO BUZZER
TRIP POINT
Only if the buzzer & CO sensor is installed
Only if the buzzer & NO2sensor is installed
Only if the buzzer is enabled
5. CO BUZZER
DELAY
6. NO2BUZZER
TRIP POINT
7. NO2BUZZER
DELAY
8. BUZZER
<MENU> Press to advance to next menu item
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Page 9
Use <UP> or <DOWN> to scroll through the available options.
The strobe alarm trip point for CO may be set to OFF or from
20 to 500 ppm in 10 ppm increments. The default is 150 ppm.
The strobe may operate as a CO alarm, a NO2alarm or both
depending on the trip point settings. If set to OFF, then the
strobe will not operate as a CO alarm.
Strobe
Enable
Use <UP> or <DOWN> to enable or disable the Strobe LED. When disabled, the
Strobe will not ash if the strobe trip point is exceeded. The strobe will still ash
on startup and will still ash for a fault alarm (if enabled). The factory default is
Enable.
<MENU> Press to advance to next menu item
9. STROBE
CO Strb
Trip 150
Only if the strobe is enabled and the CO sensor is installed
10. CO STROBE
TRIP
Use <UP> or <DOWN> to scroll through the available options.
The CO strobe delay may be set from 0 to 10 minutes in 1 minute
increments. The default is 5 minutes.
Use <UP> or <DOWN> to scroll through the available options.
The NO2 strobe delay may be set from 0 to 10 minutes in 1
minute increments. The default is 5 minutes.
Use <UP> or <DOWN> to scroll through the available options.
The strobe alarm trip point for NO2may be set to OFF or from 1
to 10 ppm in 1 ppm increments. The default is 2 ppm. The strobe
may operate as a CO alarm, a NO2alarm or both depending
on the trip point settings. If set to OFF, then the strobe will not
operate as a NO2 alarm.
CO Strb
Dly 5Min
NO2 Strb
Dly 5Min
NO2 Strb
Trip 2
Only if the strobe is enabled, the CO sensor is installed and the CO Strb Trip is not set to OFF
Only if the strobe is enabled, the NO2sensor is installed and the NO2Strb Trip is not set to OFF
Only if the strobe is enabled, the NO2sensor is installed
11. CO STROBE
DELAY
13. NO2
STROBE DELAY
12. NO2
STROBE TRIP
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Alarm 1
CO
Press the <UP> or <DOWN> to scroll through the available
options. The available options are CO or NO2. Alarm1 may be
assigned to either sensor. The default is CO.
Only if Relay1 installed & only if 2 sensors are installed
15. ALARM 1
Use <UP> or <DOWN> to toggle the strobe ON or OFF. Press
<MENU> to reset to OFF and advance.
Strobe
Test OFF
Only if the strobe is enabled
14. STROBE
TEST
<MENU> Press to advance to next menu item
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Page 10
Alarm 1
Trip 50
Alarm 1
Trip 2
Press the <UP> or <DOWN> to change the Alarm1 Setpoint
within the limits. If Alarm1 is assigned to CO the range is 20 to
500 ppm in 10 ppm increments and default is 50 ppm. If Alarm1
is assigned to NO2 the range is 1 to 10 ppm in 1 ppm increments
and default is 2 ppm.
Only if Relay1 is installed
16. ALARM 1
SETPOINT
Alarm 1
Hyst 10
Alarm 1
Hyst 0.5
Press the <UP> or <DOWN> to change the Alarm1 Hysteresis
within the limits. If the Alarm1 is assigned to CO the range is
10 to 100 ppm in 5 ppm increments and default is 10 ppm. If
Alarm1 is assigned to NO2the range is 0.5 to 2.0 ppm in 0.5 ppm
increments. The default is 0.5 ppm.
17. ALARM 1
HYSTERESIS
Alarm 1
Dly 2Min
Relay 1
Direct
Relay 1
Test OFF
Press the <UP> or <DOWN> to change the Alarm1 Delay time
within the limits. The delay time may be set from 0 to 10 minutes
in 1-minute increments. The default is 2 minutes.
Press the <UP> or <DOWN> to toggle the available options.
Relay 1 operation may be set to Direct or Reverse. Direct
operation means the relay is normally not energized and will
energize on an alarm condition (the NO/NC PCB designations
are correct). Reverse operation means the relay is normally
energized and will de-energize on an alarm condition (the NO/
NC PCB designations are reversed). Reverse operation can be
used for‘Fail Safe’ operation as the relay will change state on
power loss. The default is Direct.
Press the <UP> or <DOWN> to toggle Relay1 ON or OFF to test
the relay operation.
18. ALARM 1
DELAY
19. RELAY
OPERATION
20. RELAY TEST
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Alarm 2
CO
Press the <UP> or <DOWN> to scroll through the available
options. The available options are CO or NO2. Alarm 2 may be
assigned to either sensor. The default is CO.
Only if Relay2 & 2 sensors are installed
21. ALARM 2
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Alarm 2
Trip 150
Alarm 2
Trip 4
Press the <UP> or <DOWN> to change the Alarm2 setpoint
within the limits. If Alarm2 is assigned to CO the range is 20
to 500 ppm in 10 ppm increments and default is 150 ppm. If
Alarm2 is assigned to NO2the range is 1 to 10 ppm in 1 ppm
increments. Default is 4 ppm.
22. ALARM 2
TRIP POINT
<MENU> Press to advance to next menu item
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Page 11
Alarm 2
Hyst 20
Alarm 2
Dly 2Min
Alarm 2
Hyst 0.5
Press the <UP> or <DOWN> to change the Alarm2 Hysteresis
within the limits. If Alarm2 is assigned to CO the range is 10
to 100 ppm in 5 ppm increments. The default is 20 ppm. If
Alarm2 is assigned to NO2the range is 0.5 to 2.0 ppm in 0.5 ppm
increments. The default is 0.5 ppm.
Use <UP> or <DOWN> to change the Alarm 2 Delay time within
the limits. The delay time may be set from 0 to 10 minutes in
1-minute increments. The default is 2 minutes.
Only if Relay2 is installed
23. ALARM 2
HYSTERESIS
24. ALARM 2
DELAY
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Relay 2
Direct
Relay 2
Test OFF
TestMode
Disable
Use <UP> or <DOWN> to toggle the available options. Relay
2 operation may be set to Direct or Reverse. Direct operation
means the relay is normally not energized and will energize on
an alarm condition (the NO/NC PCB designations are correct).
Reverse operation means the relay is normally energized
and will de-energize on an alarm condition (the NO/NC PCB
designations are reversed). Reverse operation can be used for
‘Fail Safe’operation as the relay will change state on power loss.
The default is Direct.
Use <UP> or <DOWN> to toggle relay2 ON or OFF to test the
relay operation. Press <MENU> to reset to OFF.
Use <UP> or <DOWN> to disable or enable the test mode. The
default is Disable. When disabled, the front panel TEST switch
or TEST input will not initiate the test function. When enabled,
pressing the TEST switch will initiate the test function. Note that
the test mode will only function is the device is operating in the
Normal mode, the test function cannot be initiated if any alarm
is present.
25. RELAY 2
DIRECT/
REVERSE
26. RELAY 2
TEST
27. RELAY 2
TEST MODE
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Only if Relay2 Test Mode is enabled
TestMode
Time 5
Use <UP> or <DOWN> to change the test mode time within the
limits. The test mode operating time may be set from 1 to 15
minutes in 1-minute increments. The default is 5 minutes. This
item sets how long the test mode will operate when the TEST
switch is pressed.
28. RELAY 2
TEST MODE
TIME
<MENU> Press to advance to next menu item
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Page 12
Use <UP> or <DOWN> to set the NO2fault mode timer to
Disable, 1, 2, 3, 4 years or Reset. The factory default is Disable.
When disabled, the device will not sound the buzzer or provide
LCD and status LED indication when the NO2sensor life is
exceeded. When set to 1, 2, 3 or 4 years, the fault alarm will
activate to indicate that the NO2sensor life is exceeded. If set
to Reset and <MENU> is pressed, then the fault condition for
the NO2sensor is cleared, the NO2life-time timer is reset and
NO2fault mode remains at the previous setting. The timer is
automatically reset if the NO2sensor is replaced. If the desired
time has already been exceeded, then it cannot be selected.
Use <UP> or <DOWN> to set the CO fault mode timer to
Disable, 3, 4, 5, 6 years or Reset. The factory default is Disable.
When disabled, the device will not sound the buzzer or provide
LCD and status LED indication when the CO sensor life is
exceeded. When set to 3, 4, 5 or 6 years, the fault alarm will
activate to indicate that the CO sensor life is exceeded. If set to
Reset and <MENU> is pressed, then the fault condition for the
CO sensor is cleared, the CO life-time timer is reset, and CO fault
mode remains at the previous setting. The timer is automatically
reset if the CO sensor is replaced. If the desired time has already
been exceeded, then it cannot be selected.
Only if CO Sensor is installed
Only if NO2Sensor is installed
CO Fault
Disable
TestMode
Time 5
29. CO FAULT
MODE TIMER
30. NO2FAULT
MODE TIMER
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Use <UP> or <DOWN> to set the CO recalibration mode timer
to Disable, 1, 2, 3 years or Reset. The default is 1 Year. When
disabled, the device will not sound the buzzer or provide
LCD and status LED indication when the CO sensor requires
recalibration. When set to 1, 2 or 3 years, the Re-Cal alarm will
activate to indicate that the CO sensor requires recalibration. If
set to Reset and <MENU> is pressed, then the Re-Cal condition
for the CO sensor is cleared, the CO Re-Cal timer is reset and
the CO Re-Cal mode remains at the previous setting. The timer
is automatically reset if the CO sensor is replaced. If the desired
time has already been exceeded, then it cannot be selected. If
the CO sensor is calibrated with gas via the User Menu then the
timer will be automatically reset.
Only if CO Sensor is installed
CO ReCal
1 Year
31. CO RECAL
MODE
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Page 13
<MENU> Press to advance to next menu item
Use <UP> or <DOWN> to turn ON or OFF the CO zero lter.
When ON, the device will lter low ppm readings such that 0-5
ppm CO will display and output 0 ppm. When OFF, 0-5 ppm
will display and output actual 0-5 ppm. The factory default is
ON. Note that the zero lter is automatically disabled when
performing a CO gas calibration.
Use <UP> or <DOWN> to turn ON or OFF the NO2zero lter.
When ON, the device will lter low ppm readings such that
0-0.5 ppm NO2will display and output 0 ppm. When OFF, 0-0.5
ppm will display and output actual 0-0.5 ppm. The factory
default is ON. Note that the zero lter is automatically disabled
when performing a NO2gas calibration.
Only if CO Sensor is installed
0 Filter
CO ON
0 Filter
NO2 ON
34. CO ZERO
FILTER
35. NO2ZERO
FILTER
Only if NO2Sensor is installed
Use <UP> or <DOWN> to set the NO2 recalibration mode
timer to Disable, 1, 2, 3 years or Reset. The default is 1 Year.
When disabled, the device will not sound the buzzer or provide
LCD and status LED indication when the NO2sensor requires
recalibration. When set to 1, 2 or 3 years, the Re-Cal alarm will
activate to indicate that the NO2sensor requires recalibration. If
set to Reset and <MENU> is pressed, then the Re-Cal condition
for the NO2sensor is cleared, the NO2Re-Cal timer is reset and
the NO2Re-Cal mode remains at the previous setting. The timer
automatically resets if the NO2sensor is replaced. If the desired
time has already been exceeded, then it cannot be selected. If
the NO2sensor is calibrated with gas via the User Menu then
the timer will be automatically reset.
Use <UP> or <DOWN> to set the Alarm Mode to Auto or
Manual. The default is Auto. This setting controls how Alarm1,
Alarm2 and the buzzer alarm resets back to Normal mode. For
the Auto setting, the device will reset the alarms automatically
once the gas level drops below the set alarm thresholds. For
the Manual setting, the gas level must be below the alarm
thresholds AND the user must press the TEST switch on the
device to reset the alarms.
Only if NO2Sensor is installed
NO2ReCal
1 Year
Alarm Md
Auto
32. NO2RECAL
MODE
33. ALARM
MODE
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
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Page 14
<MENU> Press to advance to next menu item
Use <UP> or <DOWN> to select a unique address from 0-127.
The default BACnet address is 3. Each device on the network
must have a unique address.
BACnet
MAC 3
40. ADDRESS
Only if BACnet®model
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Use <UP> or <DOWN> to toggle the voltage output type to
either 0-5 Vdc or 0-10 Vdc. The default is 0-5 Vdc.
Output
0-5 Vdc
38. OUTPUT
Only if Output is Voltage is installed
Use <UP> or <DOWN> to select a unique slave address from
1-255. The default Modbus slave address is 1. Each device on
the network must have a unique address.
ModBus
Addr 1
39. ADDRESS
Only if Modbus model
Use <UP> or <DOWN> to select either CO ppm, NO2ppm, CO + NO2, Temp,
CO + Temp, NO2+Temp, Status or None.
When set to CO ppm, only the actual ppm value of the CO reading will be
displayed on the LCD. When set to NO2ppm, only the NO2ppm reading will
be displayed and CO + NO2will display both values. If set to Temp, only the
temperature is displayed. If set to CO + Temp, then the CO and temperature
values are displayed. If set to NO2+Temp, then the NO2and temperature
values are displayed. If set to Status, the ppm values will not be displayed only
the device operating status. If set to None, there will not be any LCD display
information in Normal mode (the LCD will still work for menu operation).
The default and available options depend on the installed sensors. For example,
if the device only has a CO sensor, then CO ppm is the default and the only other
options available will be Status and None. If both sensors are installed, then the
default will be CO + NO2. If the temperature sensor is not installed (or resistive)
then no Temp display will be available. For Status, the normal display is CO
Detector, NO2Detector or CO / NO2Detector as applicable. If set to None, then the
backlight will be forced to Auto. If set to None, the test function still causes the
LCD to display while in test mode.
<MENU> Press to advance to next menu item
Display
CO ppm
36. DISPLAY
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Backlite
Auto
Use <UP> or <DOWN> to select the LCD backlight operation as Auto, O or On.
Auto means the backlight only operates when the menu is accessed, On means
the backlight is always on and O means it never lights. The default is Auto.
37. BACKLITE
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Page 15
<MENU> Press to advance to next menu item
Use <UP> or <DOWN> to select a parity value of None, Odd or
Even. The default ModBus parity is None.
Use <UP> or <DOWN> to select a baud rate of 9600, 19200,
38400, 57600, 76800 or 115200 as required. The default baud
rate is 9600.
ModBus
Parity N
BaudRate
9600
42. PARITY
41. BAUD RATE
Only if Modbus model
Only if Network model
<MENU> Press to advance to next menu item
Use <UP> or <DOWN> to toggle the stop bits between 1 and 2.
The default ModBus stop bits is 1.
Use <UP> or <DOWN> to set the CRC value to A001 (CRC-16
reverse), 1021 (CITT), 8005 (CRC-16), or 8408 (CITT reverse). The
default CRC polynomial is OxA001.
Use <UP> or <DOWN> to change the value from Minimum
to 50, 100, 150, 200, 250, 300 or 350mS. The factory default
ModBus slave response delay is Minimum (minimum delay
means just more than 3.5 character time delays, 4ms for 9600 baud
rate, for example).
ModBus
Stop 1
ModBus
CRC A001
ModBus
Del MIN
43. STOP BITS
44. CRC
45. DELAY
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
<MENU> Press to advance to next menu item
Only if CO Sensor is installed
This item allows zero calibration of the CO sensor. Ensure the
sensor is in clean air. Press and hold the <UP> key for 3 seconds
to initiate the calibration process. When the calibration is
complete, the display will indicate DONE. Then press <MENU>
to advance to the next selection. A CO Zero Calibration Counter
is incremented every time this step is performed. The CO ReCal
timer is reset whenever this step is performed.
CO Zero
Cal GO
CO Zero
Cal DONE
46. ZERO
CALIBRATION then
This item allows span calibration of the CO sensor. Apply 250
ppm CO gas to the sensor. Press and hold the <UP> key for 3
seconds to initiate the calibration process. When the calibration
is complete, the display will indicate DONE. Then press
<MENU> to advance to the next selection. A CO 250 Calibration
Counter is incremented every time this step is performed. The
CO Re-Cal timer is reset whenever this step is performed.
CO 250
Cal GO
CO 250
Cal DONE
47. SPAN
CALIBRATION then
<MENU> Press to advance to next menu item
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Page 16
This item allows zero calibration of the NO2sensor. Ensure the
sensor is in clean air. Press and hold the <UP> key for 3 seconds
to initiate the calibration process. When the calibration is
complete, the display will indicate DONE. Then press <MENU>
to advance to the next selection. A NO2Zero Calibration
Counter is incremented every time this step is performed. NO2
Re-Cal timer is reset whenever this step is performed.
This item allows span calibration of the NO2sensor. Apply 10
ppm NO2gas to the sensor. Press and hold the <UP> key for 3
seconds to initiate the calibration process. When the calibration
is complete, the display will indicate DONE. Then press <MENU>
to advance to the next selection. A NO210 Calibration Counter is
incremented every time this step is performed. The NO2Re-Cal
timer is reset whenever this step is performed.
NO2 Zero
Cal GO
NO2 10
Cal GO
NO2 Zero
Cal DONE
NO2 10
Cal DONE
48. ZERO
CALIBRATION
49. SPAN
CALIBRATION
<MENU> Press to advance to next menu item
then
then
Only if NO2Sensor is installed
This item allows oset calibration of the temperature sensor.
Use <UP> or <DOWN> to add an oset to the temperature
measurement. -1.0 subtracts 1.0° from the reading, +1.2 adds
1.2° to the reading. Units depend on the range selected, either
°C or °F. The oset resets to 0.0 if the units are changed. The
range is -5.0 to +5.0 for °C and -10.0 to +10.0 for °F. Resolution
is 0.1°.
T Oset
0.0 °C
50. TEMP
OFFSET
Only if Temperature Sensor in installed
<MENU> Press to advance to next menu item
<MENU> Press to exit the Setup Menu and return to normal mode
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Page 17
SPECIFICATIONS
Gas Type Detected .........................................Carbon Monoxide (CO) and/or Nitrogen Dioxide (NO2)
Sensor Type .........................................................Electrochemical, diusion sampling
Ambient Sensor Accuracy ............................CO: ±5ppm, or ±5% of reading
NO2:±0.2ppm or ±5% of reading
Measurement Range.......................................CO: 0 - 500ppm, adjustable 100 - 500ppm
NO2:0 - 10ppm
Response Time ................................................<30 seconds typical
Warm-Up Time.................................................1 minute
Sensor Coverage Area...................................700m2(7500ft2) or 15m (50ft) radius
Sensor Life Span..............................................CO: 5-7 years in air
NO2:2 years
Sensor Reproducibility (same day) .......... ±2%
Long Term Drift ...............................................CO: <5% per year
NO2:Zero, <±0.2ppm per year
Span, <2% signal/month
GENERAL
Power Supply................................................... 24 Vdc ±20% or 24 Vac ±10% (non-isolated half-wave rectied)
Protection Circuitry........................................Reverse voltage protected and transient protected
Output Signal Type........................................4-20 mA (3-wire), 0-5 Vdc / 0-10 Vdc, BACnet® or Modbus
Network Interface ..........................................Hardware: 2 wire RS-485
Software: Native BACnet® MS/TP or Modbus RTU
Baud Rate: Locally set 9600, 19200, 38400, 57600, 76800, or 115200
MAC Address Range: 0-255 (Factory default is 1)
(128 devices max on one daisy chain)
Current Consumption...................................425 mA @ 24 Vac max, 220 mA @ 24 Vdc max (test mode)
Output Drive Capabilities............................Current: 550Ω maximum
Voltage: 10,000Ω minimum
Ambient Operating Range..........................-20 to 50°C (-4 to 122°F), 15 to 90 %RH non-condensing
Storage Temperature ....................................-30 to 60°C (-22 to 140°F)
Display (LCD)....................................................Viewable or concealed (with cover closed)
Units: ppm for CO/NO2, °C/°F for optional temperature
Size: alpha-numeric 2-line x 8 characters
35mm W x 15mm H (1.4" x 0.6")
Backlight: Enable or disable via menu
User Interface...................................................Silence / Test button, Bi-color status LED, Red LED Alarm indicator,
White high intensity LED strobe (optional)
TEMPERATURE SIGNAL (OPTIONAL)
Type ........................................................................Thermistor or RTD
Accuracy ...............................................................Thermistors: ±0.2˚C (±0.36˚F) @ 25˚C (77˚F)
Platinum RTD’s: ±0.3˚C (±0.54˚F) @ 0˚C (32˚F)
Nickel RTD’s: ±0.4˚C (±0.72˚F) @ 0˚C (32˚F)
Output................................................................ 2 Wire Resistive
Type.....................................................................Analog, BACnet® or Modbus
Sensor Accuracy..............................................±0.2°C (±0.36˚F)
Range..................................................................-20 to 50°C (-4 to 122°F) or 0 to 50°C (32 to 122°F) (eld selectable)
Output................................................................ Analog: 0-5/0-10 Vdc or 4-20mA (As per output selected)
BACnet®/Modbus: Network Variable
RELAY OUTPUTS (OPTIONAL)
Contact Ratings...............................................Form C (NO + NC), 5 Amps @ 140 Vac, 5 Amps @ 30 Vdc
adjustable setpoints, delay and hysteresis, programmable via menu
Relay Time Delay.............................................Programmable via menu
ALARM (OPTIONAL)
Audible Alarm (optional).............................Buzzer, 93dB @ 30cm
Visual Alarm (optional).................................High intensity white LED strobe
Enclosure Material..........................................Grey Polycarbonate, UL94-V0
Enclosure Rating.............................................IP65 (NEMA 4) with Security Screw installed
Main Enclosure Dimensions.......................Inclu. Sensor Pod: 202.3 x 184 x 54.5 mm (8 x 7.24 x 2.15”)
Main Enclosure Weight................................. Inclu. Sensor Pod: 515 grams (1.14 lbs)
Remote NO2Dimensions.............................Inclu. Sensor Pod: 109.5 x 83.3 x 52 mm (4.31 x 3.28 x 2.05”)
Remote Enclosure Weight........................... Inclu. Sensor Pod: 109 grams (0.24 lbs)
Wiring Connections.......................................Screw terminal block (14 to 22 AWG)
Top or bottom conduit entry 22.73 mm (0.875") hole
Approvals ..........................................................CE
Country of Origin...............................................Canada
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PRINTED IN CANADA
Page 18
NETWORK SETUP GUIDE
The network setup guide describes the implementation of the BACnet® or Modbus protocol. It is intended
to assist control system programmers who may need to add support to their systems to communicate
with this device.
BACnet® and Modbus setup guide downloads are available online.
BACnet® PROTOCOL
https://downloads.greystoneenergy.com/SG/SG-GDTXXXBAC-003.pdf
MODBUS PROTOCOL
https://downloads.greystoneenergy.com/SG/SG-GDTXXXMOD-001.pdf
DIMENSIONS
54.5 mm
2.15"
160.00 mm
6.29"
184.00 mm
7.24"
170.00 mm
6.69"
32.25 mm
1.26"
76.2 mm
3.00"
52.0 mm
2.05"
82.5 mm
3.25"
69.8 mm
2.75"
32.25 mm
1.26"
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