1.3Alarms and Fault Condition ...........................................................................................................................3
1.4Power Supply-Internal Rechargeable Battery and Charging Accessory ........................................................ 4
1.5LCD Main Display Function .......................................................................................................................... 5
4.Recharging the Internal Battery Pack...............................................................................................19
4.1Non-Hazardous and Indoor Location ........................................................................................................... 19
4.2Connecting to Mains Supply........................................................................................................................ 19
5.4.6Time and Date........................................................................................................................27
5.4.7View TWA and Peak..............................................................................................................28
6.Maintenance and Service Personnel Activities..................................................................................29
6.1Removal of SD Card .................................................................................................................................... 29
6.2Installation of SD Card................................................................................................................................. 29
6.3Replacement of Condensation Prevention Packet ........................................................................................ 30
6.4Replacement of Lithium Ion Battery Pack (and Coin Cell).......................................................................... 30
Figure 7 External Alarm Connector pin out for ‘Wet’ alarm contacts ............................................................8
Figure 8 External Alarm Connector Pin out for ‘Dry’ alarm contacts.............................................................9
Figure 9 Power Connector.............................................................................................................................10
Figure 10 Mount CXT on Tripod ..................................................................................................................14
Figure 11 Attach Sensor Brackets to Tripod..................................................................................................14
The Detcon SmartWireless® CXT controller (Figure 1) is a multi-channel mobile gas detection control
system that may be wall mounted or mounted on a Detcon tripod accessory. The CXT can be utilized for
self-contained gas detection, display/alarm system package or wirelessly connected to the main network.
The controller offers a non-intrusive magnetic interface with backlit LCD display that supports either
wireless or a hard wire connection to gas detection sensors. The CXT is equipped with an auto configure
system to automatically search for Detcon equipment associated with the controller.
Remote mounted gas detection sensors include any analog 4-20maDC device such as;
Standalone wireless sensors or a maximum of four wired sensors can be monitored by the SmartWireless®
CXT. The SmartWireless® CXT control package is a Division 2 assembly housed in a 316 stainless steel
enclosure that offers various connector options for multiple configurations.
System components of the SmartWireless® gas detection system include;
Sentinel CXT Instruction ManualRev. 1.5Page 1 of 42
Sentinel CXT
alarm stations and
gas detection sensors.
SmartWireless® CXT Controller
The Detcon SmartWireless® CXT controller is a multi-channel mobile gas detection control system
mounted on a tripod or wall mounted. The CXT can be utilized as a self-contained gas detection,
display/alarm system package or wirelessly connected to the main network. The CXT is equipped with an
auto configure system to automatically search for Detcon equipment associated with the controller.
SmartWireless® CX
The SmartWireless® CX Sensor Station is an accessory to the SmartWireless® CXT. The CX wirelessly
transmits the data from up to 4 wired sensors back to the CXT and includes a battery that powers the radio,
alarm devices, and the attached sensors.
Alarm Stations
Alarm stations can be used as part of the gas detection system. Class I Division 1 and Class I Division 2
alarm stations are available. The stations are battery powered and controlled wirelessly by the CXT. The
strobe and horn installed on the CX are activated by the CXT when the alarms levels are reached.
Alarm options for the CXT are as follows:
1. Integral audio visual mounted on the control panel (Class 1; Division 2 Groups A,B,C,D only)
2. Standalone audio visual alarm station (Class 1; Division 2)
3. Standalone audio visual alarm station (Class 1; Division 1)
Gas Detection Sensors
Gas sensors with a 4-20mA output can be connected directly to the CXT. The Detcon CXT-IR and CXTDM sensors are designed to be used wirelessly with the SmartWireless® CXT.
CX Sensor
Station
12VDC Annuciator
Devices
* Maximum of 4
Devices
CX Sensors
* Maximum of 4
Sensors
11.VDC,
<2 Amp total
CXT Controller
Detcon Battery
Charger
(Plug-In VAC Outlet)
* Conducted only in
Safe Area
Wireless Alarm
Station
11.VDC,4-20mA
Signal input
* Maximum of 4
CXT Sensors
* Maximum of 32
CXT Sensors
CX Sensors
Sensors
Figure 2 CXT Controller System Integration Description
Sentinel CXT Instruction ManualRev. 1.5Page 2 of 42
Sentinel CXT
Figure 2 provides a complete systematic description of the CXT Controller System with Integration
Options.
Associated Accessories
The accessories associated for the CXT Controller product are as follows:
Detcon Tripod
Detcon Battery Charging Accessory
Detcon Division 2 cables (various)
Detcon Programming Magnet
Detcon Operators Manual
1.2 Optional Components
Optional components for the SmartWireless® CXTController are as follows:
reset switch
two or four sensor ports
strobe
horn
external ‘Wet’ or ‘Dry’ alarm port
1.3 Alarms and Fault Condition
The CXT alarms are used to activate annunciating devices when a gas reading exceeds a user-configured
threshold. There are three alarms (Alarm1, Alarm2 and Alarm3) and a fault condition. If installed, the
strobe is associated with Alarm 1, and the horn is associated with Alarm2. The external alarm connector
provides all alarm outputs (alarm 1, 2 and 3) for connection to external alarm devices. There are two types
of external alarm connectors: ‘Wet’ and ‘Dry’. The ‘Wet output connector provides 12V outputs for
external alarms. The ‘Dry’ output connector provides dry contacts for external power to control external
alarms. The field configurable user interface permits the user to set alarm values and fault conditions to
cause an assigned relay to fire, triggering external alarm devices. The assigned relay outputs will return to
normal state when a gas alarm or a fault condition clears. When the alarm level is reached either the
devices mounted to the box or attached to the external alarm connector are activated, or both. An external
manual switch can be wired to the CXT, acting as an acknowledge/reset switch (Section 1.12).
When the CXT is in alarm, the display will remain on the channel group with the alarm. The user can
manually cycle to any group page that exists using the arrow switches. After a time out period, the CXT
will resume page cycle protocols based upon the existence of alarms/faults. Four LED indicators on the
front panel show alarm/fault alarm output status and are labeled respectively as ALM 1 (yellow), ALM 2
(yellow), ALM 3 (red), and FAULT (blue).
All alarms can be configured as Energized/De-Energized, Latching/Non-Latching and Silenceable/NonSilenceable for the relays.
Energized Mode
The normally open contact is closed if the alarm level has not been reached or if the sensor is not in fault.
Energized mode provides for fail-safe operation since a loss of power or cable failure will cause the contact
to be open.
De-Energized Mode
The normally open contact is open if the alarm level has not been reached or if the sensor is not in fault.
Sentinel CXT Instruction ManualRev. 1.5Page 3 of 42
Sentinel CXT
Silenceable
The corresponding alarm LED and relay can be deactivated by acknowledging the Alarm Silence function
on the front panel of the CXT controller or by activating the external acknowledge switch if installed
(Section 1.12 and 5.2.2).
Non-Silenceable
The corresponding alarm LED and relay will remain activated until the cause of the alarm or fault is clear.
Latching Mode
The relay can only be deactivated by acknowledging the Alarm Reset function on the front panel of the
CXT controller or by activating the external reset switch if installed (Section 1.12 and 5.2.2).
Non-Latching Mode
The relay is deactivated as soon as the sensor alarm or fault condition is clear.
SmartWireless® CXT is powered by an internal rechargeable Smart Battery capable of delivering
continuous operation in a no alarm condition for two to eight weeks depending on the quantity and type of
sensors tied to the control panel. The internal re-chargeable battery pack shall only be charged in a nonhazardous area where the required operating temperature limits are 0C to +40C. It may be used in the field
and be discharged in the temperature range of -20C to +60C.
The internal re-chargeable battery pack shall only be charged in a non-hazardous
area where the required operating temperature limits are 0C to +40C. Charging
CAUTION
CAUTION
CAUTION
The internal battery can only be recharged in a non-hazardous area and only using the Detcon supplied
Battery Charger Accessory that runs on AC power.
Detcon ApprovedBattery Charger Accessory Ratings:
AC Input Power
Voltage: 100-240 VAC, 50-60 Hz (requires correct PN version for optional 110 or 220 VAC use)
Current: 2.0 Amps maximum
DC Output Power
Voltage: 24+/- 1 VDC
Current: 3.1 Amps maximum
Sentinel CXT Instruction ManualRev. 1.5Page 4 of 42
outside this temperature range may degrade the life of the battery pack.
The Battery Pack Detcon PN 360-3S6PFP-290 contains an internal protection
circuit which maintains its safe operation against all potential hazard conditions.
No other Battery Pack except Detcon PN 360-3S6PFP-290 may be used in the
operation of this device.
Sentinel CXT
NOTE 1
No other Battery Charger or VDC input power source may be used with this CXT
Controller product.
1.5 LCD Main Display Function
The main display is an 11/4" x 6" backlit LCD that is four lines by forty characters and displays up to eight
configured channels at one time. The four internal magnetic switches are located above the backlit LCD
display and offer basic navigation for a complete configuration of the controller (Section 5).
Real time sensor status includes;
channel number,
gas concentration,
device tag (gas type) and
alarm/fault status.
Each channel displays the current status of three alarm levels and a fault condition on the front panel LED
indicators.
1.6 Radio Module
The SmartWireless® CXT offers a wireless option to connect it to other devices wirelessly. The Radio
Module includes a transceiver that operates at 2.4GHz and conforms to non-licensed radio frequency usage
worldwide. Spread spectrum technology supports integrity and security for the wireless network.
The SmartWireless® CXT and CX products use a wireless network with a mesh topology. If radio
communication directly between two devices is impossible due to distance or obstruction, each wireless
device is capable of locating an alternate route through an additional wireless device to communicate with
the designated device. This innovative technology is designed to create a robust network that automatically
routes around congestion and line-of-sight obstacles while improving throughput as subscriber device
density increases.
The radio module is housed in a black ABS box mounted inside of the CXT stainless steel enclosure. The
standard package includes two PCAs mounted inside the black ABS box (radio PCA and Smart battery
charging PCA), 5 dB antenna, and a protective antenna cover. The battery PCA includes circuitry to safely
recharge the battery from a 24VDC input and a fuel gauge circuit to monitor the charge remaining in the
battery.
The radio PCA includes a 2.4Ghz radio and a rotary switch for setting the RF channel of the system (Figure
3). Use a small screwdriver to rotate the switch until the arrow points to the desired RF channel number (16
channels available, 0h-Fh).
NOTE
The radio module is required to have a Modbus address. This address should always be set to F0h. The
radio PCA includes a pair of rotary switches to set this address (Figure 3).
NOTE
All devices within the network must be on the same RF channel to operate correctly.
The switch for the most significant digit (MSD) is on the right and the least significant digit
(LSD) is on the left.
Sentinel CXT Instruction ManualRev. 1.5Page 5 of 42
Sentinel CXT
Modbus
Address LSD
Switch
RF Channel
Selector Switch
Modbus
Address MSD
Switch
Figure 3 SmartWireless® CXT Radio Module
1.7 Sensor Inputs
The SmartWireless® CXT includes a Sensor Input PCA that accepts 4-20mA inputs from up to 4 attached
sensors. The PCA includes two rotary switches to set its Modbus address (Figure 4). This address is set to
01 for SmartWireless® systems using a CXT or Model X40 controller. If an MCX-32 controller is being
used, this address needs to be unique for each CXT in the system. For an MCX-32 system, the addresses
should start at 40h and continue sequentially for each CXT in the system.
Sensor ConnectorRatings
Voltage: 9-11.2 VDC
Current: 100 mA max through any single sensor connector
Modbus Address
LSD Switch
Modbus Address
MSD Switch
Figure 4 Sensor Input PCA
Four "quick connects" on the side of the CXT are for sensor connection (Figure 5), supply power to the
sensor from the internal battery and accept the 4-20mA signal from the sensor.
NOTE
Sentinel CXT Instruction ManualRev. 1.5Page 6 of 42
Power supplied to the sensors is 11VDC. Any attached sensor must be designed to work at
this voltage level.
Sentinel CXT
The four sensor input lines are fused at the PC board level for safety purposes. These fuses are not
designed for field replacement and shall not under any circumstances be attempted to be changed out by
anyone but Detcon Factory trained Service personnel.
These PC board mounted fuses are not designed for field replacement and shall not
under any circumstances be attempted to be changed out by anyone but Detcon
CAUTION
Factory-Trained Service personnel.
Enclosure
PCB
3
4
Shld(Green) 4
PWR(Red) 3
4-20mA (White) 2
GND(Black) 1
Sensor Connector
2
1
1
1
(White) 4-20mA
(Red) PWR
(Black)GND
(Green) Shld
Sensor
Cable to Sensor 1
Figure 5 Sensor Input Connector Pin-out
1.8 Alarm Outputs
The SmartWireless® CXT can optionally include an internal Relay PCA for activating alarm annunciators.
The Relay PCA includes four Class I Division 2 Groups A,B,C,D relays. If the SmartWireless® CXT
includes an attached strobe and/or horn, these devices are also activated by the Relay PCA.
Each Relay PCA must have a unique Modbus address. The Relay PCA includes a single rotary switch to set
its Modbus address (Figure 6). The most significant digit of the address is hard-wired to “8”. The least
significant digit (LSD) is controlled by the rotary switch. The Relay PCA addresses should start at 80h and
continue sequentially for each SmartWireless® CXT in the system.
Alarm Relay Connections
Modbus™
LSD Address
Modbus™
Connections
Internal Alarm
Connections
Figure 6 Relay PCA
Sentinel CXT Instruction ManualRev. 1.5Page 7 of 42
Sentinel CXT
If the Smart Wireless® CXT is ordered with the Relay PCA option, the Relay PCA can be configured to
provide either ‘Wet’ or ‘Dry’ contacts for external annunciator activation. The ‘Wet’ contact option
provides a nominal 11V Battery Power to external annunciators when an alarm is initiated. These wet relay
outputs are rated for 9-11.1 VDC, 2A max total (A1, A2, A3, and FLT outputs combined). The ‘Wet’
contacts are available on a 5 pin Alarm Connector (Figure 7). These outputs are specifically meant for
external 12V annunciators such as the external A1 C1D2 Horn, which is designed to operate on the unit’s
12V Battery.
‘Wet’:
Relay Connector Ratings
Voltage: 9-11.2 VDC
Current: 2 Amps max through single relay connector (2 Amps max total across 4 connectors.
When utilizing ‘Wet’ contacts, the maximum power that can be drawn by the
annunciators is 2A.
CAUTION
3
4
5
GND(Black) 1
1
Alarm Connector
2
1
12V Battery Power
12V Return
COM
FAULT
ALARM 3
ALARM 2
ALARM 1
COM
COM
COM
Enclosure
NC
NO
NC
NO
NC
NO
NC
NO
FAULT(BLUE) 5
ALARM 3(Brown) 4
ALARM 2(Gray) 3
ALARM 1(White) 2
Relay PCA
Figure 7 External Alarm Connector pin out for ‘Wet’ alarm contacts
The Smart Wireless® CXT is also available with ‘Dry’ relay contacts (Figure 8). Dry relay Contacts allow
the user to control annunciators that operate off an exterior power source that relies on the controller to
provide only contact closure to apply voltage to the annunciator. The ‘dry’ relays are rated for 120220VAC/24VDC, 2A max. It is important to note that the ‘Dry’ contact feature utilizes a common return
for all annunciators.
Sentinel CXT Instruction ManualRev. 1.5Page 8 of 42
Enclosure
Sentinel CXT
3
4
2
1
1
6
Alarm Connector
(Pin 2 is not used)
FAULT
ALARM 3
ALARM 2
ALARM 1
NC
COM
NO
NC
COM
NO
NC
COM
NO
NC
COM
NO
5
FAULT(Blue) 6
ALARM 3(Orange) 4
ALARM 2(Green) 3
ALARM 1(White) 1
COM(Black) 5
Relay PCA
Figure 8 External Alarm Connector Pin out for ‘Dry’ alarm contacts
1.9 Power Switch
Power to the SmartWireless® CXT is controlled by a power switch located on the bottom of the enclosure
(Figure 1). Pressing this switch while the power is off will turn the CXT on. Pressing the switch while the
power is on will turn the power off.
1.10 Power Connector
The internal battery inside the SmartWireless® CXT controller can be recharged by connecting 24VDC to
the power connector on the side of the enclosure (Figure 1). A VAC/24VDC battery charging adapter is
included with every CXT.
Detcon ApprovedBattery Charger Accessory Ratings:
AC Input Power
Voltage: 100-240 VAC, 50-60 Hz (requires correctly selected 110 VAC or 220 VAC Charger)
Current: 2.0 Amps maximum
DC Output Power
Voltage: 24+/- 1 VDC
Current: 3.1 Amps maximum
The SmartWireless® CXT must be charged with the Detcon supplied Battery
Charger. (Detcon P/N: 976-0003BC-00T for 110VAC and P/N 976-0003BC-220
CAUTION
for 220VAC ). Use of any other charger may damage the controller.
Sentinel CXT Instruction ManualRev. 1.5Page 9 of 42
Sentinel CXT
Pin 2
Pin 1
+24VDC (White) 3
GND (Black) 2
Chassis GND (Green) 1
Figure 9 Power Connector
Pin 3
1.11Secure Digital Card (SD Card)
The SmartWireless® CXT controller contains a factory installed SD card on the PCA (printed circuit
assembly) that allows data logging. The SD card can be removed (Section 6) and viewed on a computer
using Detconꞌs Log File Viewer application.
Removal or installation of the SD Card shall only be done in a non-hazardous
Warning
location.
1.12Remote Alarm Reset/Acknowledge Switch
An optional remote Alarm Reset/Acknowledge switch enables the user to reset or acknowledge alarms
without having to open the CXT enclosure. The switch is an open push button mounted on the side of the
enclosure.
1.13Remote I/O Cabling Accessory and Safe Use
The I/O cabling option designed for the CXT Controller and its safe use is described in the cabling
Speciation section in Section 10.1. A specific list of Detcon approved cabling option lengths are given in
the Spare Parts List.
Security clips, which require a tool for removal, are provided and are required for all I/O Turck connector
based cables. All Turck connectors should have the security clip engaged at all times except for when
disconnecting them in the safe area.
Use only Detcon specified cable accessories described in this Manual to maintain
the Division 2 rating and safe use of this product.
CAUTION
Security clips, which require a tool for removal, are provided and are required for
all I/O Turck connector based cables. Turck connectors should have the security
clip engaged at all times except for when disconnecting in the safe area.
Sentinel CXT Instruction ManualRev. 1.5Page 10 of 42
Sentinel CXT
CAUTION
2. Safety Guidelines for Safe Use
If equipment is used in a manner not specified by Detcon, the protection provided by the equipment may be
impaired. It is mandatory to read and follow all of the Safety Warnings and Cautions listed below.
Explosion Hazard. Do not make any disconnections while the circuit is live or
Warning
unless the area is known to befree of ignitable concentrations.
Warning
Warning
Warning
Warning
Warning
Charging of the internal Battery Pack shall never be done while equipment is
located in the Division 2 hazardous area. The equipment must be moved to a nonhazardous indoor location area for the battery charging to take place.The
temperature during the indoor battery chargingshall be between 0-40C.
Explosion Hazard. Do not remove or replace the SD Card unless power has been
disconnected or the area is known to be free of ignitable concentrations of
flammable gases or vapors.
Explosion Hazard. Do not remove or replace the Lithium Ion Battery Pack unless
power has been disconnected or the area is known to be free of ignitable
concentrationsof flammablegases or vapors.
Substitution of any component may impair suitability for Division 2 use.
Exposure to some chemicals may degrade the sealing properties of materials used
in the following devices used in this equipment; namely the Div2 Strobe, relay
contacts, and magneticprogrammingswitches
Sentinel CXT Instruction ManualRev. 1.5Page 11 of 42
Warning
risk.
CAUTION
DANGER
Warning
Sentinel CXT
All Turck cable connectors have dust/water sealing caps that are mandatory to be
installed on any connector that is not actively connected to a cable.This is
required to maintain the safety rating of this device. These caps are tethered
adjacent to each of the connector fittings for convenient connection.
The user must consult this manual for more information about any location marked
with this symbol.
Danger of electrical shock. User must ensure that power has been disconnected
prior to installation or servicing of the equipment.
When moving the base CXT controller unit, handle it with 2 hands securely
around the body of the unit so as to prevent a possible dropping or lifting hazard.
Warning
Warning
Warning
Warning
When wall mounting the CXT Controller unit, make sure to have 2 people
working together and follow the recommended wall mounting instruction in
Section 3.1.9, which requires suitable securement that holds four times the weight
of the unit. This will prevent chances of a dropping hazard during the installation
or prevent the risk of the unit falling off from the wall mount.
When moving or manipulating the CXT Controller unit mounted to the Tripod
Assembly, 2 people are required to work together to avoid possible lifting
Do not place your fingers in the areas of the sliding tripod legs as there is risk of
hand injury. Personnel should wear safety gloves while moving and setting up the
tripod assembly.
To avoid accidental tip-over risk of injury, press and anchor the 3 pointed legs of
the tripod deep and firmly into the soft ground. If the ground is too hard for use
of the point, use an independent anchored pin and a short chain connecting to each
leg to secure the unit.
To avoid a tripping hazard, hang a brightly colored flag type marker half down
each tripod leg to provide visual warning of the location of the tripod legs.
To avoid any possible ergonomic risk in interfacing with the CXT unit, make sure
it is installed at a height of 4-5 feet. Place the unit in place where it is easy to
Warning
Sentinel CXT Instruction ManualRev. 1.5Page 12 of 42
access the front of the unit and as possible avoid placing it where there is constant
direct sunlight.
Sentinel CXT
3. Installation
3.1 Initial Setup
The Detcon tripod (P/N 975-TRIPOD-100) provides a stable and mobile base for the SmartWireless®
CXT. A maximum of two sensors can be secured to the tripod using Detcon brackets (P/N 943-004413-
000) installed on the tripod.
1. Unpack the tripod, open the legs and place on a level surface. The tripod must have the 3 legs
extended to widest position possible and be locked in place. The tripod must be firmly located on
level terrain or this is an extreme safety risk of the unit tipping over and causing personnel harm or
equipment damage. As is possible, the points of the tripod legs should be equally plunged into the
ground to make the tripod most firmly stabilized.
The tripod must have the 3 legs extended to widest position possible and be locked
in place. It then shall be firmly located on level terrain or there is an extreme safety
CAUTION
2. Mount the CXT to the center pipe using the supplied U-bolts in accordance with Figure 10. The
height position should be about 4-5 feet maximum to minimize tip-over potential. The U-bolts
should be thoroughly tightened such that there is no vertical slide of the controller up or down the
tripod center pipe. If it slides it may be a safety issue related to personnel injury.
risk of the unit tipping over and causing personnel harm and/or equipment damage.
The installed height position should be 4-5 feet maximum to minimize tip-over
potential. The U-bolts should be thoroughly tightened so there is no chance for
vertical slide of the controller up or down the tripod center pipe. If it slides
CAUTION
NOTE
1. Install the 8" antenna onto the antenna connector on the top right side of the CXT controller (Figure
2. Secure the antenna cover over the antenna.
3. If wired gas sensors are being used with the controller, attach the sensor mounting brackets to the
4. Secure the sensors to the brackets welded onto the tripod using the hook and pin supplied with the
5. Connect sensor cables to the sensor ports on the CXT (Figure 1).
Position the CXT controller on the tripod and position the tripod such that all disconnecting
devices are readily accessible.
1).
tripod legs using the supplied1/4" bolts, nuts and lock washers in accordance with Figure 11.
bracket.
unexpectedly it is a safety issue related to personnel injury and/or tipping over.
Sentinel CXT Instruction ManualRev. 1.5Page 13 of 42
Tripod Center Pipe
21.3"
11.25"
10.25"
12.25"
Sentinel CXT
3.5"
12"
Pipe Mounting U-Bolts
and hardware
Figure 10 Mount CXT on Tripod
Tripod Leg
Mounting
Hardware
4.5"
Sensor with
Mini Condulet
Mounting Plate
Mounting
Support
Figure 11 Attach Sensor Brackets to Tripod
Sentinel CXT Instruction ManualRev. 1.5Page 14 of 42
Sentinel CXT
6. The CXT Sensor can also be wall-mounted using the four holes provided in the mounting brackets.
The method of securing the device to the wall is via all four mounting holes, which shall safely
support four times the weight of the unit. The unit’s weight is 17 lbs = 7.7 Kg and the safe weight
support requirement is 68 lbs = 31 Kg.
7. The correct wall installation will be attachment to a solid plywood structure of minimum 0.5”
thick. The recommended mounting bolt specification is a 3/8”-16 x 1-1/2” long 316SS hex head
bolt. The recommended nut and washer components are a 3/8”-16 316SS hex nut and 3/8”-16
316SS flat washer. The unit should be marked and measured for wall mounting at approximately
four feet height. The unit shall be held up to wall to mark off the location of the four outer spread
mounting holes located on the two mounting ears of the enclosure. Four clearance holes of 0.5”
OD should be drilled through the wood. The unit is then held up in place and the bolts are passed
through the enclosure mounting ear holes and the wood. On the back side of the wood, an assistant
should secure the washers and hex nuts to hand tight torque.
The method of securing the device to the wall is via all four mounting holes, which
shall safely support four times the weight of the unit. The unit weight is 17 lbs =
CAUTION
7.7 Kg and the safe weight support requirement is 68 lbs = 31 Kg. This is required
to avoid the unit from unexpectedly falling off and causing a safety hazard.
NOTE
Position the wall mounted CXT controller such that all disconnecting devices are readily
accessible.
8. If the unit is ordered with the optional external A1 C1D2 Horn, the horn should be mounted either
on the tripod, or on a separate tripod. The optional A1 C1D2 Horn requires the cable for the
External ‘Wet’ Alarms.
a. The horn should be wired to the ‘Wet’ Alarm Output cable per Figure 12.
b. The alarm Cable should be connected to the External Alarm Connector on the controller.
Turck Alarm Cable
from Sentinel
Gray
White
Black
Green/Yellow
Red
Black
C1D1 Cable Assembly
To
Horn
12-24 Alarm
Terminal PCA
Figure 12 A1 C1D2 Alarm Connections
Sentinel CXT Instruction ManualRev. 1.5Page 15 of 42
Sentinel CXT
Battery Installation
9. Loosen the screws holding the door panel in place, and swing the front door of the enclosure open
to gain access to the battery bracket.
Figure 13 Enclosure
10. Unplug the connector from the transceiver, and move it out of the way to gain access to the screws
holding the battery bracket in place. There should be enough of a service loop to safely move this
connector out of the way for removal/installation of the battery bracket.
Figure 14 Connector to Transceiver
Sentinel CXT Instruction ManualRev. 1.5Page 16 of 42
Sentinel CXT
11. Remove the 6-32 screws and washers holding the battery bracket is place, and remove the bracket
from the enclosure. Retain the screws and washers for installation of the bracket with the battery
pack.
Figure 15 Battery Bracket in position
12. Install the battery pack in the bracket. The battery will fit snugly into the holder, being somewhat
held in place by the foam padding in the bracket.
Figure 16 Battery and Battery Bracket
Sentinel CXT Instruction ManualRev. 1.5Page 17 of 42
Sentinel CXT
13. Position the battery bracket (and battery) with the connector on the left side, and install the battery
and bracket in the enclosure using the 6-32 screws and hardware removed is step 11. Some wiring
may need to be moved out of the way during this process to ensure that the wiring is not caught
under the bracket.
14. Locate the connector mate for the battery connector, and plug the two connectors together.
Figure 17 Battery Connections
15. Re-install the connector to the transceiver (removed in step 10).
16. Cycle power to ensure that the unit powers up. Close the front door panel and screw the front
cover down. The screws should be tightened down to a ‘snug’ fit. These screws do not need to be
tightened down completely, but need to be tightened down enough to give the front door a water
tight seal.
17. Verify normal operation once power is applied to the unit. The unit will cycle through the
following:
•Boot up and display the company name, model, firmware version and COMM ports available.
•Proceed to poll Modbus™ addresses of any attached devices.
•The LCD will then refresh and display the next eight channels and so on until the LCD cycles
back to the first eight channels and repeats the process.
•The blue fault LED will remain off.
Sentinel CXT Instruction ManualRev. 1.5Page 18 of 42
Sentinel CXT
4. Recharging the Internal Battery Pack
4.1 Non-Hazardous and Indoor Location
At a safe time interval prior to full discharge of the internal battery pack, relocate the CXT Controller to a
non-hazardous indoor location area that has suitable 110 VAC or 220 VAC AC power receptacles
available.
4.2 Connecting to Mains Supply
Using the appropriate Battery Charging Accessory product (PN 976-0003BC-00T for 110 VAC or PN 976-
0003BC-220 for 220 VAC), find the corresponding Mains Supply receptacle in an indoor non-hazardous
area and plug-in the pronged end of the cable. Connect the Turck connector to the external port labeled
external power. Turn on the power switch and begin charging. Operate the charger for the necessary time
it takes to accomplish a full charge.
Only the Mains supply cord that is supplied with the Detcon-approved Battery
Charger Accessory product shall be used. Use of any other Mains supply cords will
CAUTION
Warning
impair the safety of this device.
Charging of the internal Battery Pack shall never be done while equipment is
located in the Division 2 hazardous area. The equipment must be moved to a nonhazardous indoor location area for the battery charging to take place.The
temperature during the indoor battery chargingshall be between 0-40C.
Warning
The charging power supply is only safely rated for indoor use, so use of the Detcon
charging accessoryis limited to indoor non-hazardous areas.
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5. System Configuration
5.1 System Operation
The setup of the controller is critical for proper operation. Modbus™ addresses must be correct on all the
devices connected to the controller before the controller will acknowledge the devices. Each wireless
sensor must have a unique Modbus address (refer to sensor manual for details).
5.2 Operator Interface
5.2.1Magnetic Programming Tool
The magnetic programming tool (Figure 18) is used to operate the magnetic switches. For switch
activation, the programming magnet is briefly held on the switch marker ( ) and then removed. This action
will be referred to as a "swipe" for the remainder of this manual.
Figure 18 Magnetic Programming Tool
5.2.2Front Panel User Interface
The front panel user interface (Figure 19) contains four switches necessary to configure the CXT controller.
S m a rt W i r e l e s s A l a r m & C o n tr o l S y s t e m
Figure 19 Front Panel User Interface
PROG Switch
From the Main Display, the PROG switch enters into the Main Menu. Once inside the Main Menu, the
PROG switch acts as an "Escape" switch that moves backwards in the menu flow chart.
NOTE
Up Arrow Switch
Sentinel CXT Instruction ManualRev. 1.5Page 20 of 42
While in Main Menu mode there are no updates to gas readings and hence no alarms will
take place.
Sentinel CXT
This switch moves the user up the Main Menu flow chart. It is also used to change selected entries in
the menu selections in the upward direction.
Down Arrow Switch
This switch moves the user down the Main Menu flow chart. It is also used to change selected entries
in the menu selections in the downward direction.
ENTER and RESET/ACK Switch
This switch has multi-purpose use:
The ENTER function is used to accept selections in all menu screens and to execute the Reset
and Acknowledge functions.
The Reset function releases all latched relays once the alarm/fault condition has cleared.
The Acknowledge function will disengage any silenceable relays that are in an active state.
This is used to silence alarms once the end-user has assessed the alarm condition.
The RESET/ACKNOWLEDGE function of the switch is only applicable from the Main Display
and not while in Main Menu mode.
5.3 Main Display Functions
When no alarms or faults exist on the SmartWireless® CXT, the Main Display will show the status of all
the sensors in the gas detection system. When the SmartWireless® CXT is in alarm, the LCD display will
stay on the channel group with the channel in alarm. If multiple alarms/faults exist, the CXT will cycle
through group pages with alarms/faults including the transceiver, RL-4/alarm station, and AO-4 group
pages. At any time the user can manually cycle to any group page using the arrow switches. After a time
out period (15 seconds), the CXT will resume page cycle protocols based upon the existence of
alarms/faults.
Four LED indicators on the front panel show alarm and fault alarm output status. The LEDs represent
ALM 1 (yellow), ALM 2 (yellow), ALM 3 (red) and FAULT (blue).
NOTE
The CXT only cycles through sensor group pages when no alarms/faults exist.
5.3.1Sensor Group
XX>YYY "Device Tag"
XX – represents the corresponding channel number
YYY – the gas concentration value
"Device Tag" – Either user enter tag or COMM ERROR.
IN ALARM# = If any channel is in any gas alarm condition, # is the alarm level.
IN FAULT = If any gas channel is in fault.
0 COMM ERR = If any channel is not appropriately communicating with the device.
5.3.2Transceiver Group
WTXX ‘Status’ YYY%
XX – represents the transceiver Modbus slave address.
‘Status’ – Status message of the alarm station.
OFFLINE = Not communicating.
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Sentinel CXT
DC POWER = Communicating; line powered.
BATT ERR = Communicating; cannot read smart battery pack.
LOW BATT = Communicating; smart battery time to empty below the set threshold.
45+ DAYS = Communicating; smart battery pack has more than 45 days before empty.
0-45 DAYS = Communicating; the number of days until smart battery pack is empty.
YYY% - represents the link quality of the transceiver.
5.4 Menu Mode
1. The PROG switch is used to enter the menu mode of the unit by swiping a programming magnet
over the corresponding marker ( ). Once in the menus, all Modbus™ polling stops, sensor values
are not read and alarm outputs are not updated.
NOTE
If the CXT is in alarm when the user enters the menu, it will stay in alarm until they exit the
menu.
2. Upon entering the MAIN MENU, the LCD will display the following:
MAIN MENU
AUTO CONFIGURE SYSTEM
3. Use the down arrow "" switch to move to the next menu item or use the up arrow "" switch to
move to the previous menu item by swiping the programming magnet over the corresponding
markers. Swiping the PROG switch again will return the unit to normal operation.
4. Swipe the ENTER marker when the appropriate menu item is located to enter the menu.
The Main Menu and consists of seven menu items:
1. Auto Configure System
2. Set Channel Alarms
3. Set Relay Function
4. Inhibit & Alarm Test Mode
5. System Diagnostics
6. Time and Date
7. View TWA & Peak
Reference the Menu Flow Chart (Figure 20) to learn how to easily navigate the menus and make changes.
Sentinel CXT Instruction ManualRev. 1.5Page 22 of 42
Sentinel CXT
MAIN DISPLAY
NORMAL OPERATION
MAIN MENU
AUTO CONFIGURE SYSTEM
MAIN MENU
SET CHANNEL ALARMS
MAIN MENU
SET RELAY FUNCTION
MAIN MENU
INHIBIT & ALARM TEST MODE
CHANNELS: ##
AO4S: #
RXT-320S:##
RL4/ALM BANK 1: #
RL4/ALM BANK 2: #
Multiple Channels
ALM1 LEVEL: ##
ALM1 ASCENDING: Y/N
ALM2 LEVEL: ##
ALM2 ASCENDING: Y/N
ALM3 LEVEL: ##
ALM3 ASCENDING: Y/N
Multiple Relays
(Fault, Alm1, Alm2, Alm3)
LATCHING (Bank1): Y/N
ENERGIZED (Bank1): Y/N
SILENCEABLE (Bank1): Y/N
LATCHING (Bank2): Y/N
ENERGIZED (Bank2): Y/N
SILENCEABLE (Bank2): Y/N
INHIBIT MODE: #:##
INHIBIT MODE: START/STOP
ALARM TEST MODE: ON/OFF
1. Ensure that the addresses on all sensors are correctly set.
2. Verify that all 4-20mA inputs are turned on. Only currents above 1.80mA will be detected.
3. Upon entering Auto Configure menu, the LCD will display:
CONFIGURATION SUMMARY
CHANNELS:##AO4S:##WIRELESS TRANSCEIVER WTS:##
RL4/ALARM STATION COUNT:##
[RUN SYSTEM AUTO CONFIGURE]
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Sentinel CXT
4. Swipe the ENTER marker to initiate the search. The CXT controller will perform an incremental
search for available 700/100 and 600 serial sensors starting with Modbus™ address 01h and analog
inputs with a minimum current of 1.80mA.
NOTE
NOTE
NOTE
All sensors must be powered on to be detected correctly.
The channel tags for the analog inputs will be set to “PPM H2S” by default. These can be
changed in the Utilities menu (Section 10.2).
The channel tags for detected serial sensors will be set to gas type and units by default.
These can be changed through the Utilities menu.
5. The search will continue until Modbus™ address 7Fh is reached or until it is terminated by swiping
the ENTER marker which will save the serial sensors. When all of the connected sensors are
identified, swipe ENTER to begin detecting alarm stations with Modbus™ address 80h.
6. The search will continue until Modbus™ address 8Fh is reached or until it is terminated by swiping
the ENTER marker which will save the alarm stations. When all of the connected alarm stations are
identified, swipe ENTER to begin detecting wireless radios with Modbus™ address 01h.
7. The search will continue until Modbus™ address 7Fh is reached or the search is terminated by
swiping the ENTER marker which will save the wireless radio modules found.
NOTE
A swipe of the PROG marker at any time while in search mode will cancel the search and
restore the default settings. Any devices found up to that point will not be saved.
5.4.2Set Channel Alarms
The Set Channel Alarms menu allows configuration of each channel’s alarms. The information to be
configured is the;
2. A flashing cursor will appear on ALM1 LEVEL. Swiping the magnet over:
The markers of the up or down arrows will move the flashing cursor to the desired function.
The ENTER marker will select the function indicated by the flashing cursor
The markers of the up or down arrows will change the value.
The ENTER marker will save the selected value and return to the flashing cursor.
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3. If there is more than one channel, a swipe of the down arrow marker while the flashing cursor is on
ALM3 ASCENDING will scroll the display to the next channel allowing for its configuration. To
return to the previous channel, a swipe of the up arrow marker should be performed while the
flashing cursor is on ALM1 LEVEL.
4. Ensure that the gas alarm relay (if not being used) has a setting of 0 to make it inactive.
For proper compliance with IEC 61010 Safety Standard, it is required that any dangerous level
alarms (those that require possible user action/intervention) shall only be assigned to the Red
NOTE
LED indicator (Alarm Level 3). It is also required for the case in which if only 1 of the 3
possible alarms is chosen to be set, that it shall set to Alarm Level 3 which is the Red LED
indicator.
NOTE
NOTE
Any channels that are in alarm or fault will not display the device tag on the main display.
If the channel range is changed, then the alarm set points must be re-entered.
5.4.3Set Relay (Alarm) Functions
NOTE
1. Upon entering this menu, the LCD will display:
NOTE
If a strobe and/or buzzer are installed on the CXT the relays for alarm 1 and alarm 2 must
be configured as energized.
FAULT RELAY SETUP: BANK 1
LATCHING:X
ENERGIZED:X
SILENCEABLE:X
Relays are displayed in the following order:
•FAULT
•ALARM1
•ALARM2
•ALARM3
2. A flashing cursor will appear on LATCHING for Bank1. Swiping the magnet over:
The markers of the up or down arrows will move the flashing cursor to the desired function.
The ENTER marker will select the function indicated by the flashing cursor.
The markers of the up or down arrows will change the value.
The ENTER marker will save the selected value and return to the flashing cursor.
The down arrow marker while the flashing cursor is on SILENCEABLE for Bank1 will scroll the
display to the next relay allowing for its configuration.
The up arrow marker to return to the previous relay while the flashing cursor is on LATCHING
for Bank1.
3. Repeat Step 2 for the remaining banks containing three alarms and a fault.
4. Ensure that all four relay outputs in all eight banks are set-up to account for the following three
settings (Section 1.3). The values selected can be either Y (Yes) or N (No).
Sentinel CXT Instruction ManualRev. 1.5Page 25 of 42
Latching or Non-Latching
Energized or De-Energized
Silenceable or Non-Silenceable
Sentinel CXT
NOTE
It is generally recommended to set the FAULT relay as energized so that it will trip upon
loss of power.
The FAULT condition is assigned to the FAULT relay as a standard. It cannot be
NOTE
disengaged in the configuration of the controller. The Main Display will show IN FAULT
for any channel that is in fault.
5.4.4Inhibit and Alarm Test Mode
Inhibit mode permits testing of sensors while preventing alarms from being activated. Alarm test mode
permits testing of the attached alarm devices without having to apply gas to the sensors.
1. Upon entering this menu, the LCD will display:
INHIBIT & ALARM TEST MODE
INHIBIT MODE|ALARM TEST MODE:
#:##|
START|OFF
2. These values can be changed by swiping the magnet over the markers of the up or down arrows to
move the arrow prompt "→" to the desired function. A swipe over:
The ENTER marker will select the function indicated by the arrow prompt "→".
The markers of the up or down arrows will change the value.
The ENTER marker will save the selected value.
3. Activate inhibit mode by entering the timer value in minutes and seconds (0-60 minutes).
4. Select START and all relay outputs on the network will be disabled until the timer reaches 0 or is
manually stopped by the user by turning off the inhibit mode.
5. Activate alarm test mode to verify that connected alarm devices are functioning properly by
swiping the magnet over the markers. All channels will simultaneous go from 0 to full scale in 5%
increments. When they reach full scale they will return to 0 in 5% increments. This will continue
indefinitely until alarm test mode is turned off.
6. Verify that the relays fire according to their configuration as the readings cross their respective
alarm set points.
5.4.5System Diagnostics
The System Diagnostics menu performs function tests for the following:
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Upon entering this menu, the SmartWireless® CXT controller will automatically initiate a function test that
displays every pixel LCD display. The controller then performs a function test of the LED drivers by
activating all four LEDꞌs. After the LED test, the controller initiates a test for the external reset switch
which lets the user know when the reset switch is pressed.
The user will be prompted:
1. To "press (swipe) enter key (marker) to continue" which will initiate the relay driver test and the
controller will then reset all the relays and turn on the alarm 1 relay.
2. To "press (swipe) any key (marker)" which will turn on the alarm 2 relay.
3. To "press any key" and the alarm 3 relay will be turned on.
4. To "press any key" and the fault relay will be turned on.
5. To "press any key" and all the relays will be reset.
6. Connect COMM1 (master) to COMM2 (slave) for a Modbus™ loop back test at different baud
rates and “press any key” to continue or swipe any marker to stop the test.
When performing the Modbus™ loop back test, the loop back cable should be installed
NOTE
between the COMM1 (Master) port and the COMM2 (Slave) port. Disconnect all other
external Modbus™ interfaces from the loop and bypass any installed modules.
5.4.6Time and Date
1. Upon entering this menu, the LCD will display:
TIME AND DATE:
##:##:##|##:##:##
|
[TIME][DATE]
2. Verify that [TIME] is selected and swipe the magnet over the ENTER marker to enter the SET
TIME menu.
3. Swipe the magnet over the markers of the up or down arrows to move the arrow prompt "→"to the
desired field.
4. A swipe over the ENTER marker will select the field indicated by the arrow prompt "→" and the
value can be changed by swiping over the markers of the up or down arrows.
5. Another swipe over the ENTER marker will save the selected value.
6. Once the desired values have been set, move the arrow prompt to "Update Time" and swipe the
ENTER marker to update the time with the changes entered.
7. Swipe the magnet over the marker of the down arrow and verify [DATE] is selected.
8. Swipe the magnet over the ENTER marker to enter the SET DATE menu.
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Sentinel CXT
9. Swipe the magnet over the markers of the up or down arrows to move the arrow prompt to the
desired field.
10. A swipe over the ENTER marker will select the field indicated by the arrow prompt and the value
can be changed by swiping over the markers of the up or down arrows.
11. Another swipe over the ENTER marker will save the selected value.
12. Once the desired values have been set, move the arrow prompt to "Change Date" and swipe the
ENTER marker to update the date with the changes entered.
13. A swipe of the PROG marker at any time while setting the time or date will escape out of the
current menu with no changes saved.
5.4.7View TWA and Peak
1. Verify that a secure digital (SD) memory card is installed in the SD slot of the CXT controller
board (J9).
2. Upon entering this menu, the user can view the data recorded from the SD card and is displayed as:
The sensor readings are continuously logged to the SD card. This data can also be viewed by removing the
SD card (Section 6) and inserting it in a laptop using the Detcon Log File Viewer application. Refer to the
Detcon Log File Viewer instruction manual for detailed information.
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6. Maintenance and Service Personnel Activities
Only service or maintenance related activities as described below in Sections 6.1 - 6.5 (but
NOTE
The following is a list of items that are supplied standard with the CXT Controller. They can also be
purchased for service or maintenance needs. These components are only to be supplied by Detcon as part of
this product configuration. No substitutions are allowed.
excluding 6.4.2) are allowed to be performed by the on-site un-certified service personnel.
Any other required service or maintenance related activity shall only be performed by a
Factory-Certified Detcon technician.
Any maintenance or servicing performed outside the allowable scope of this section
CAUTION
may impair the safe operation of this device.
6.1 Removal of SD Card
1. Relocate the CXT controller to a non-hazardous area. Remove power from the CXT Controller by
turning the power switch to OFF. Open the hinged door to gain access to Display PCB unit on the
back of the hinged door.
2. Locate the SD slot (J9) on the back of the controller’s PCA and remove the SD card.
3. Data on the SD card can be viewed using Detcon’s Log File Viewer PC application.
Explosion Hazard. Do not remove or replace the SD Card unless power has been
disconnected or the area is known to be free of ignitable concentrations of
Warning
flammable gases or vapors. Removal or installation of the SD Card should only be
done in a non-hazardous location.
6.2 Installation of SD Card
1. Remove power from the CXT Controller.
2. Locate the SD slot (J9) on the back of the controller’s PCA and install the SD card.
3. Re-Apply power to the unit. The controller will automatically format the card and create the
necessary files for data logging. Refer to Section 5.4.7 for more information regarding the data
logging feature.
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6.3 Replacement of Condensation Prevention Packet
On an annual or bi-annual basis, the Condensation Prevention packet should be exchanged with a new
packet. Remove the CXT Controller to a non-hazardous area and turn power OFF. Open hinged door and
locate packet. Remove packet and replace with a new packet in the same physical position. Close hinged
door and turn power ON.
6.4 Replacement of Lithium Ion Battery Pack (and Coin Cell)
Explosion Hazard. Do not remove or replace the Lithium Ion Battery Pack unless
power has been disconnected or the area is known to be free of ignitable
Warning
1. If there are any warnings or fault indicators that suggest there is a problem with the lithium ion
battery pack (ie. not charging when expected), it should be removed and replaced. Relocate the
CXT Controller to a non-hazardous area and remove power from the CXT Controller by turning
the power switch to OFF. Open the hinged door to gain access to interior. Locate the four screws
that attach the metal bracket that secures the battery pack. Undo the four screws and set them aside
carefully.Lift metal bracket and expose battery pack. Disconnect the two wire male/female
connector to free the pack. Replace the old pack with a new pack and reverse the directions given
above, making sure the wire connections are made correctly.
concentrations of flammable gases or vapors. Removal or replacement of the
Lithium Ion Battery Pack should only be done in a non-hazardous location.
2. There is a small 3.0 VDC; 0.2 Amp-hr lithium ion coin cell located and soldered onto the Main
PCB that powers the clock. There is no expectation that the coin battery will ever need to be
replaced during the 12 year service lifetime of the product. If it is concluded that it does need
exchange, the unit must be returned to the Detcon Factory for replacement of the coin cell.
6.5 Proper Cleaning Procedure
If the unit requires cleaning, take a clean water-damped wet cloth and wipe off the exterior surfaces of the
unit as required. Allow for air dry. It is not necessary to relocate the unit to a non-hazardous area to
perform cleaning.
6.6 Servicing Risks and Verification of Safe State after Servicing
While performing any of the above-mention user-authorized service activities, proper caution shall be used
to avoid safety risks.
The first protective measure and mandatory requirement is that the CXT controller must be relocated to a
non-hazardous area while performing these functions.
The second protective measure is to make sure the power switch is turned OFF while opening the enclosure
and addressing internal components.
The third protective measure is to use static protection while touching any internal components within the
controller enclosure.
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Sentinel CXT
The fourth protective measure is to follow these instructions properly and secure the hinged enclosure
cover fully closed before returning unit to the hazardous area.
Once all servicing has been completed turn power ON and verify that all configured gas sensors are reading
the correct value and also verify that the battery charge level is correct. Once verified, it is safe to return
the unit to active usage.
Sentinel CXT Instruction ManualRev. 1.5Page 31 of 42
7. Troubleshooting Guide
Sensor COMM Error
Verify all devices are set to the same RF Channel.
Verify all SmartWireless® CXT devices have a unique Modbus ID number.
Verify the Sensor Input PCA and Relay PCA Modbus address are set correctly
Verify the Radio Module Modbus address is set correctly
Sensor Fault
Verify if sensor displays any fault. If so, follow sensor trouble shooting notes.
Verify if sensor cell needs replacement.
Low Battery
Attach external battery charger (this can only be done in an indoor non-hazardous area)
Poor Link Quality
Verify antenna is securely attached to all devices.
Verify obstructions are eliminated or minimized between SmartWireless CXT devices and
controller or other CXT devices.
Slow Gas Response
Some delay in gas response is normal if the network update rate is greater than zero. To increase
response time, reduce the update rate. Reducing the update rate will reduce the battery life for
devices.
Sentinel CXT
SmartWireless CXT not found during controller Auto Configure
Verify CXT device set to correct RF Channel
Verify Radio Module has correct Modbus address
Verify the Sensor Input PCA and Relay PCA Modbus address are set correctly
Verify a proper mA load is present on sensor input. Sensor inputs are not detected unless the mA
input is greater than 1.9mA.
Contact the Detcon Service Department for further troubleshooting assistance at 713-559-9200
Sentinel CXT Instruction ManualRev. 1.5Page 32 of 42
All Technical Service and Repair activities should be handled by the Detcon Service Department via
phone, fax or email (contact information given above). RMA numbers should be obtained from the Detcon
Service Department prior to equipment being returned. For on-line technical service, have the model
number, part number, and serial number of product(s) in question available.
All Sales activities (including spare parts purchase) should be handled by the Detcon Sales Department via
phone, fax or email (contact information given above).
NOTE
NOTE
All additional parts must be supplied by Detcon. Use of parts from a third party will void
warranty and safety approvals.
CXT should only be repaired by Detcon personnel or a Detcon trained representative.
Sentinel CXT Instruction ManualRev. 1.5Page 33 of 42
Sentinel CXT
9. Warranty Notice
Detcon Inc. warrants the SmartWireless® CXT System to be free from defects in workmanship of material
under normal use and service for two years from the date of shipment on the transceiver electronics.
Detcon Inc. will repair or replace without charge any such equipment found to be defective during the
warranty period. Full determination of the nature of, and responsibility for, defective or damaged
equipment will be made by Detcon Inc. personnel.
Defective or damaged equipment must be shipped to the Detcon Inc. factory or representative from which
the original shipment was made. In all cases, this warranty is limited to the cost of the equipment supplied
by Detcon Inc. The customer will assume all liability for the misuse of this equipment by its employees or
other contracted personnel.
All warranties are contingent upon the proper use in the application for which the product was intended and
does not cover products which have been modified or repaired without Detcon Inc. approval, or which have
been subjected to neglect, accident, improper installation or application, or on which the original
identification marks have been removed or altered.
Except for the express warranty stated above, Detcon Inc. disclaims all warranties with regard to the
products sold. Including all implied warranties of merchantability and fitness and the express warranties
stated herein are in lieu of all obligations or liabilities on the part of Detcon Inc. for damages including, but
not limited to, consequential damages arising out of, or in connection with, the performance of the product.
Sentinel CXT Instruction ManualRev. 1.5Page 34 of 42
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10.Appendix
10.1Specifications
System Specifications
Capacity:32 I/O Channels
Sensor Inputs:Up to 4 Analog 4-20mA or up to 32 wireless sensors
Outputs:4 switched alarm outputs, (11VDC)
Warranty:One year
Environmental Specifications
1) Operating Temperature:-20C to +60C (for field use where battery pack is only discharging)
2) Operating Temperature:0C to +40C (for non-hazardous indoor area where battery is only charging)
Storage Temperature:-40C to +85C
Humidity:0-99%RH, non-condensing
Altitude:0 – 2000m
Electrical Specifications
Battery Charger Input:100-240 VAC, 50-60 Hz, Max Current 1.5 Amps
Battery Charger Output:24 +/- 0.1 VDC nominal, Max Current 3.25 Amps
Internal Battery Pack:Rechargeable Lithium–Ion, 9-11.2 VDC, 17.4Ah capacity
External Alarm Connectors:‘Wet’: 9-11.1 VDC, 2A max total (A1, A2, A3, and FLT outputs
combined)
‘Dry’: Dry contact 120-220VAC/24VDC, 2A max
Sensor Input Connectors:9-11.1 VDC, 100mA max per connector
RFI/EMI Protection:Complies with EN61326
Electrical Classification:NEMA 4X, Class I Division 2 Groups A,B,C,D
‘Wet’: Connector style is 5 pin Turck connector with security clip.
‘Dry’: Connector style is 6 pin Turck connector with security clip.
Sensor Input Cables:Use only Detcon cables, termination insulation resistance > 10K ohms
Connector style is 4 pin Turck connector with security clip.
Power Input Cable:Use only Detcon Battery Charging Accessory product
Connector style is 3 pin Turck connector with security clip.
Mechanical Specifications
Display:11/4" x 6" Backlit LCD
Dimensions:12" W x 21.3" H x 4.73" D (including antenna and strobe)
12" W x 12.25" H x 4.73 D (without antenna and strobe)
Wireless Specifications
Frequency:ISM 2.4GHz
Range:Indoor/No Line of Sight – 1,000ft
Outdoor RF Line of Sight– 1.5 Miles
Spread Spectrum:Digital-Sequence Spread Spectrum (DSSS)
Modulation:0-QPSK
Sensitivity:-102dBm (1% PER)
Sentinel CXT Instruction ManualRev. 1.5Page 35 of 42
Sentinel CXT
10.2Utilities
Contact a Detcon representative prior to changing any settings in this section.
Default settings are functional for the majority of applications. Any adjustments
made to other items may cause the controller or various components to not work
CAUTION
SmartWireless® CXT controller advanced setup is accomplished through the Utilities Menu and consists of
9 menu items:
1. Setup Channel Data
2. Set RF Silence and RF Sleep
3. Set Low Battery Alarms
4. Set Modbus Address
5. CXT Low Battery Threshold
6. Module update rates
7. Set COMM Baud Rates
8. Set Modbus™ Timeouts
9. Display Settings
properly.
NOTE
To access the Utilities Menu, advance to the View TWA and Peak menu. Hold the magnet
over the ENTER marker for 20 seconds without removing it.
10.2.1 Set Channel Data
The Setup Channel Data menu configures each channel represented by its assigned sensor or device. When
a sensor or device is added to the controller, the information can be added/modified in this menu.
Information to be configured is as follows:
DEVICE TYPE:XXXTYPE:XXXXXXXXX
ANALOG INPUT:#RL4 BANK:XXX
2. A flashing cursor will appear on SLAVE ID. Swipe the magnet over the markers of the up or down
arrows to move the flashing cursor to the desired function. A swipe over:
The ENTER marker will select the function indicated by the flashing cursor.
The markers of the up or down arrows will change the value.
The ENTER marker will save the selected value and return to the flashing cursor.
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NOTE
The SLAVE ID is the Modbus™ address in hex of the sensor or device being assigned to a
specific channel. This will be a Modbus™ slave device to the X-40 controller.
Device Type Value
The Device Type values available are 100, 700, 600 (Detcon serial sensor models), DA4/DI4 (analog
sensors) or radio module (when analog inputs are in use). Ensure that the appropriate value corresponding
to the sensor or device is assigned to the indicated channel.
Analog Input Value
The Analog Input is only available for analog sensors and devices. Analog sensors (DA4/DI4), the
available value is 1, 2, 3 or 4 corresponding to the input position on the DA-4/DI-4 module. A wireless
radio module, the available value is 1 or 2 corresponding to the input position of the connected sensor.
Decimal Point Value
The Decimal Point value is set to 0, 1 or 2. The number of digits displayed to the right of the decimal point
of the gas concentration value is as follows:
Sensor range is less than 10, this value will be 2.
Sensor range is between 10 and 25, this value will usually be 1.
Sensor range is greater than 25, the value should be 0.
Range Value
The Range value is 1-10,000 and corresponds to the gas range value of the sensor.
NOTE
If the range is changed, the alarm levels will have to be reset.
The range value must match the range on the sensor for proper operation.
CAUTION
Type Value
The Type value is an alphanumeric string of nine characters and corresponds to the tag that is displayed
with the gas concentration value. This field is used to define the gas concentration units and the gas type.
1. Swipe the magnet over the markers of the up or down arrows to modify the first alphanumeric
character indicated by an underscore.
2. A swipe over the ENTER marker will select the displayed value and the next character to be
changed will be indicated by an underscore.
3. Repeat Steps 1 and 2 to update all nine characters.
4. Swipe over the ENTER marker to return to the flashing cursor.
RL4 Bank Value
The RL4 Bank value can be 1, 2, 3, 4, 5, 6, 7, 8, or ALL and defines the total number of banks that the
channels have been assigned. When selected, a new page allows the user to toggle the channelꞌs relay bank
assignments for all eight banks.
1. Swipe the down arrow marker while the flashing cursor is on RL4 BANK to scroll the display to
the next channel allowing for its configuration.
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2. A swipe of the up arrow marker while the flashing cursor is on SENSOR TYPE will return to the
previous channel.
10.2.2 Set RF Silence and RF Sleep
The Set RF Silence and RF Sleep menu allows the user to initiate radio silence for a predetermined amount
of time, over the entire network. RF Sleep terminates communication (sleep command) between all of the
wireless radio modules in the network as a power saving feature. A longer sleep time will increase delay
between alarm conditions occurring and the alarms being activated. RF Silence prevents radios from
interfering with other RF devices on site (remote detonators). This feature will stay on until the user turns it
off, the sensors are not monitored and no alarms can be activated.
1. Upon entering this menu, the LCD will display:
RF SILENCE AND SLEEP
RF SILENCE:|RF SLEEP:
|##:##
XXX|SLEEP:XXX
2. Swipe the magnet over the markers of the up or down arrows to move the arrow prompt "→" to the
desired location. A swipe over:
The ENTER marker for RF SILENCE and SLEEP will toggle the value between ON and OFF.
The ENTER marker for the RF SLEEP will select the function indicated by the arrow prompt
"→".
The markers of the up or down arrows will change the value.
The ENTER marker will save the selected value.
The sleep timer has a range from zero to five minutes and is set in minutes and seconds.
10.2.3 Set Low Battery Alarms
The Set Low Battery Alarms menu establishes low battery alarm thresholds for wireless radio modules
using Detconꞌs Smart Battery Pack interfaced to the controller.
1. Upon entering this menu, the LCD will display:
LOW BATTERY ALARM:
TTE(DD:HH:MM):|SOC(%):
##:##:##|##%
|ALARM STATIONS ONLY
2. To change the TTE (time to empty in days, hours and minutes) and/or SOC (state of charge in
percentage) values, swipe the magnet over the markers of the up or down arrows to move the
cursor to the desired field. A swipe over:
The ENTER marker will select the field indicated by the cursor and enclose the value in
brackets.
While in brackets, the markers of the up or down arrows will change the value.
Another swipe over the ENTER marker will save the selected value.
A swipe of the PROG marker at any time while setting the TTE or SOC will escape out of the
current field with no changes saved.
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The recommended value for the TTE should be five days and applies to all battery powered wireless radio
modules transceivers other than alarm stations. The SOC value applies to alarm stations only and the
recommended value should be 25%. The blue LED on the controller will be activated and begin flashing
when any battery in the network falls below the set thresholds.
10.2.4 Set Modbus™ Address
The SET Modbus™ Address menu establishes the serial address of the X-40 controller when being polled
by another master device through the RS-485 Modbus™ RTU slave port (COMM2).
1. Upon entering this menu, the LCD will display:
MODBUS ADDRESS:
###
2. This value can be changed by performing a swipe:
Over the ENTER marker and then swiping
Over the markers of the up or down arrows.
Another swipe over the ENTER marker will save the selected value.
3. Ensure that the range of values for the Modbus™ address is 1-127 in decimal value.
10.2.5 CXT Low Battery Threshold
CXT gas sensors offer the option to use non-rechargeable batteries. If this option is used, the low battery
alarm is determined by the voltage of the batteries. When the battery voltage falls below the threshold the
low battery fault will be activated.
This value can be changed by performing a swipe:
Over the ENTER marker and then swiping
Over the markers of the up or down arrows.
Another swipe over the ENTER marker will save the selected value.
10.2.6 Module Update Interval
The AO4 outputs and battery life readings from the wireless radio modules on the CXT are updated
periodically. This menu setting controls the rate at which these updates occur. The default rate is 60
seconds.
This value can be changed by performing a swipe:
Over the ENTER marker and then swiping
Over the markers of the up or down arrows.
Another swipe over the ENTER marker will save the selected value.
10.2.7 Set COMM Baud Rates
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The Set COMM Baud Rates menu displays the current baud rate settings for COMM1 (master) and
COMM2 (slave).
Upon entering this menu, the LCD will display:
SET COMM BAUD RATES:
COMM1 BAUD RATE:9600
COMM2 BAUD RATE:9600
NOTE
The value shown is pre-configured to 9600 and should not be altered unless directed to do
so by Detcon factory personnel.
10.2.8 Set Modbus™ Timeouts
The Set Modbus™ Timeouts menu establishes the response timeout for Modbus™ communications and the
inter-poll delay. Response timeout is the amount of time in milliseconds the CXT controller will wait for a
sensor to respond to a poll request. Inter-poll delay is the amount of time in milliseconds the CXT will wait
after receiving a poll response from one sensor before it polls the next sensor. Ten missed poll responses
will result in the sensor being declared in COMM ERR. The range of values for the response timeout is
100-1000 milliseconds and 10-255 milliseconds for the inter-poll delay. The recommended value for the
response timeout is 500 and 150 for the inter-poll delay.
1. Upon entering this menu, the LCD will display:
SET MODBUS TIMEOUTS:
RESPONSE TIMEOUT:###
INTERPOLL DELAY:###
2. Values can be changed by swiping the magnet over the markers of the up or down arrows to move
the arrow prompt "→" to the desired function. A swipe over:
The ENTER marker will select the function indicated by the arrow prompt "→".
The markers of the up or down arrows will change the value.
The ENTER marker will save the selected value.
10.2.9 Display Settings
The Display Settings menu customizes the brightness, contrast and backlight duration of the display.
Values for brightness and contrast range between 0 and 100. Available values for the backlight timeout
function (turn off due to inactivity) are OFF, 10 seconds, 30 seconds and 1 to 5 minutes.
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2. These values can be changed by swiping the magnet over the markers of the up or down arrows to
move the arrow prompt "→" to the desired function. A swipe over:
The ENTER marker will select the function indicated by the arrow prompt "→".
The markers of the up or down arrows will change the value.
The ENTER marker will save the selected value.