IEEE 801.15.4 radio. Detcon products using the RXT-300 have been also designed for low power operation and can be powered using Detcon battery packs and solar panels. Since these units are both wireless and can be set up to be battery/solar powered, they become very mobile and can be deployed without installing a costly wiring infrastructure.
(Human Machine Interface) Station for visual status of the network, the Sensor Station that has one or more sensors attached and the Alarm Station for system alarm indication. These three basic assemblies are then duplicated and located as needed by the customer. Figure 2 shows the Detcon versions of the typical SmartWireless™ assemblies.
Alarm outputs that can be configured to be Energized or De-Energized, Latching or Non-Latching and Silence-able or Non-Silence-able. The RXT-300 can also monitor a single Detcon Smart Battery pack for remaining battery life allowing the user to replace the battery in a timely manner.
The available battery pack is Detcon’s plug-in Smart Battery Pack which provides an output of 12VDC (See Figure 5). If installed, the RXT-300 transceiver will detect the battery and will continuously query the battery pack for remaining battery life.
1.5 Quad Battery Charger (Optional) Detcon’s Smart Battery Pack can be charged as needed using Detcon’s optional Quad Battery Charger which can charge up to four battery packs at one time. The Quad Battery Charger comes with a plug-in AC/DC adapter that plugs into a standard 120VAC outlet for power.
1.6 Solar Panel (Optional) Detcon also offers an optional solar panel to be used in conjunction with the Smart Battery Pack. It provides 24VDC output and connects to the J5 connector of the Model 100 Terminal Board. This option enables continuous operation of the wireless transceiver and charging of the battery pack eliminating the need for external recharging.
RXT-300 SmartWireless™ 2.0 Installation 2.1 Guidelines for Safe Use 1. Install unit only in areas with classifications matching with those described on the approval label. Follow all warnings listed on the label. Figure 8 RXT-300 Approval Label Do not use in areas containing air saturation levels of Acetic Acid, Acetone, Ammonium Hydroxide, Fuel C, Diethyl Ether, Ethyl Acetate, Ethylene Dichloride, Furfural, N-Hexane, MEK, Methanol, 2- Nitropropane, or Toluene.
The J-Box contains the optional Model 100 Terminal Board. If a battery pack is used, Detcon’s custom J-Box is needed to accommodate both the terminal board and the battery pack plus a T-Outlet box with a drain is required (See Figure 9). The RXT-300 wireless transceiver assembly is typically mounted on a wall or pole.
J-Box. Remote separation distances of up to 15 feet are possible with the recommended cable. Such an installation will require an additional J-Box which connects to the separated transceiver and houses Detcon’s 8-position terminal board with Ground board plus additional hardware (See Figure 10).
RXT-300 SmartWireless™ diagram in Figure 11. Reference Table 2 RXT-300 Transceiver Wire Identification for color code identification. NOTE: Wires that are not used should be individually capped off and secured out of the way in the T-Outlet box so that they are not exposed to any active components, power, or ground. 7.
External DC power can be customer provided with an output voltage range between 7 to 30VDC or by Detcon’s optional 24VDC solar charging panel. Both of these alternatives will provide continuous operation of the assembly and can be installed in conjunction with the optional battery pack, providing a constant power source.
Each RXT-300 wireless transceiver provides outputs for up to four alarms (Alarm 1, Alarm 2, Alarm 3 and Alarm 4) which can drive relays on custom terminal boards provided by Detcon. The outputs are controlled by the RXT-300 based upon the configuration and current alarm state of the whole network. The outputs are open drain and rated for up to 300mA at 50V (See Figure 12).
Figure 12 Internal Alarm Output Circuit Detcon alarm terminal boards are available that allow either AC or DC/Battery operation with the relays built onto the board. These boards provide a complete solution to connecting an RXT-300 to power and providing high-current relay closures.
C interface for the transceiver consisting of a serial clock (SCL) and serial data line (SDA). These are used to monitor the status of the battery pack (if installed). 2.3.6 Programming Data, Clock & Reset These connections are used to program the RXT-300 transceiver and should be used by Detcon personnel only. 3.0 System Operation The gas detection system built with the RXT-300 SmartWireless™...
RXT-300 SmartWireless™ each poll a different RXT-300 is queried and will transmit its data stored locally to the rest of the RXT-300s on the network. This continues until all RXT-300s are polled across the network. As part of the polling process the Master RXT-300 will also transmit its own data to the network at the appropriate time.
Detcon Alarm Stations that can operate off of a single Detcon Smart Battery pack will have two alarm devices attached. Alarm devices were selected to minimize the power consumption and yet maximize the alarm coverage.
The HMI LEDs will follow the state of the alarm outputs and are labeled ALM 1, ALM 2, ALM 3 and FAULT. Alarm 4 in Detcon detection systems is usually mapped to fault conditions such as communication errors or sensor faults where Alarm 1-3 are usually mapped to threshold settings for sensors 3.4.1 Alarm Output Properties...
RXT-300 SmartWireless™ 3.4.3 Alarm Setup Summary In summary, there are alarm events that are generated for multiple conditions around the system. For every alarm event they can be either ignored or they can be mapped into one of four Alarm Outputs. Alarm Zones provides additional mapping of these Alarm Outputs to specific groups of RXT-300s.
RXT-300 SmartWireless™ Alarm Reset Only valid for Alarm Outputs with Latched property set. Will de-activate an Alarm Output that is Latched, but NOT if there is an existing Alarm. After alarm reset, a new Alarm event will cause latching of Alarm output again. Alarm Silence Only valid for Alarm Outputs with Silence-able property set.
HMI Station, Sensor Station or Alarm Station. To accommodate these different applications the RXT-300s within a system must be configured accordingly. This is done using the Detcon RXT-300 Wireless Configuration Tool (WCT) which allows the user to build the system configuration. The user will save the final configuration to a file on the WCT and then load it wirelessly to all of the RXT-300s that are part of that system configuration.
RXT-300 SmartWireless™ Wireless Network The wireless network is the RF Channel and Network ID that the system will use to communication between RXT-300s. The main purpose here is to select a wireless network that is not in use by any other RXT-300s and that has minimum RF interference.
Device Type This defines the type of sensor that is in use. If it is a Detcon based sensor such as a 100 Series or 700 Series sensor most of the other parameters will be filled out since it is a known device. A device type of “Other” can be selected and all parameters will need to be entered manually.
The reading register is the one display on the HMI Station and is used to process Alarms based upon the thresholds set. If a Detcon sensor type is selected in the list of device types, these parameters will be filled in automatically. If “Other” is selected these will need to be set manually and include the starting register address, the number of registers and the reading register.
RXT-300 SmartWireless™ NOTE: RXT-300s will only communicate with other RXT-300s with the same network ID and RF channel. NOTE: Suggest using same Network ID as RF Channel which would allow for up to 16 systems (RF Channel / Network ID = 0-15). If configure two or more systems on same RF Channel but different Network IDs that are nearby they will have to share that channel, consequently it will take longer to poll and will cause data retransmits to occur.
Device Type The user can select from a pre-defined list of Detcon devices or sensors which will populate many of the rest of the parameters for the user. A device type of “Other” allows the user to add their own Modbus™ based device and then enter the parameters manually.
Generally set to 100 but defines the range of readings that will be read from a device. For 4-20mA devices the Detcon a reading of 400 to 2000 represents 4mA to 20mA. If a range of 100 is entered internally the RXT-300 will translate Alarm thresholds entered later into the appropriate 4-20mA thresholds internally.
Each RXT-300 would be configured to perform the proper translation. This is specifically used with Detcon 100 series sensors which are factory set to be fixed at Modbus™ address = 1. So if there were five 100 series sensors in a system there would need to be at least 5 RXT-300s where each would translate the unique system address to the local address = 1.
RXT-300 SmartWireless™ 5.2.1 Modbus™ Exceptions The RXT-300 is capable of returning Modbus™ exceptions when it cannot service a Modbus™ request meant for that RXT-300. By default this is turned off in the configuration since it can cause issues with some controllers that do not process Modbus™...
5.3.1 Register – Detcon Type The Detcon Type is a unique identifier of the type of device and associated register map. A controller can therefore perform a search and determine what Detcon devices are present on a Modbus™ system. A controller can look for this value when search Modbus™...
5.3.4 Register – Battery Info If a Detcon battery pack is connected to the RXT-300 transceiver, there are multiple registers associated with information about that battery. The RXT-300 utilizes the I2C interface to read battery status and only one Detcon battery pack can be read per RXT-300.
RXT-300 SmartWireless™ 5.3.7 Register – Radio Software Version This is set to a value based upon the version of software programmed into the RXT-300 radio. It is stored as two byte value representing the major and minor revision numbers. So a 0106h (262 decimal) represents a major version of 01 and minor version of 06.
Replace condensation prevention packet. 7.0 Warranty Detcon, Inc., as the manufacturer, warrants under intended normal use each new Model RXT-300 wireless transceiver to be free from defects in material and workmanship for a period of one year from the date of shipment to the original purchaser.
RXT-300 SmartWireless™ 8.1 Spare Parts Part Number Spare Parts 976-000300-316 RXT-300 Wireless Transceiver Part Number Optional Accessories 897-850800-010 NEMA 7 Aluminum Condulet Base 897-850400-010 NEMA 7 Aluminum Condulet Solid Cover 897-850902-010 NEMA 7 Tall Aluminum Condulet w/Window Cover (Required for Battery Option) 960-202200-000 Condensation prevention packet (For condulet, replace annually) 800-004221-000...
RXT-300 SmartWireless™ 8.2 Revision Log Revision Date Changes made Approval 05/19/10 Original Release. 11/12/10 Update to table 1 Wire Identification 01/03/12 Extensive revision and detail added to all aspects of manual. RXT-300 Wireless IM Rev. 2.0 Page 36 of 41...
RXT-300 SmartWireless™ Programming Reset White/Violet Programming Data White/Green Programming Clock White/Blue RXT-300 Power (+) Red Ground (-) Black Wireless Modbus B (-) White Transceiver Modbus A (+) Blue SDA White/Brown SCL White/Black mA Green Solar Panel/ Power (+) Red Ground (-) Black DC Power Jumper Settings W I R E -...
RXT-300 SmartWireless™ RXT-300 Wireless Transceiver Programming Reset White/Violet Programming Data White/Green Programming Clock White/Blue SDA White/Brown Solar Panel/ SCL White/Black DC Power Power (+) Red Ground (-) Black Ground (-) Black Modbus A (+) Blue Power (+) Red Modbus B (-) White W I R E L E S S W I R E L E S S P R O G R A M...
RXT-300 SmartWireless™ mA Yellow mA Green Programming Reset White/Violet Programming Data White/Green RXT-300 Programming Clock White/Blue Power (+) Red Wireless Ground (-) Black Transceiver Modbus B (-) White Modbus A (+) Blue SDA White/Brown SCL White/Black Solar Panel/ Power (+) Red Ground (-) Black DC Power Jumper Settings...
Need help?
Do you have a question about the SmartWireless RXT-300 and is the answer not in the manual?
Questions and answers