Detcon SW-HMI-32-N7 - Manual (Page 6)

HMI Panel Instruction Manual
SmartWireless HMI Panel Instruction Manual Rev. 1.0 Page 2 of 20
power LCD with back light and ultra low power components that extend operating time for 1-2 months
before a recharge is required. Additionally, an optional solar charging panel can be used to extend
operating time for virtually any application.
SmartWireless HMI Panel
RXT-300
Transceiver
Serial Number
Plate
www.detcon.com Houston, Texas
SW HMI Mounting Plate
Term Board & Smart Battery
Figure 2 SW HMI Panel N7 Assembly
1.2 System Operation
The heart of the SW HMI is the non-intrusive magnetic interface with backlit LCD display. The display
receives real time data from RXT-300s using RS-485 Modbus™ RTU protocol. The SW HMI includes a
primary Modbus™ interface (COMM1 Master) used to receive concentration and status directly from the
RXT-300 transceiver (Slave) being monitored. A secondary Modbus™ interface (COMM2 Slave) is also
available which is used for communication with another remote display where the SW HMI is seen as a
slave device. The SW HMI panel only monitors the network and does not perform the actual polling of
sensors and processing of alarms. It only provides the user a visual status of the system including fault
conditions and managing of alarm events such as alarm inhibit/reset/silence. Wiring of an external manual
switch is also available to act as an Acknowledge/Reset button. This switch comes preinstalled for the
N4X enclosure and is optional for the N7 enclosure (See section 3.3 Optional Remote Alarm
Reset/Acknowledge Switch (N7 Enclosure)).
1.3 RXT-300 Wireless Transceiver
The wireless function of the SW HMI panel is made possible by Detcon’s RXT-300 wireless transceiver.
This transceiver transmits signal data such serial Modbus™ and can support up to 32 devices. It operates at
2.4GHz and conforms to non-licensed radio frequency appliance usage around the world. Wireless
network integrity and security is accomplished using direct sequence spread spectrum wireless mesh
technology. Wireless applications can be as simple as a single field device communicating with an SW
HMI panel or any number of field devices forming a network of subscribers. Every device in the network
is capable of functioning as a router and repeater for all other devices in the network. This means that
subscribers can “hop” through neighboring devices to communicate with each other thereby widening
network access points. This unique and 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 RXT-300 also provides a network wide control processing
capability. Refer to its instruction manual for more detailed information.