Detcon SmartWireless CX - Manual (Page 8)

Sentinel CX
Sentinel CX Sensor Station IM Rev. 1.4 Page 4 of 26
1.5 Radio Module
The SmartWireless® CX offers a wireless option to connect it to the SmartWireless CXT and 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 CX 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
2). Use a small screwdriver to rotate the switch until the arrow points to the desired RF channel number (16
channels available, 0h-Fh).
NOTE All devices within the network must be on the same RF channel to operate correctly.
Each radio module is required to have a unique address. These addresses typically start at 01h and continue
sequentially for each SmartWireless CX in the gas detection system. The radio PCA includes a pair of
rotary switches to set this address (Figure 2).
NOTE
The switch for the most significant digit (MSD) is on the right and the least significant digit
(LSD) is on the left.
Figure 2 SmartWireless® CXT Radio Module
RF Channel
Selector Switch
Modbus
Address LSD
Switch
Modbus
Address MSD
Switch