Detcon X40-32-N7 - Manual (Page 44)

Model X40
Model X40 Instruction Manual Rev. 3.3 Page 38 of 64
The 4-20mA signals from the sensors are communicated by the CXT Slave Controller to the X40 controller
using RS-485 Modbus™ RTU protocol. The analog input PCA is serially addressed to the CXT Slave
Controller in hex using the two rotary switches labeled SW2 MSD (most significant digit) and SW1 LSD
(least significant digit). The analog input PCA should have an address of 01h to interface properly with the
CXT Slave Controller. The CXT Slave Controller then communicates with the X40 Controller, and the
CXT Slave Controller then acts as the controlling device to the analog input PCA.
.
NOTE: During Auto Configure, only CXT Slave Controller inputs with an active 4-20mA
signal will be recognized.
3.10 SmartWireless® CX Sentinel Sensor Station
Detcon offers a SmartWireless® CX Sensor Station which can be configured to the X-40 controller if the
wireless option is selected. The CX Sensor Station is a wireless RXT320 device that transmits data from
up to four wired analog sensors back to the X-40 using radios that operate at 2.4GHz and conform to non-
licensed radio frequency appliance usage around the world. Refer to the CX Sensor Station manual for
more detailed information. The CX Sensor Station’s wireless transceiver must reside on the same RF
channel/Network ID as the wireless transceiver of the MCX-32 corresponding to the correct port for the
controller. RF channel/Network ID selection is accomplished using the SW1 rotary switch. The CX
Sensor Station also consists of three different Modbus components that must be addressed accordingly for
proper communication. These three Modbus components are located in the CX wireless transceiver, the
CX relay output PCA and the CX analog input PCA, each requiring unique Modbus addressing as follows:
The wireless transceiver of the CX Sensor Station should be addressed between 01h and 20h when
configured to the RS-485 Master Port. Wireless transceivers are serially addressed in hex using the two
rotary switches on the transceiver (Figure 36). The SW2 rotary switch corresponds to the most significant
digit (MSD) and the SW3 rotary switch corresponds to the least significant digit (LSD).
The relay output PCA of the CX Sensor Station functions similar to an RL4 module and needs to be
addressed and configured as such. The most significant digit (MSD) for the relay output PCA is hard
coded to a hex value of 8 so only the least significant digit (LSD) must be set using the SW1 rotary switch
(Figure 37).
NOTE: The MSD for the relay output PCA is hard coded to a hex value of 8 so only the LSD
must be set. Addressing criteria is the same as RL4’s and Alarm Stations and will be seen as
an RL4 by the Controller.
The analog input card of the CX Sensor Station functions similar to a DA4 module. It is found mounted
under the relay output PCA.
The 4-20mA signals from the sensors are communicated by the CX Sensor Station to the controller using
RS-485 Modbus™ RTU protocol. The analog input PCA is serially addressed in hex using the two rotary
switches labeled SW2 MSD (most significant digit) and SW1 LSD (least significant digit). Refer to Figure
38. Each CX Site Sentinel will have four channels reserved based on its Modbus address with each channel
corresponding to each of its four inputs. The Modbus Addresses should be set between 01h and 7Fh.
NOTE: During Auto Configure only CX Sensor Station inputs with an active 4-20mA signal
will be recognized.