Detcon X40-32-N7 - Manual (Page 42)

Model X40
Model X40 Instruction Manual Rev. 3.3 Page 36 of 64
Modbus at the Modbus address assigned to the transceiver enabling analog inputs to be configured
automatically with the Auto Configure function of the MCX-32.
The two 4-20mA inputs are accessible when an RXT-320 transceiver is connected to Detcon’s optional
Model 100 Terminal Board. ‘AIN1’ on connector J8 corresponds to analog input one and ‘AIN2’ on
connecter J7 corresponds to analog input two. During an Auto Configure, a 4-20mA signal must be active
on these inputs in order for the controller to recognize them
NOTE: If the RXT-320 is used for Analog inputs the Device Type in the configuration must
be set properly for the X40 Controller to recognize the RXT as an analog input device.
NOTE: If only one analog input is to be used, it is recommended to interface the mA output of
the sensor to AIN1.
J6
J7
J4
J1
J5
J8
L9
J2
A IN
1
W
/B
K
W
/B
N
W
/B
U
W
/G
N
W
/V
WIRELESS
A IN
2
M
A
G
N
D
P
W
R
POWER IN
( SOLAR)
WIRELESS
PROGRAM
B A
G
N
D
24
V
MODBUS OUT
( WIRELESS)
24
V
G
N
D A B
MODBUS IN
24
V
G
N
D A B
SENSOR
P
W
R
G
N
D
S C
L
S
D
A
S
P
1
S
P 2
DISPLAY
JP1
SW2
SW1
TERM
PROGRAM
Figure 35 Model 100 Terminal Board
The 4-20mA signals from the RXT-320 transceivers are communicated wirelessly to the controller using
RS-485 Modbus™ RTU protocol therefore each wireless transceiver must have a unique Modbus™
address.
Wireless transceivers are serially addressed in hex using the two rotary switches on the
transceiver’s smart terminal board (Figure 35). SW2 corresponds to the most significant digit (MSD) and
SW1 corresponds to the least significant digit (LSD). Each analog input has a specific channel assigned in
the controller and is dependent on the Modbus address set from the smart term board.
All other
information will need to be modified on the Channel Details screen for each channel corresponding to the
appropriate RXT-320 analog input.
3.9 SmartWireless® CXT Sentinel Slave Controller
Detcon offers a SmartWireless® CXT Site Sentinel Slave Controller which can be configured to the X40
controller if the wireless option is selected. The CXT Sentinel Slave Controller is a wireless RXT320
device that transmits data from up to four wired analog sensors back to the X40 wirelessly using radios that
operate at 2.4GHz and conform to non-licensed radio frequency appliance usage around the world. Refer
to the SmartWireless® CXT manual for more detailed information. The CXT Slave Controller’s wireless
transceiver must reside on the same RF channel/Network ID as the wireless transceiver of the X40. RF
channel/Network ID selection is accomplished using the SW1 rotary switch. The CXT Slave Controller
address must be unique, and should be set between 01h and 7Fh.