Detcon X40-32-N7 - Manual (Page 36)

Model X40
Model X40 Instruction Manual Rev. 3.3 Page 30 of 64
4-20mA
INPUT
COMM
M
S
D
L
S
D
Sensor 2
Sensor 1
Sensor 3
Sensor 4
Figure 30 Model DA-4 4-20mA Input Module and 4-20mA Gas Sensors
Serially address each DA-4 module in hex using the two rotary switches on the front of the module
labeled MSD (most significant digit) and LSD (least significant digit). Ensure that each DA-4 module
has a unique Modbus™ address and is addressed within the range 01h-7Fh.
NOTE
DA-4 modules must be connected to the RS-485 Master Port, they must be addressed
correctly within the range of 01h-7fh.
NOTE
The sensors must be powered on and outputting at least 1.8mA to be detected by the auto
configure. If a sensor is in fault, its output will be 0mA and it will not be detected by the
auto configure.
A DA-4 module connected properly to the controller will have a flashing DATA COMM LED to indicate a
valid communication status and will provide the controller with a continuous reading of the sensor
attached. All other information will need to be modified on the Channel Details screen for each channel
corresponding to the appropriate DA-4 module.
3.3 Dry Contact Inputs (DI-4)
Relay contact outputs from field devices can be connected to Model DI-4 input modules. There are four
relay contact inputs in each Model DI-4 module (See Figure 31). DI-4 modules can be installed on the DIN
rail of the controller. DI-4 modules must be connected to the RS-485 Master Port.