B
Cellular Antenna
F
Radio Binding Button
H
ISM Radio Connection
C
Radio LED
G1
RS-485 Jumpers
J
Modbus Slave ID DIP Switches
D
Radio Module Antenna
G2
RS-232 Jumpers
K
Rotary Dials
L
SAM4 Processor Board Connection
5.1.1 DIP Switches for the I/O Board
The DXM150-Sx Wireless Modbus Slave I/O board DIP switches are set from the factory to Modbus Slave ID 11. For more
information, refer to
Setting the Modbus Slave ID on the I/O Base Board
.
5.1.2 I/O Board Jumpers
Hardware jumpers on the DXM I/O board allow the user to select alternative pin operations. Turn the power off to the device
before changing jumper positions.
Jumper
Function
Positions
E
Courtesy power output
Jumper 2 is the power jumper for pin 45. Jumper 1 is the power jumper for pin 35.
•
The pin 45 jumper selects 2.7 V when in the "a" position and 12 V battery in the
"b" position.
•
The pin 35 jumper selects 4.2 V when in the "a" position and device power on
pin 2 in the "b" position.
G1
RS-485 Modbus Slave or
RS-232 Flow Control
Defines the operation of pins 11 and 12. Set the jumpers to use pins 11 and 12 as a
secondary Modbus RS-485 slave port or flow control pins for the RS-232 port. Both
jumpers must be set to the same operation, RS-485 Modbus Slave or Flow control.
The default setting is RS-485.
G2
Generic RS-232 Serial Port or
CAN Serial Port
Defines the operation of pins 9 and 10. Set the jumpers to use pins 9 and 10 as a CAN
serial port or a generic RS-232 serial port. Both jumpers must be set to the same
operation, CAN or RS232.
The default setting is CAN serial port.
G3
Analog output characteristics
for AO2 (pin 32) and AO1 (pin
33)
Defines current (0–20 mA) or voltage (0–10 V) for analog output 1 and 2.
By default, current (0–20 mA) is selected using jumpers 1 and 2 and registers 4008 and
4028 contain a value of 2.
To select voltage (0–10 V) for output Aout1, set jumper 1 in the voltage position (V) and
set Modbus register 4008 on the I/O board (SID 200) to 3.
To select voltage (0–10 V) for output Aout2, set jumper 2 in the voltage position (V) and
set Modbus register 4028 on the I/O board (SID 200) to 3.
5.2 Applying Power
Apply power to the DXM Modbus Slave using either 12 to 30 V dc or a 12 V dc solar panel and 12 V sealed lead acid
battery.
If the incoming voltage drops below 11.2 V dc, the cellular modem does not turn on and will not turn on until the voltage is
above 11.8 V dc. A text file (CmVMon.txt) on the internal micro SD card saves the periodic sampling of the incoming
voltage. If cellular operation stops because of voltage, it is logged in this file.
Pin
Description
Pin 1
No connection
Pin 2
12 to 30 V dc input (+) or solar panel connection (+)
Pins 3, 5, 8, 13, 18, 24, 25,
31, 34, 36, 41, 44, 48
Main logic ground for the DXM Modbus Slave
Pin 4
Solar or backup battery positive input. Battery voltage must be less than 15 V dc. Use only a sealed lead acid (SLA)
battery.
DXM150-Sx Wireless Modbus Slave
24
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