Switch Power Enable Register
Voltage Register
Default Output Register
Output Register
2 (pin 21)
2251
Write a 0 to turn OFF
Write a 1 to turn ON (default)
3621
Write a 0 to select 5 V (default)
Write a 1 to select 16 V
3622
506
Enable Register
Configuration registers that turn on the ability to use the switched power output.
Default setting = ON
Voltage Register
Configuration registers that define the output voltage to the switched power output.
Default setting = 5 V
Default Output Register
Configuration registers that turn on the switched power outputs for continuous power out.
Set register to 1 for continuous power. Cycle power if this register is changed.
Default setting = 0
Modbus Output Register
Turn on or turn off the voltage output. If both outputs 505 and 506 are turned on at the same time but are set to
different voltages, the output voltage is 5 V for DXM100-B1 models and set to the lower voltage setting for
DXM100-B2 models.
5.2.2 Associating a Switched Power Output to an Input
Switched power 1 and 2 (pins 30 and 21) can be associated to any Universal input to apply power a sensor, take a
reading, and then remove power from the sensor. This conserves power in battery-operated systems.
The switched power supply can be used in one of two different ways: supplying courtesy power to an output pin or
associated to an input. (Only one method can be active at a time.)
Use the following configuration parameters to define the courtesy power supplied to a switched power output pin.
Courtesy Power Output Configuration Parameters 1
Modbus Registers
Switched Power 1
Switched Power 2
Switched Power Enable
2201
2251
Voltage
3601
3621
Default Output
3602
3622
Output Register
505
506
Default Output
Set the register value to 1 for continuous power. The default setting is 0.
Cycle power if this register value is changed.
Switched Power Enable
Enables the switched power supply. Set to 1 to enable; set to 0 to disable.
This does not enable the supply output to the actual output pin. To enable the supply output to the output pin, set
Modbus register 505 or 506 to 1. Set to 0 when associating the switched power supply to an input.
Output Register
Write to the Output register to turn on or turn off the voltage output.
If both Output Registers 505 and 506 are turned on at the same time, but are set to different voltages, the output
voltage is 5 V for DXM100-B1 models and set to the lower voltage setting for DXM100-B2 models.
1 Only used when supply courtesy power to the output pin, not when associating switched power to an input.
DXM100-Bx Wireless Controller Instruction Manual
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