TDE Instruments Digalox DPM72 Instruction Manual

1. Description
®
The Digalox DPM72 devices with Modbus interface can communicate as master or
slave with other DPM72 devices or devices from other manufacturers via the
Modbus RTU protocol. Values from the device are available as display values,
values from other devices can be integrated into the display as remote values. In
master mode, values can also be exchanged between two slaves with the help of a
buffer.
2. Specification
• 8 data bits, 1 stop bit
• Baud rate: adjustable up to 500,000 baud
• Parity: none, even, odd, space, mark
• ¼ unit load, up to 128 participants
• External terminating resistor required
3. Electrical connections
DPM72
A
A
GND
B
4. Configuration – general
To configure a device, disconnect it from the Modbus network, short-circuit terminal
J8 and connect the device to a PC using an RS485 USB adapter. "RS485 config"
appears on the display (if available), the device can now be configured using the
"Digalox ® Manager" software. After completing the configuration, open J8 again. For
devices with a display, all values that are to be transferred must also be visible on
the display. Devices without a display provide the first four configured display
values. By setting jumpers J4-J6, different display values are provided accordingly.
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Digalox DPM72 RS485/Modbus interface
Instruction manual (Rev-2022-07)
R = 120 - 270 Ω (external terminating resistor)
t
R
t
620 Ω
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