Delta Din-rail Power Meter DPM-D520I User Manual
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3.3.2
Communication Characteristics
Communications Specifications
Max. Communication
Distance
1200 m
Baud Rate
2400, 4800, 9600, 19200,
38400 bps
Max. Connection
Number
32
Data Length
7-, 8-bits
Communication
Protocols
Modbus RTU/ASCII,
Parity
None, Odd, Even
Function Code
03, 06, 10, FE
Stop Bits
1, 2
Note:
The 7-bit data length is not available for the Modbus RTU protocol.
Use shielded twisted-pair cables for RS485 communication. When connecting multiple devices in series,
use the wiring method in the following diagram.
Connect the D+ communication terminal for all devices on the same twisted pair cable. Connect the D-
terminals on another twisted pair cable. Ground the cable shield. Install a terminal resistor on the terminal
device as shown.
Use cables with a diameter of 14–28 AWG.
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