Delta RPI-M20A - 5.2.2. Power Meter; 5.2.3. Energy Log

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Table 5-6 Definition of RS 485 pin
PIN
FUNCTION
4
DATA-
5
DATA+
7
VCC(+12V)
8
GND
Terminal Resister
Terminal Resister
PIN FUNCTION
4
5
7
8
DATA-
DATA+
VCC(+12V)
GND
Data Format:
Baud rate: 9600
Data bits: 8
Stop bit: 1
Parity: N/A
Pin Layout:
120Ω(1/2W)
DATA+ to DATA-
120Ω(1/2W)
DATA+ to DATA-
RS485/USB
or
RS485/RS232
Figure 5-7 Multi-inverter connection illustration
Table 5-7 RS-485 data format
RS-485 Data format
Baud rate
9600
Data bit
8
Stop bit
1
Parity
N/A
Tabel 5-8 Terminal resister setting
OFF
ON
1 2
OFF OFF
ON
ON
ON
ON
OFF
OFF
SW
Terminal
Resistor
ON
1 2
SW ON
SW OFF