nader NDW3 Series Manual page 83

Note: 1. The red line represents the RS485 communication line, which is connected from the communication interface of
controller; the black line represents the power supply line; the blue line represents the signal output line of the circuit
breaker secondary terminal to output the circuit breaker status or control signal.
2. The message notification module needs to use a SIM card, which shall be prepared by users.
With the Modbus-RTU mode, connect to the computer system via the conversion interface of
RS485/RS232 and twisted shielded wire line from the controller RS485 interface, or connect the RS485
signal interface of circuit breaker via the serial port server or communication manager, and then
connect with computer via the Ethernet interface (RJ45 interface). Related communication parameters
of Modbus-RTU are shown in the table below.
Communication protocol
Communication address
Baud rate (bit/s)
Distance (to be extended with a repeater)
With the communication network, the same line can connect up to 32 communication circuit breakers (16
drawout circuit breakers) at the same time.
Internal & confidential file
File No.:NDT2920202
第 83 页 共 149 页
Modbus
0~255
9.6k, 19.2k, 38.4k, 115.2k
1200m
File Version:4