NB2800
User Manual for NRSW version 4.5.0.100
Isolated RS-485 Port Specification (Option Sa)
The RS-485 port has the following specification (bold characters show the default configuration):
Feature Specification
Protocol 3-wire RS-485 (GND, A, B)
Baud rate 600, 1 200, 2 400, 4 800, 9 600, 19 200, 38 400,
57 600, 115 200, 230 400, 460 800
Data bits 7 bit, 8 bit
Parity none, odd, even
Stop bits 1, 2
Software flow control none, XON/XOFF
Hardware flow control none
Galvanic isolation to enclosure 1500 VDC
Internal bus termination none
Max. cable length 10 m
Cable shield mandatory
Cable type Twisted Pair
Connector type RJ45
Max. number of transceivers on bus 256
Max. number of nodes 256
Table 3.28.: RS-485 Port Specification
Pin Signal
1 -
2 -
3 -
4 RxD/TxD (B)
5 RxD/TxD (A)
6 -
7 -
8 RS485_GND
Table 3.29.: Pin Assignments of RJ45 RS-485 Connector
32
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