NetModule NB3000-Line-Hd, Руководство пользователя

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NB3000-Line-Hd User Manual 4.2
RS-485 Port Specification (Option Sa)
The RS-485 port has the following specification (bold characters show the default configura-
tion):
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 V
DC
Internal bus termination none
Max. cable length 10 m
Cable shield mandatory
Cable type Twisted Pair
Max. number of transceivers on
bus
256
Max. number of nodes 256
Table 3.30.: RS-485 Port Specification
EP Pins Signal
1 / 5 GND
2 / 6 TxD − /RxD − (A)
3 / 7 TxD
+
/RxD
+
(B)
4 / 8 −
Table 3.31.: Pin Assignments of RS-485 Port Signals (EP1 / EP2)
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