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Multifunctional serial to Ethernet module user manual
www.usriot.com
Jinan USR IOT Technology Co., Ltd
Page27
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9
14
+5V
+5V power
15
LED_LINK
Ethernet link LED
16
+3.3V
+3.3V power
17
RXD1
Uart1 receive data pin
18
TXD1
Uart1 transmit data pin
19
RXD2
Uart2 receive data pin
20
TXD2
Uart2 transmit data pin
21
CTS0
Default no use. Uart0 clear to send
22
RTS1
Default as 485_en for Uart1, Uart1 require to
send
23
CTS1
Default no use. Uart1 clear to send
Diagram 4-10 connector interface(include uart0, uart1, uart3)
Note:
1)
There is no RTS2 and CTS2 pin for UART2 on this module, so that means, you can not
use Hardware flow control(RTSCTS), or RS485 tx and rx control pin for the last serial
port.
4.2.5.
4.2.5.
4.2.5.
4.2.5. hardware
hardware
hardware
hardware connection
connection
connection
connection
Diagram 4-11 a connection sample
Note
ED2 already have a network transformer on board.