Serial RS232 / RS485 Ethernet Converter Manual – US2000B
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13
Other Functions and Features
Hardware flow control
The RS232 interface supports hardware flow control
（
RTS/CTS
）
Pin name
Description
IO type
RTS
Request to Send
O
CTS
Clear to Send
I
When RTS = 0, enables the other side to send, at this time, TTL is 0 volt, RS232 is -3V ~ -15V.
When CTS = 0, the converter is enabled to send, at this time, TTL is 0 volt, and RS232 is -3V ~
-15V.
User MAC address
The MAC address by default is 6 bytes (0xff): FF-FF-FF-FF-FF-FF.
MAC address example: ac- cf-23-20-fe-3d;
The user can change the MAC address through a web browser.
Enter the new address with ‘-’ between each byte, (it will also work with just a ‘space’ between
each byte). Click ‘Update Settings’ to save the new address, and reset the converter for the
changes to take effect.
