IP Relay HWg-ER02b - Manual
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Connectors
RS-232
1 CD
<--
Carrier Detect
2 TxD
-->
Transmit Data
3 RxD
<--
Receive Data
4 DTR
-->
Data Terminal Ready
5 GND
---
System Ground
6 DSR
<--
Data Set Ready
7 CTS
<--
Clear to Send
8 RTS
-->
Request to Send
9
RI
<--
Ring Indicator
RS-485
1
A
<->
A > B
2
B
<->
A > B