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IPEX
(IP Electronix)
PH485iX
:
User’s Manual
Page 9 of 12
Doc No. : PH485iX-UM-001
21 August 2019
7.
RS-232 Signals
DCE
(PH485iX)
DTE
(PC,PLC,RTU, …)
If Required
1 (DCD)
1 (DCD)
Necessary
2 (RXD)
2 (RXD)
Necessary
3 (TXD)
3 (TXD)
If Required
4 (DTR)
4 (DTR)
Necessary
5 (GND)
5 (GND)
If Required
6 (DSR)
6 (DSR)
If Required
7 (RTS)
7 (RTS)
If Required
8 (CTS)
8 (CTS)
Data Direction Indicator:
The Blue light on the top of device blinks if there is a data stream from (RS-232 or TTL
USART) to (RS-485 or RS-422) side (Transmit), also the Yellow light blinks if there is a data stream from (RS-485
or RS-422) to (RS-232 or TTL USART) side (Receive).
8.
TTL USART Signals
DCE
(PH485iX)
DTE
Microcontroller
Necessary
GND2
GND
Necessary
TXD
TXD
Necessary
RXD
RXD
Connecting Method:
Connect GND2 to Microcontroller Board’s GND, Connect TXD directly to TXD of
Microcontroller and RXD directly to RXD of Microcontroller if your Microcontroller has TTL (0~5V) Logic.