Beckhoff CX1020 Series, Hardware Documentation

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Product
overview
Embedded PC 39
CX1020-N030/40 connections
The CX1020-N030 system interface features two RS232 interfaces, COM1 and COM2 (9 pin Sub-D plug connector).
If there is need for more than two serial interfaces two further RS232 interfaces, COM3 and COM4 (9 pin Sub-D plug
connector) can be added to the system via the system interface CX1020-N40. The maximum baud rate on all
channels is 115 kBit. The pin assignment for all interfaces is equal and described below. The interface parameter can
be set in the operating system or in the PLC program.
RS232 COM interface (connector):
Pin assignment COM interface:
PIN Signal Type Description
1 DCD Signal in Data Carrier Detected
2 RxD Signal in Receive Data
3 TxD Signal out Transmit Data
4 DTR Signal out Data Terminal Ready
5 GND Ground Ground
6 DSR Signal in Dataset Ready
7 RTS Signal out Request to Send
8 CTS Signal in Clear to Send
9 RI Signal in Ring Indicator
Note
The system interface CX1020-N30 can only be used
instead
and
not simultaneously
with system
interface CX1020-N031.
The system interface CX1020-N40 can only be used
instead
and
not simultaneously
with system
interface CX1020-N041.