Beckhoff CB4053 Manuel d'utilisateur Page 35

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Serial Interface COM1 Chapter: Connectors
Beckhoff New Automation Technology CB4053 page 35
4.14 Serial Interface COM1
The serial interface is a standard IDC socket connector with a spacing of 2.54 mm. Signals default to
RS-232 but can also be ordered as RS-422 or RS-485.
The port address and the interrupt are set via the BIOS setup.
CAUTION
COM 1 & 2 cables are not the same pin orientation and you may damage the COM interface and CPU
attached if you use the incorrect COM cable.
Description Name Pin Name Description
data carrier detect DCD 1 2 DSR data set ready
receive data RXD 3 4 RTS request to send
transmit data TXD 5 6 CTS clear to send
data terminal ready DTR 7 8 RI ring indicator
ground GND 9 10 VCC 5 volt supply
Pinout with RS422/485 soldering option:
Description Name Pin Name Description
transmit data + TX 1 2 TX# transmit data -
receive data + RX 3 4 RX# receive data -
reserved N/C 5 6 N/C reserved
reserved N/C 7 8 N/C reserved
ground GND 9 10 VCC 5 volt supply
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