Serial port setup Serial port pinout and use
Digi EX15 User Guide
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Connect the network devices to the Digi EX15 serial port using the pinout information in Serial port
pinout and use.
Serial port pinout and use
The RS232 standard requires support for baud rates up to 9600 baud on shielded multicore cable up
to 50 feet (15 meters) long. For the Digi EX15, the use of standard CAT 5 cables enables serial
communication at all baud rates up to 50 feet. CAT5 unshielded twisted pair cable lengths much
longer than 50 feet have been verified at 9600 baud but are non-standard and are not guaranteed.
The Digi EX15 RS232 serial port is DTE and has the following pin configuration:
Pin 1 RTS Request to send Output from Digi EX15
Pin 2 DCD Data carrier detect Input to Digi EX15
Pin 3 RXD Receive data Input to Digi EX15
Pin 4/5 — Ground Signal ground
Pin 6 TXD Transmit data Output from Digi EX15
Pin 7 DTR Data terminal ready Output from Digi EX15
Pin 8 CTS Clear to send Input to Digi EX15
Note Ring indicate (RI) and data set ready (DSR) are not implemented.
The serial port uses a female RJ45 jack to enable connection using UTP Ethernet cabling.
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