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© 2021 Multidyne
FN-64-CHAS Product Manual
6.2
Serial Interface Pinout
An RS-232 serial port is provided for system control. This interface uses serial signals with 8 data bits, No
Parity, and 1 Stop Bit (8N1). The standard DE-9 pin configuration is used for a DCE device for the RX, TX and
Ground lines. A straight through cable should be used when connecting between a computer’s RS-232 serial
interface and the device. This interface can be used up to 115.2 Kbits/sec.
This device also comes equipped with an RS-485 serial interface, which provides a 2 wire differential signal
interface for extended distance and high speed applications. This interface is 120 ohm terminated by default for
use as an endpoint of 2 or more RS-485 connected devices.
Pin #
Name
Function
1,4,6,7
NC
Not Connected
2
TX
RS-232 Transmit
3
RX
RS-232 Receive
8
D+
RS-485 Data Positive
9
D-
RS-485 Data Negative
5
GND
Ground
