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© Sealevel Systems, Inc. 12000 Manual | SL9245 10/2021
Serial Ports 1 and 2 are RS232 interface capable of data rates up to 921.6 kbps. These ports are available
on 2 DB9 connectors on P5. Standard IEA-232 pin out is used. Port 1 is the DB9 connector closest to the
PCB. Port 2 is the DB9 connector farthest from the PCB.
Pin #
Signal
Name
Mode
1
DCD
Data Carrier Detect
Input
2
RD
Receive Data
Input
3
TD
Transmit Data
Output
4
DTR
Data Terminal Ready
Output
5
GND
Ground
6
DSR
Data Set Ready
Input
7
RTS
Request To Send
Output
8
CTS
Clear To Send
Input
9
RI
Ring Indicator
Input
