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© Sealevel Systems, Inc.
3612 Manual | SL9115 9/2021
Technical Description, continued
25 Pin Connector Signal Layouts (DB-25 Male)
RS-232 Signals
Base+5, M3-M0=2, 0010
Signal
Name
Pin #
Mode
GND
Ground
7
RD
Receive Data
3
Input
CTS
Clear To Send
5
Input
DSR
Data Set Ready
6
Input
DCD
Data Carrier Detect
8
Input
TM
Test Mode
25
Input
TXC
Transmit Clock
15
Input
RXC
Receive Clock
17
Input
TSET
Transmit Signal Element Timing
24
Output
DTR
Data Terminal Ready
20
Output
TD
Transmit Data
2
Output
RTS
Request To Send
4
Output
Please terminate any control signals that are not going to be used. The most common way to do
this is connect RTS to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if
not used, will help insure you get the best performance from your adapter
.
