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© Sealevel Systems, Inc. 7802ec &7802ecS Manual | SL9680 11/2022
DB9 Male Cable Pin Assignments
The 7802ec includes a cable (Part Number CA231) with a Micro 68-pin male connector terminating to eight
DB25 male connectors.
Pin#
RS-422/485
1
RX+ (I)
2
RX– (I)
3
TX– (O)
4
TX+ (O)
5
GND
6
RTS+ (O)
7
RTS– (O)
8
CTS– (I)
9
CTS+ (I)
(I) = Input
(O) = Output
Please terminate any unused control signals. The most common way to do this in RS-422/485
mode is to connect RTS+ to CTS+ and RTS- to CTS-. Terminating these pins, if not used, will help
ensure the best performance from the adapter.
