14
© Sealevel Systems, Inc. 7802ec &7802ecS Manual | SL9680 11/2022
Technical Description
The Sealevel Systems 7802ec provides a PCIe interface adapter with eight (8) asynchronous serial ports
providing versatile RS-422/485 interfaces for industrial automation and control applications.
The 7802ec provides UARTs with 256 byte TX and RX FIFOs, programmable baud rates, data format, and
interrupt control.
Micro 68-pin Female Connector Pin Assignments
The 7802ec includes a Micro 68-pin female connector for attaching the included cable (Part Number
CA231).
RS-422/485 (CA-231 DB-9) Connector Pin Assignments
Pin#
RS-422/485
Pin#
RS-422/485
Pin#
RS-422/485
Pin#
RS-422/485
1
Port 1 TX+ (O)
18
GND
35
Port 5 TX+ (O)
52
GND
2
Port 1 CTS+ (I)
19
Port 3 TX+ (O)
36
Port 5 CTS+ (I)
53
Port 7 TX+ (O)
3
Port 1 RX+ (I)
20
Port 3 CTS+ (I)
37
Port 5 RX+ (I)
54
Port 7 CTS+ (I)
4
Port 1 TX+ (O)
21
Port 3 RX+ (I)
38
Port 5 TX+ (O)
55
Port 7 RX+ (I)
5
Port 1 RTS– (O)
22
Port 3 TX+ (O)
39
Port 5 RTS– (O)
56
Port 7 TX+ (O)
6
Port 1 RTS+ (I)
23
Port 3 RTS– (O)
40
Port 5 RTS+ (I)
57
Port 7 RTS– (O)
7
Port 1 RX– (I)
24
Port 3 RTS+ (I)
41
Port 5 RX– (I)
58
Port 7 RTS+ (I)
8
Port 1 CTS– (I)
25
Port 3 RX– (I)
42
Port 5 CTS– (I)
59
Port 7 RX– (I)
9
Port 2 TX+ (O)
26
Port 3 CTS– (I)
43
Port 6 TX+ (O)
60
Port 7 CTS– (I)
10
Port 2 CTS+ (I)
27
Port 4 TX+ (O)
44
Port 6 CTS+ (I)
61
Port 8 TX+ (O)
11
Port 2 RX+ (I)
28
Port 4 CTS+ (I)
45
Port 6 RX+ (I)
62
Port 8 CTS+ (I)
12
Port 2 TX+ (O)
29
Port 4 RX+ (I)
46
Port 6 TX+ (O)
63
Port 8 RX+ (I)
13
Port 2 RTS– (O)
30
Port 4 TX+ (O)
47
Port 6 RTS– (O)
64
Port 8 TX+ (O)
14
Port 2 RTS+ (I)
31
Port 4 RTS– (O)
48
Port 6 RTS+ (I)
65
Port 8 RTS– (O)
15
Port 2 RX– (I)
32
Port 4 RTS+ (I)
49
Port 6 RX– (I)
66
Port 8 RTS+ (I)
16
Port 2 CTS– (I)
33
Port 4 RX– (I)
50
Port 6 CTS– (I)
67
Port 8 RX– (I)
17
GND
34
Port 4 CTS– (I)
51
GND
68
Port 8 CTS– (I)
(I) = Input
(O) = Output