Technical Description - SeaLevel COMM+8.422.PCIe User Manual

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
1 Port 1 TX+ (O)
2 Port 1 CTS+ (I)
3 Port 1 RX+ (I)
4 Port 1 TX+ (O)
5 Port 1 RTS– (O)
6 Port 1 RTS+ (I)
7 Port 1 RX– (I)
8 Port 1 CTS– (I)
9 Port 2 TX+ (O)
10 Port 2 CTS+ (I)
11 Port 2 RX+ (I)
12 Port 2 TX+ (O)
13 Port 2 RTS– (O)
14 Port 2 RTS+ (I)
15 Port 2 RX– (I)
16 Port 2 CTS– (I)
17 GND
© Sealevel Systems, Inc. 7802ec &7802ecS Manual | SL9680 11/2022
Pin# RS-422/485
18 GND
19 Port 3 TX+ (O)
20 Port 3 CTS+ (I)
21 Port 3 RX+ (I)
22 Port 3 TX+ (O)
23 Port 3 RTS– (O)
24 Port 3 RTS+ (I)
25 Port 3 RX– (I)
26 Port 3 CTS– (I)
27 Port 4 TX+ (O)
28 Port 4 CTS+ (I)
29 Port 4 RX+ (I)
30 Port 4 TX+ (O)
31 Port 4 RTS– (O)
32 Port 4 RTS+ (I)
33 Port 4 RX– (I)
34 Port 4 CTS– (I)
(I) = Input
(O) = Output
Pin# RS-422/485
35 Port 5 TX+ (O)
36 Port 5 CTS+ (I)
37 Port 5 RX+ (I)
38 Port 5 TX+ (O)
39 Port 5 RTS– (O)
40 Port 5 RTS+ (I)
41 Port 5 RX– (I)
42 Port 5 CTS– (I)
43 Port 6 TX+ (O)
44 Port 6 CTS+ (I)
45 Port 6 RX+ (I)
46 Port 6 TX+ (O)
47 Port 6 RTS– (O)
48 Port 6 RTS+ (I)
49 Port 6 RX– (I)
50 Port 6 CTS– (I)
51 GND
Pin# RS-422/485
52 GND
53 Port 7 TX+ (O)
54 Port 7 CTS+ (I)
55 Port 7 RX+ (I)
56 Port 7 TX+ (O)
57 Port 7 RTS– (O)
58 Port 7 RTS+ (I)
59 Port 7 RX– (I)
60 Port 7 CTS– (I)
61 Port 8 TX+ (O)
62 Port 8 CTS+ (I)
63 Port 8 RX+ (I)
64 Port 8 TX+ (O)
65 Port 8 RTS– (O)
66 Port 8 RTS+ (I)
67 Port 8 RX– (I)
68 Port 8 CTS– (I)
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