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© Sealevel Systems, Inc. 3588 Manual | SL9008 9/2022
Physical Connection
The port signals for the SIO-104-+8.485 are physically connected via two 40-pin box headers located at
board position J2 (Ports 1-4) and J1 (Ports 5-8). Several cable options are available. The following table
shows the connector pinout for the 40-pin headers.
Ports 1-4 (J2)
PORT PIN RS-485
1
36
DATA +
34
DATA -
28
GND
2
27
GND
21
DATA -
19
DATA +
3
18
DATA +
16
DATA -
10
GND
4
9
GND
3
DATA -
1
DATA +
Ports 5-8 (J1)
PORT PIN RS-485
5
36
DATA +
34
DATA -
28
GND
6
27
GND
21
DATA -
19
DATA +
7
18
DATA +
16
DATA -
10
GND
8
9
GND
3
DATA -
1
DATA +
All pins not listed are no connects.
