Manual

© Sealevel Systems, Inc.
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SIO4-104.485 User Manual
Physical Connection
The port signals for the SIO4-104.485 are physically connected via a 40-pin box header.
The following table shows connector P4’s pin-out.
Port P4 Signal Name RS-422 Signal Name RS-485
1 RX4+ DATA4+
3 RX4 - DATA4-
5 TD4 -
7 TD4+
4
9 GND4 GND4
10 GND3 GND3
12 TD3+
14 TD3-
16 RX3- DATA3-
3
18 RX3+ DATA3+
19 RX2+ DATA2+
21 RX2- DATA2-
23 TD2-
25 TD2+
2
27 GND2 GND2
28 GND1 GND1
30 TD1+
32 TD1-
34 RX1- DATA1-
1
36 RX1+ DATA1+
All pins not listed are no connects.