Impulse SIO4-104.2+2 (3544) - Manual (Page 11)

© Sealevel Systems, Inc. - 9 - SIO4-104.2+2 User Manual
Physical Connection
The port signals for the SIO4-104.2+2 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+
Port P4 Signal Name RS-232
19 DCD2
20 DSR2
21 RD2
22 RTS2
23 TD2
24 CTS2
25 DTR2
26 RI2
2
27 GND2
28 GND1
29 RI1
30 DTR1
31 CTS1
32 TD1
33 RTS1
34 RD1
35 DSR1
1
36 DCD1
All pins not listed are no connects.