Getting Started: I-8437-80/8837-80/8417/8817, Jul 2020 V2.0 69
3.18
Using N-Port COM
Using I-81xx (Low Profile) serial communication module on the I-8xx7 can add multiple COM
ports.
I-8112: 2-ch RS-232 Expansion Module
I-8114: 4-ch RS-232 Expansion Module
I-8142: 2-ch RS-422/485 Expansion Module
I-8144: 4-ch RS-422/485 Expansion Module
I-8142i: 2-ch Isolated RS-422/485 Expansion Module
Note:
I-81xx series modules can only be plugged in slot 0 to 3 of the I-8xx7, the rest of the slots are not
available. Thus, only COM5 to 20 can be added, a total of 16 COM ports.
The following ISaGRAF functions can be used to read/write these COM Ports.
"COMOPEN", "COMCLOSE", COMREADY", "COMARY_R", "COMARY_W", "COMREAD",
"COMSTR_W", "COMWRITE" and "COMCLEAR".
Visit to the website to download the ISaGRAF User’s Manual, and refer to
Appendix A.4
for
https://www.icpdas.com/en/download/show.php?num=333
Pin assignment:
Visit the website for more information about
I-81
1: RS-232 4: RS-485
Channels
i: Isolated
