Only the data pins (TX and RX) are necessary for a loop back test. Unless you need to test the modem control signals (RTS,…
Will RS-530 serial devices work with Sealevel RS-422 or RS-485 serial interfaces?
Yes. An RS-530 to RS-422/485 interface cable will be required to match up the signal pin outs of the interfaces. Use the CA176 cable…
I’m having problems with my USB serial device under Windows XP.
There are known issues with the USB driver built into Windows XP SP1 (Service Pack 1) that affect suspend, hibernation, and restarting. This issue…
What is “Serial Tunneling”?
Serial tunneling works by pairing two Sealevel Ethernet Serial Servers (located on the same subnet) together by configuring each other’s IP addresses. When one serial…
Why do I need optical isolation?
Optical isolation improves the reliability of I/O applications in industrial, marine, mobile or similar environments, thus alleviating the problems caused by ground loops, electromagnetic interference…
Can I change the COM number assignment for my Sealevel serial card?
There are only a few cases where you would want to change a COM number assignment. Your application only works at COM1 through COM4 and…
What are some common concerns when installing serial cables?
Make sure connections are clean and secure and thumbscrews are tightened If running long distances, choose a low capacitance cable Avoid running communication cables near…
How does the Sealevel SeaCOM serial driver differ from the Microsoft serial driver?
The SeaCOM serial driver looks exactly like the Windows driver to your application. SeaCOM uses the same API and calls as the Microsoft driver. However,…
Why do I need to connect a ground line when using RS-422 or RS-485 communications?
By connecting the ground wire, you avoid potential communication problems. Differential serial communications such as RS-422 and RS-485 use the ground as a reference.…