Engineers often find themselves in a situation where there is not enough cable length for connecting end devices with RS-232, RS-422 and RS-485 interfaces to a computer or a controller. How to solve this problem? There are several options for extending RS-232, RS-422 and RS-485 interfaces!
Before we begin, let’s recall the maximum distance that data can be transmitted depending on the interface.
The easiest way to extend the RS-232 interface is to use an RS-232 to RS-485 converter or an interface converter, which increases the distance from up to 15 meters all the way to up to 1200 meters. Think of I-7520 and TCC-100.
Although RS-422 and RS-485 interfaces are very similar, the RS-485 interface is much more common, we will use RS-485 as our example.
If you are a few hundred meters short, there’s still a way to extend the RS-485 interface. For example, use a serial interface repeater or a hub.
And what if you want to extend the RS-485 network for 2 kilometers and beyond?
To do this, we convert the serial interface to into fiber via the optic converter.
What if extension through fiber optics is too much effort, but you have a local Ethernet or Internet network?
You can use serial interfaces servers or converters from RS-232, RS-422 and RS-485 interfaces to Ethernet.
It is possible to connect the RS-485 interface to a Wi-Fi network.
RS-232/422/485 wireless device servers NPort IAW5000 and NPort W2000 series will come to your aid.
If the Ethernet/Internet is not an option, consider the radio channel solution.
SST-900B by ICP DAS is the right tool for this job.
If the devices you are connecting are scattered across a vast and difficult terrain, you could use GSM or 3G cellular connection.
If you have any questions, please send an email at email@example.com.
16xRS-232 230.4Kbps Industrial Device Server for 10/100Mb Ethernet
16-Port RS-232 Async Server, Single 10/100Mbps Ethernet, +/-48VDC Powe
8xRS-232 230.4Kbps Industrial Device Server for 10/100Mb Ethernet