OVERVIEW OF ETHERNET

Here are the benefits gained by using Serial Servers:

1. Improved Access – Connect to serial devices over far greater distances.
2. Cost Effective - Communicate with serial devices without changing existing software.
3. Seamless Communications - Connectivity between serial devices over Ethernet is transparent to both the devices and the software.
4. Utilize Existing Equipment – Ethernet enable COM Ports.
5. Preserve Functional Legacy Networks - Connect serial networks as one or more subnetworks of the LAN.
6. Conserve Manpower - Remotely access serial devices.
7. Save Time - Update serial device software faster and easier using the Ethernet.

Serial to Ethernet: What To Look For

Not all means of bridging the Serial-to-Ethernet gap are equal. Here are a few things to look for and to consider:

* Hardware options – number of serial ports, desktop, panel and DIN-mount options.
* Support for RS-232, RS-422 and RS-485.
* “Tunneling” so the Ethernet is invisible to serial devices.
* Operating modes – virtual COM port, TCP/IP and UDP/IP.
* Multiple TCP client connections.
* Access to Serial Server menu settings, plus Telnet and Console modes to configure the server, allow remote upgrades, system defaults restoration, and select serial port settings.
* A web server for management from any web browser.
* Options for any PC on the network to correct problems.
* Software which allows easy access to the Serial Server for configuration, upgrades and analysis of firmware, port and hardware status.
* Ability to automatically reconnect the TCP link when it is lost.
* IP30 rated enclosure in industrial environments.
* Slim profile, DIN rail or panel mount options.
* Wide operating temperature range.
* Virtual COM support for the PC
* Modbus TCP/IP Capability

Application examples

There is no apparent limit to Serial Server applications, but some are more common. Usual configurations include camera and light controls, building security, traffic management systems, retail and point of sale devices.

Industrial devices such as PLCs, drives, motor controls and process analyzers are regular targets. Accessing serial devices through landline, cellular and satellite communications is also possible.

In short, serial servers present virtually unlimited options and possibilities and free up industrial environments to expand, modernize, and restructure with ease.