HWg-ER88a: Serial, DI & DO over IP
I/O Controller HWg-ER88a is a Ethernet terminal server (RS-232/485) with I/O. Supports Telnet and a remote serial port in Windows (HW VSP). Industrial model, fits on a DIN rail. It is controlled over TCP/IP using a Telnet-like M2M protocol.
Serial port, inputs and outputs are controlled over a TCP/IP connection using a TELNET-like (RFC2217) M2M protocol. The protocol is fully documented (NVT), the Hercules SW terminal can be used for testing (supports inputs and outputs).
- The ER88a serial port can be connected to via a virtual serial port (e.g. COM27) on your networked PC. The HW VSP application for Windows is supplied free of charge.
- Eight outputs can be controlled from the command line with a simple HWg IPRC cmd utility.
Control the product from your own application in minutes.
Make your work easier with many examples for various programming languages in the HWg SDK (Borland C++ Builder, MS Visual C, VB, Delphi, C#, PHP, JAVA).
Box-2-Box mode: Two devices can be connected against each other to extend inputs, outputs, and the serial line over the Ethernet.
- RS-232/485 serial port
- 8 binary inputs to connect contacts, buttons, or 7 to 24VDC
- 8 binary outputs (open collector)
- Virtual serial port driver for Windows = easily get e.g. COM17 on your PC
- Industrial model, fits on a DIN rail
- Ethernet interface for connecting to an IP network
- Telnet-like M2M protocol
- Support for TCP Server and TCP Client/Server modes
- Box-2-Box mode
- Link up to eight buttons / switches with a SW application.
- Connect your RS-232 devices to the network: barcode / RFID scanners, serial printers, displays.
- The outputs can, for example, open a door, turn on a horn, or disconnect power – remotely over the network.
- The Box-2-Box mode allows you to connect two units against each other, 1:1.
- Extension of RS-232 or RS-485 range over the network
- Inputs at one device control outputs at the other device, 1:1
- TCP/IP Server [Client -> Server]
I/O Controller, as a TCP server, listens for incoming TCP connections from a computer (a PC or a server). When the connection is established, data in the internal buffer are transmitted, and then bidirectional communication can take place, similarly to a common "terminal server".
Binary inputs and outputs can be controlled with a M2M protocol that uses an extension of RFC2217 (NVT support must be enabled).
- TCP/IP Client/Server [Server <- Client]
I/O Controller has received some data into its internal buffer from the serial port (or has detected a change at the binary inputs) and attempts to send it to the server. The unit tries to establish a connection to the specified outgoing IP address and port. If unsuccessful, it waits for about one second in the TCP server mode and then tries to establish the connection again.
Binary inputs and outputs can be controlled with a M2M protocol that uses an extension of RFC2217 (NVT support must be enabled and the TCP connection must be established).
Data are sent as UDP packets, without delivery acknowledgement.
In the UDP mode, the device uses a sophisticated "packetiser" that allows you to specify broad conditions about what should be sent from the serial line to the Ethernet, what should not, and when.
Binary inputs and outputs cannot be controlled in the UDP mode.
- VSP (Virtual serial port)
The HW VSP software, when installed on a PC with Windows, creates a virtual serial port (e.g. COM7), and the serial port at the I/O Controller then works as a physical port of your PC.
Binary inputs and outputs can be controlled from HW VSP using the "Binary I/O" tab, as long as NVT support is enabled for both the HW VSP software and the I/O Controller unit.
- Software for Users
- Hercules - configuration (IP address, Telnet setup) and testing utility for Windows
- HWg IPRC cmd – command-line control of outputs
- HW VSP - HW Virtual Serial Port for Windows.
I/O Controller is also supported by the VSP Multi version that allows you to connect up to 64 serial ports to a single PC.
- For programmers
- NVT (Network Virtual Terminal) M2M communication protocol
Ordering and FAQ
- How can I order a sample or ER88?
We either fulfill your order at HW group in Prague, or we pass it down to our distributor in your country.
(List of HW group distributors).
- Where can I find product pricing?
Ask our distributors, or request a quote (by e-mail or by filling out this form).
- What is the warranty?
The standard warranty for this product is 2 years, can be extended upon request.
- Can I pay by credit card?
Yes, HW group accepts payments by credit card or wire (bank) transfer. However, your card number needs to be manually written down into a form on the received invoice, which is then faxed back to us.
- How do you ship?
We work with several shipping companies, and we use FedEx for express deliveries.
- Is it possible to control the outputs and read the inputs over a WEB interface?
No, I/O Controller products do not have a built-in web server, all communication takes place over a TELNET-like protocol. If you need a Web interface, use our Poseidon or Damocles products.
- Where can I get another set of connectors for connecting the unit?
All necessary connectors are supplied. Replacement connectors can be ordered from us.
- Can I control the product from my own SW application? Where can I find a description of the protocol?
Yes, use the HWg-SDK examples or see the description in NVT documentation.
>> Online order form
|I/O Controller HWg-ER88a
|I/O Controller HWg-ER88a SET
|Telnet digital output, RS-485 to IP, Serial display over IP, DI Ethernet DO
Device server with IO, free virtual serial port, RS-232 display to Ethernet, remote relay output
Ethernet to RS-232/485 converter, supports Server and Client/Server mode, NVT, TEA authentication, RS-232 "tunneling" over TCP/IP or UDP/IP.
Terminal server with a 2 / 32 Mb buffer. Stored data are accessible over an Ethernet network using TCP/IP. Typical applications include replacing a RS-232 printer and making its data available over Ethernet.