Index >> Products >> IP Serial

HWg-ER02a: 230V Relays & RS-232 over Telnet

Warning: Product was replaced by IP Relay HWg-ER02b

The IP Relay ER02a is a RS-232 / RS-485 serial line converter with two 230V-rated SPDT relays. The contacts and the serial line can be controlled using the free HW VSP (virtual serial port) software, or using the documented M2M protocol. The communication protocol is based on Telnet and RFC2217 extensions.
HWg SDK gives examples, in several programming languages, of using IP Relay in your software and applications.

IP Relay applications

  • IP Relay used as an Ethernet/RS-485 converter, optionally switching power on and off.
    • Access control systems
    • Barcode readers
    • Electronic scales
    • RFID interfaces
    • Fingerprint scanners
  • Remote monitoring of Ethernet devices over a serial console, Ethernet-commanded RESET if needed. Remote reset can take place by shorting an internal reset button, or by disconnecting 110/230V power supply. Contacts of IP Relay ER02a are certified for switching mains power.
  • Commonly used to connect an IP video camera and restart it remotely when needed.


Note:
The relay is controlled with Ethernet commands. It is not an autonomous device. If you need a unit that will autonomously monitor other devices, use the IP WatchDog, which monitors up to 2 servers using a serial connection, ICMP PING, or WWW access.

 
contact relay, normally open, normally closed, terminal server, ethernet i/o relay, IP Relay, remote output, web based relay

 

Basic features

  • Ethernet Network - RJ45 (10BASE-T - IEEE 802.3)
  • 2 relay outputs for 110/ 240V / 16A
  • RS-232 serial port (RxD, TxD, CTS, RTS)
  • Virtual serial port for Windows 2000/XP/Vista/Windows 2000 Server/Windows 2003 Server available on CD
  • Two independent, Ethernet controlled relay up to 240V/16A
     
  • Secure access with a predefined IP address range and a 128-bit TEA encryption
     
  • Simple and well-documented M2M (Machine to Machine) communication protocol, many examples of communication for various programming languages - MS Visual Basic, Delphi, Borland C++, JAVA, PHP a and others.. Product is fully supported by HWg SDK.
  • Simple and quick installation
  

Typical applications

Usage examples

  • Remote monitoring of  IP camera system's failure
  • Remote control of the network configuration
  • Remote control and restarting of micowawe connections.
  • Remote devices control (ventilation, door opening..)
 

One built-in serial port can be used for remote access using RS-232 console, but it also can be used as a virtual serial port (for example "COM 8") using the HW Virtual Serial Port driver.

You can order the IP Relay in the DIN molding version, or a modification with 8 inputs and 8 outputs (the I/O Controller). If you are not sure wheather the IP Relay can be used in your application, please contact us...

 

Download & Datasheets

Flyer Datasheet

Application note

  • AN21 – Controlling of IP Relay using program NetCat
    IP Relay contains except RS-232 serial port also another two relay, which switching on/off can be controlled over Ethernet (TCP/IP). This application note describe how to control ethernet i/o relays from the Windows command line sending right sequence using program NetCat.
 
 

M2M (Machine to Machine) Communication protocol

remote control, normally open, normally closed, terminal server, ethernet i/o relay, IP Relay, web based relayThe built-in relays are controled using NVT commands. This is a 7-byte sequence, which is sent to the opened TCP/IP connection and if accepted, it is confirmed with a similar 7-byte sequence sent back. This TCP connection is similar to the TP connection to the RS-232 port, but when using the NVT (which is a standard TELNET) the data from serial port are not interrupted when sending the commands. You can read more about NVT and our RFC2217 compatible extension on the Network Virtual Terminal page. Detailed list of relay's controling commands you can find in product manual.

Useful SW

  • Hercules Utility
    normally open, normally closed, terminal server, ethernet i/o relay, IP Relay, web based relayThis utility will help you testing a setting up the device. .
       
    • RS-232 terminal
    • TCP/IP Client terminal
    • TCP/IP Server terminal
    • UDP terminal
    • UDP Config
    • Test mode (TCP/IP NVT commands + TEA)

    This utility is completely free to use and distribute..
    Hercules Setup Utility            

      
  • HW Virtual Serial Port
    remote control, relay switch, normally open, normally closed, terminal serverVirtual serial port driver for windows is a software tool for adding a virtual COM port to your windows system. All the data from this port is then redirected to another HW interface.

    You can control the relays using the "Binary I/O" tab.
    • Unlimited, free Virtual Serial Port for any TCP/IP device.
    • Designed for Windows 2000, XP Vista, 200 server, 2003 server.
    • If the device supports RFC 2217 (NVT), you can setup all the serial port parameters (speed, parity, stop bits).
    • The driver works as a "TCP client", but it can be also used in "TCP server" mode.
    • Logging all the communication into a file, to make debugging easier.
    • You can create more virtual serial ports on one system using command line parameters
    • The software can be run o a windows startup and hidden to the system tray.


  • remote control, normally open, normally closed, web based relayBorland C++ communication example
    A simple TCP/IP device communication example, written in Borland C++ Builder 6.00. It demonstrates a simple Client terminal with basic NVT (Network Virtual Terminal) commands = Are You There and I/O functions extension.

  • remote control, normally open, normally closed, door openingDelphi Charon 1 - NVT communication example
    A simple TCP/IP device communication example, written in Borland Delphi 5. It demonstrates a simple Client terminal with basic NVT (Network Virtual Terminal) commands = Are You There and I/O functions extension.

  • MS Visual Basic example
    Simple routines for NVT commands and a TCP/IP device over Winsock in MS Visual Basic 5.0. Simple I/O commands are implemented, but without TEA.
  • remote control, normally open, normally closed, web based relayJava NVT simple Code Example
    A very simple I/O pins control written in JAVA. The application is not password protected, so you can modify it as you wish.
  • remote control, normally open, normally closed, door openingPHP - working with the I/O Controller
    A simple remote I/O pins control. User requests a www page from the server, which opens a connection to the predefined IP and port, reads and displays the values on the final www page.

FAQ & Support

Ask for the price or details:
NAME:* 
Company: 
 - Web:  http://
Email:* 
Newsletter:
Phone: 
Country: *


Spam protection. How many is SIX times six?

Q: Can the relays be controlled using a WWW page?
A: No, this IP relay version supports only M2M (Machine to Machine) protocol (NVT + RFC2217). If need a version that can be controlled using a WWW page, please use IP WatchDog.

Q: Can the IP Relay be mounted on the DIN moulding?
A: Yes.

Q: Is it possibl to switch 110/230V with internal relaye contacts?
A: Yes, IP Relay HWg-ER02a can be used to switch 110/230V do 16A AC. There is CE certificate approval for this.

Q: Do you plan to publish any other software examples?
A:  Yes, you can find many software examples for Borland C++ a Delphi (also Visual Basic, JAVA and PHP) on the Support & Download page. There are more to come.
Product is fully supported by HWg SDK.

.


Ordering

We always keep several units in stock. We ship worldwide, using FedEx or other carriers. Request a quote

IP Relay HWg-ER02a SET [600 334]

remote control, terminal server, ethernet i/o relay, door openingIP Relay HWg-ER02a SET is ready for immediate use. The set contain except the device also device manual, CD and necessary connecting cables. 

  • IP Relay HWG-ER02a [600 334]
  • LapLink cable [600 063]
    Serial communication cable (2x DB9F) for setting up the device over RS-232 
  • Power adaptor European version [600 080]
    (possible USA version [600 081] or UK version [600 082])
  • Printed manual
  • CD with all the necessary software in the /IP-relay/ directory
    • Virtual Serial Port for Windows 2000 / XP / Vista / 2000 server / 2003 server on the CD, or the latest version on the Internet.


Note:
If you need other than European adaptor, please mark it into OrderForm and we will send you USA or UK version instead of the European one.


Ordering variants

We can supply a PortStore2 PL starter set, or just the unit – as specified by the ordering ID number, OID. Please call for the lead time of uncommon types, or request lead time confirmation in your order.

Order # Product name Version of device
600 334 IP Relay HWg-ER02a Device only (photo)
600 340 IP Relay HWg-ER02a SET Easy to start set (photo)
Set include power adaptor, printed manual, CD with software etc.

Optionally accessories & related products

Keywords

IP Relay

Related WEB page & products

  • AN21 – Controlling of IP Relay using program NetCat
    This application note describe how to control ethernet i/o relays from the Windows command line sending right sequence using program NetCat.
  • PortBox
    Conversion of a serial line to Ethernet and vice versa (Server or Client/Server mode) with RS-485 support and protocol enhancements. Data is transmitted over the Ethernet using the TCP/IP or UDP/IP protocols.  
  • HW Virtual Serial Port
    Free Virtual Serial Port driver for Windows is a software tool, which adds a virtual Comm port to the system, for instance COM5, and all the data from this port is re-directed to another TCP/IP device on the Ethernet network.  
  • Ethernet I/O Controller
    Conversion of a serial line to Ethernet and vice versa (Server or Client/Server mode) with RS-485 support and protocol enhancements. Data is transmitted over the Ethernet using the TCP/IP or UDP/IP protocols.  
  • Charon I module
    Embedded serial line to ethernet converter module, you can connect measuring devices, SNMP interface, thermometers etc...
  • IP WatchDog
    Remote monitoring Ethernet and serial (R-S232, RS-485) devices provided by tracking the serial communication, ICMP ping function or requesting the WWW page. By the means of these functions it can RESET up to two monitored devices, such as servers, routers, access and security systems.