ETHERNET I/O BOARD

Assembled EIO Picture


Remote Control & Sensing via Ethernet.

The Internet has revolutionized the way we communicate. From sending e-mails that arrive at the recipient's inbox almost immediately, to the plethora of information instantly available on the web, the world has become a much smaller place. That same network of connectivity can also be used to provide real-time remote control and monitoring from within any two Internet accessible points in the world. The Ethernet I/O board allows networking hobbyists to remotely control 4 relay activated devices and monitor the status of 4 optocoupled inputs via the Internet using a Web Browser or the Custom EIO Control Panel Software.



Due to ongoing demand I now have more EIO Boards in stock.
E-mail me for availability:
Email Me

Bare PC Board US$20 + postage.

Sorry, no kits or built units at this time.

 

Applications include: (remotely)
Controlling devices in your home.
Switching audio and video signals.
Keying a transmitter.
Resetting a "hung" computer.
Arming/ Monitoring an alarm system.
Enabling/disabling and monitoring a radio link or repeater site.


Features:
- 4 Normally Open Relay contacts.
- 4 Optoisolated inputs accept active signal level of 3 to 15VDC.
- LED indicators for Power, Input/ Output status and Network status.
- Very low power consumption, can be left on 24/7.
- Second set of contacts (N.O or N.C.) available from each relay at 3 pcb pads.
- Data protocol available for those wishing to write their own custom client applications.

These additional features are available when using the custom EIO Control Panel software:
- ON/OFF or momentary operation of the relays (latter good for "reset" functions).
- User defined audio WAV file alarm can be enabled when Input #1 is activated.
- User defined labels for Relays and Opto-Inputs.
- Selectable refresh update polling.



The Ethernet I/O board also doubles as a great learning or general purpose platform for the Atmel ATmega series of microcontrollers.

Hardware features:
- 40 pin DIP ATmega microcontroller.
- Realtek RTL8019AS ethernet interface with RJ45 jack and integral magnetics.
- Standardized 10 pin In-Circuit-Serial-Programming (ICSP) header.
- 1 RS-232 serial port.
- 4 N.O. Relay contacts from latched outputs on Port A.
- 4 Optically isolated Inputs on Port C.
- Access to 8 latched output bits on Port A and 8 Input/Output bits on Port C.
- I2C port (alternate function of Port C).
- JTAG interface option (alternate function of Port C).
- 32K x 8 of external EEPROM using a 24LC256 on the I2C bus.
- System reset via an onboard pushbutton switch or offboard via external reset pads.
- 7.37 MHz system clock.
- Access to all 9 pins on serial DB-9 connector.
- Strappable serial RXD & TXD pins (2&3) for null modem operation.
- All DIP Integrated circuits socketed.
- Polarity protected D.C. power input.


Board Specifications:
General:
Physical Dimensions: 5" (L) x 3.5" (W) x 0.75" (H)
Power Jack: 2.1mm centre positive coaxial type
Ethernet Jack: Standard Ethernet Cat-5 RJ-45
Serial Jack: Standard DB-9 female
Input/Output Screw Terminals: Up to 14AWG wire at 5mm spacing
Mounting: 4 x 4-40 size corner mounted holes

Electrical:
Power Requirement: 12VDC @ <200mA (w/ all relays activated)
Optocoupled Inputs: 3VDC (min) to 15VDC (max)
Relay Contacts: 1A switching, 2A carrying current @ 250 VAC (w/ NEC EA2-12 relays)
Serial I/O: RS-232 Levels
Ethernet: 10mbps on CAT-5 cable


Requirements:
- Moderate knowledge of networking principals and ability to determine your WAN Internet I/P.
- 12VDC @ 0.3A power supply.
- PC to program an available LAN I/P address (192.168.xxx.xxx) into the board (one-time set-up).
- PC running Windows(tm) 98/2000/XP operating system for Client software operation.
- Internet connection with Ethernet I/O board residing behind a router.




Interested in learning how the EIO board works ?
Click here to check out a well written tutorial by Ben Zijlstra on using the Atmega/ RTL8019as under Bascom.





"Fine Print"
The Ethernet I/O board is offered as a kit and is intended for educational, hobby and other non-critical use. There are many technical variables between the Client (remote computer) and server (EIO Board). Although testing has proven the Ethernet I/O board to be very reliable, no claims can be made to the integrity of communications between the client PC and Ethernet I/O board or operation of any devices connected to the board. I will endeavor to provide as much technical assistance as I can however it is impossible for me to resolve every conceivable networking issue from afar. The purchaser/user should be knowledgeable in networking principals and is ultimately responsible for all applications of the Ethernet I/O board. The Ethernet I/O board does not have an IEEE assigned MAC number so it must reside behind a router or other network device which does, in order to operate on the Internet. The Ethernet I/O board is not U/L or CSA approved.


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