Web Control Board - Technical

Microcontroller

• Microcontroller: AT89C51RD2
• Main Crystal: 18.432MHz
• Speed: 18.432MHz
• Processor Language: 8051

Memory

• Program Flash Memory (Internal): 64kBytes
• RAM Memory (Internal): 256 Bytes
• EEPROM Memory (Internal): None
• EEPROM Memory (External): 64kBytes (4x24C515 Optional)

Input/Output

• I/O Points Available: 16
• I/O Points Connection: IDCC Connector and Polarized Header

Clocks/Timers

• Real Time Clock: Yes (DS1307 Optional with Back-Up Battery)
• Real Time Clock Crystal: 32.768kHz
• Battery Back-Up: Yes - 1.5V Watch Battery (Optional)

LAN/Internet Communication

• Interface Control IC: RTL8019AS
• Crystal: 20.000MHz
• Isolation Transformer: Yes

Other Communication

• RS232 Communication: Yes
• RS485 Communication: Yes - (75176 Optional)
• RS488 Communication: Yes - (75176x2 Optional)

Ancillary Features

• In-Circuit Programming: Yes
• Power-On Led: Yes - Red
• Link Led: Yes - Red
• Receive(Rx) Led: Yes - Green
• Transmit(Tx) Led: Yes - Yellow
• Reset Button: Yes
• PSEN Button: Yes
• Interrupt Button (INT0): Yes

Power Supply

• Power-Supply: 9 - 12 Vdc

Dimensions

• LxWxH: LxWxH: 155mm x 90mm x 42mm

Parts Supplied

• Included Parts: Web Control Board, Network Cable, RS232 Cable, Download Software, Manual on CD, Examples and Sample Code, Datasheets on CD.

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