Industrologic T51

Single Board Computer

Reference Manual

version 11/13/02

Industrologic, Inc.
3201 Highgate Lane
St. Charles, MO
63301
USA

Phone: (636) 723-4000
WWW: http://www.industrologic.com
Email: info@industrologic.com

Trademark and Copyright Information

T51 is a Trademark of Industrologic, Inc. 2000
This document is Copyright (c) 2000 by Industrologic, Inc.
All rights reserved.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying or scanning, for any purpose other than the personal use by the purchaser of this product. Industrologic, Inc. reserves the right to revise this document at any time without obligation to notify any person of such revision. Industrologic, Inc. assumes no responsibility for any errors that may appear in this document.

Warning/Disclaimer

Whereas effort has been made to make the information in this document as useful and accurate as possible, Industrologic, Inc. assumes no responsibility for the application, usefulness, or completeness, of the information contained herein. Under no circumstance will Industrologic, Inc. be responsible or liable for any damages or losses including indirect or consequential damages or losses arising from either the use of any information contained within this manual or the use of any products or services referenced within this manual.

Industrologic, Inc. reserves the right to change any product's features, specifications, documentation, warranties, fee schedules, and conditions at any time and without notice.

Industrologic products are provided as printed circuit board level assemblies. Some Industrologic products may include mechanical packaging assessories which are provide for the purchaser's convenience, and are not intended to be final assembly enclosures.

Industrologic products are provided with the understanding that the purchaser will determine fitness for any particular application as well as achieve compliance with any particular specifications or regulations as required or desired for that application.

Warranty

Industrologic, Inc. products are warranted to be free from defects in workmanship or material under normal use and service for a period of one year from date of purchase. Industrologic's warranty is to the original purchaser only, but is extended to you by the Distributor or OEM from whom you purchased the product.

Industrologic's obligation under this Warranty is limited to replacement with a new or repaired unit to the original purchaser. The unit must be returned, and replacements obtained from Industrologic, Inc. or the Distributor or OEM from whom it was purchased.

This warranty will not apply if, in the judgment of Industrologic, Inc., damage or failure of the product has resulted from accident, alteration, misuse, abuse, connection to or operation with incompatible signals or power sources, or improper installation.

Under no circumstances shall Industrologic, Inc. be liable to purchaser or any third party for any loss of profits or other direct or indirect costs, expenses, losses, or consequential damages arising out of or as a result of any defects in or failure of Industrologic products or any part or parts thereof.

THIS WARRANTY IS IN LIEU OF ANY OTHER WARRANTY, EITHER EXPRESSED OR IMPLIED, AS TO DESCRIPTION, QUALITY, MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE OR USE, OR ANY OTHER MATTER.

Return and Repair Policy

Products purchased in single piece quantities may be returned, if in resellable condition, for a full refund of the purchase price only, to the original purchaser, within 30 days of purchase.

Products must be returned by original purchaser with a Return Materials Authorization (RMA) number issued by Industrologic, Inc. or the Distributor or OEM from whom it was purchased, authorizing its return. Current repair or replacement fees and procedures will be related during the issue of the RMA number.

Warranty or repair units must be returned with postage and insurance paid by purchaser. Industrologic, Inc. is not responsible for damages or loss during shipment.

Industrologic T51

Single Board Computer

The Industrologic T51 was designed to provide an extremely small, yet versatile and easy to use single board computer based on the Atmel AT89C2051 microcontroller. It includes all of the necessary circuitry for use as not only as a simple industrial controller, but as a convenient microcontroller development and educational tool as well.

The T51 includes the simple programming language Tiny Machine Basic already programmed into the microcontroller, or it can be reprogrammed using any number of software development tools available for similar Atmel microcontrollers.

Summary of Features

Based on the Atmel AT89C2051 microcontroller operating at 11.0592 MHZ
512 byte EEPROM for storage of small programs or configuration information
DB9F serial port connector with true RS-232 drivers for easy connection to PC compatibles
Pin-type power connector for easy connection to wall block power supplies
9 logic level signals plus power signals available on a 12 pin .1" header connector
On-board power supply, 5 volt regulator, and +5 volt output for external devices
Wide power supply range that includes use with mobile and battery operated equipment
Optional model with screw terminal block connections (T51-TB) in addition to header
Includes all items needed for immediate use: Power supply, RS-232 cable, software.
Includes Tiny Machine Basic programming language pre-installed in microcontroller

Mechanical Specifications

Single-sided .062" FR-4 glass epoxy printed circuit board.
P.C. Board assembly has holes available for mounting to enclosure or #6 standoffs.
P.C. Board dimensions: T51, 2.00 inches by 2.25 inches, T51-TB, 2.00 inches by 3.00 inches

P.C. Board Dimensions:

Electrical Specifications

Power supply requirements:
Power supply voltage: 7 to 18 volts AC, 8 to 18 volts DC, regulated or unregulated
Power supply current: 13 ma at 16VDC
Power supply connector: 5.5 mm outside diameter, 2.1 mm inside diameter

Operating environment:
Temperature: 0-50 degrees Celsius (32-122 Fahrenheit)
Humidity: 30 to 80 percent, non-condensing

Logic level I/O signals:
Source current: .5 ma
Sink current: 20ma each pin, 80ma total steady state

Serial Port Pinout

The T51 serial port connector and its pin out matches the 9-pin serial port of IBM PC compatible computers and can be easily connected to these computers using a pin-to-pin male-to-female cable. The T51 does not require hardware handshake signals and can be used with only the transmit, receive, and ground signals connected. However, some programs that run on a PC require that some of the input handshake signals be asserted going into the PC. In order to make this easier, the T51 has the common PC handshake signals looped back on the board, so that when a 9-wire cable is used, the signals are asserted without further connection.

To facilitate the connection of devices requiring power to the T51, the +5 volt signal from the on-board regulator has been connected to pin 9 of the serial connector. This connection will not affect normal serial ports since +5 volts is within the range of allowable voltages on RS-232 input pins.

The following is a pin out of the serial port signals:

T51 signal    -    TX   RX   -    GND  -    -    -    +5 OUT
pin           1    2    3    4    5    6    7    8    9
PC signal     DCD  RX   TX   DTR  GND  DSR  RTS  CTS  RI

I/O Connector Pinout

9 logic level signals are available on the IO connector of the T51, which are all 8 bits of the microcontroller port P1, and port P3 bit 7. Each of the 9 signals is "pulled up" to +5 volts with a 10K resistor for easy interfacing to switches or contact closures that connect the signal to ground.

The limitations of the logic level signals are basically the same as those of the microcontroller chip installed. They can "sink" 20 milliamperes each with a total current of 80 milliamperes (steady state) for all signals. The addition of the 10K pullup resistors allows the signals to "source" .5 milliamperes each. For more information on the limitations of these signals, see the microcontroller chip data sheet.

The logic level signals are brought out on a 12-pin 0.1" single-row header along with the power input, ground, and +5 out. The T51-TB also brings all 12 of these connections out to screw terminal blocks for easy connections.

The +5 out signal is the same power that is used by the circuitry on the T51 and can be used to power external devices, however, the current drawn from this signal should be limited to around 100 milliamperes.

Do not attempt to power the T51 with 5 volts at the +5 out. Apply power only to the voltage input signal (+V).

The following is a pin out of the I/O connector signals.

V    voltage input (+V or power input)
G    ground
5    +5 out (for external devices, current limited)
7    P1.7 (P1 bit 7)
6    P1.6 (P1 bit 6)
5    P1.5 (P1 bit 5)
4    P1.4 (P1 bit 4)
3    P1.3 (P1 bit 3)
2    P1.2 (P1 bit 2)
1    P1.1 (P1 bit 1)
0    P1.0 (P1 bit 0)
7    P3.7 (P3 bit 7)

I/O Interfacing Examples

The following diagrams show some of the more common ways that the T51 might be connected to external devices and power. The T51-TB with its screw terminal block connections makes some of these connections extremely fast and easy.

Schematic Diagram

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