Industrologic DR51

Single Board Computer

Reference Manual

version 7/25/07



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

DR51 is a Trademark of Industrologic, Inc. 2003

This document is Copyright (c) 2003 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.

The software distributed with and the firmware contained in this product is Copyright (c) 2003 by Industrologic, Inc.


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 DR51

Single Board Computer

The Industrologic DR51 is an Atmel AT89C4051 microcontroller based single board computer designed to provide a digital I/O and relay package that can be used as a programmable industrial controller or as an RS-232 slave device.

The DR51 includes, pre-programmed into the microcontroller, a special version of Industrologic's simple programming language Tiny Machine Basic, (written for the hardware on the DR51 and including keypad instructions), and the microcontroller chip can be re-programmed using any number of software development tools available for similar Atmel microcontrollers.



picture of DR51


Summary of Features



Electrical Specifications

Power supply requirements-
Power supply voltage: 10 to 12 volts AC, 11 to 14 volts DC, regulated or unregulated
Power supply current: 30mA at 12VDC with no relays or programmable LED activated
(not including any external loads on the +5 supply)
Relay current: approximately 60mA per relay/relay LED indicator
Programmable LED current: approximately 20 mA
Power supply connector: 5.5 mm outside diameter, 2.1 mm inside diameter

External power:
Power used from the +5 screw terminal or from pin 9 of the DB9 connector should not exceed 100mA.

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

Logic level I/O signals (D1-D8)-
(10K pull-up resistor to +5)
Source current: .5 mA
Sink current: 20mA maximum each pin, 80mA maximum for all pins

Form "C" Relay Contacts-
Maximum voltage: 30 volts, AC or DC
Maximum current: 10 amps
Manufacturer's type: Omron G5LE-14 series or equivalent



Mechanical Specifications

.062" FR-4 glass epoxy printed circuit board, 2.75 inches by 4.25 inches
P.C. Board assembly has holes available for mounting to enclosure or #6 standoffs
P.C. Board assembly holes match Bud Industries CU-389 or CU-389MB


DR51 dimensions and connections



DR51 Serial Port

The DR51 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 DR51 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 DR51 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 DR51, 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: 

DR51 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

diagram of DR51 serial connector


Digital I/O Signals

Eight digital logic level I/O signals are available at screw terminal block connectors of the DR51, which are all pins on the microcontroller. Each of the 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. To facilitate the connection of devices requiring power, the screw terminal block connectors also include ground, and +5 from the on-board regulator.

The limitations of the digital logic level signals are 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" 0.5 milliamperes each. For more information on the limitations of these signals, see the microcontroller data sheet.



Keypad/Digital I/O Connector

The DR51 includes a 12 pin .1" header connector that includes the connections for J1, plus ground and the unregulated voltage (+V). J1 is connected to the eight digital I/O signals, to +5, and to circuitry that allows a pin to sink current through a current limiting resistor whenever the programmable LED is activated. This connection allows J1 to be used in several different ways:

The current limiting resistor R9 is normally 150 ohms to provide approximately 18 mA to an external LED connected to J1, but can be changed by the user to provide other current values.

Note: It is the user's responsibility to insure that any backlighting power connections to keypad modules are correct and that current limitations are appropriate..



Connectors J1 and J2 Pinouts

J1                            Signal

1                             unregulated (+V)
2                             ground
3      1                      +5
4      2        1             Digital I/O #8
5      3        2             Digital I/O #7
6      4        3             Digital I/O #6
7      5        4             Digital I/O #5
8      6        5             Digital I/O #4
9      7        6             Digital I/O #3
10     8        7             Digital I/O #2
11     9        8             Digital I/O #1
12     10                     programmable current sink



Digital I/O Circuitry

diagram of DR51 digital I/O circuitry



I/O Interfacing Examples

The following diagrams show some of the more common ways that the DR51 might be connected to external devices and power. The DR51 with its screw terminal block connections makes some of these connections extremely easy and fast.

diagram of DR51 LED and switch connections


diagram of DR51 keypad connections


diagram of DR51 power supply and relay connections




end of manual
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