Industrologic UT51

Single Board Computer

Reference Manual

version 8/4/16

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

(636) 723-4000

Trademark and Copyright Information

UT51 is a Trademark of Industrologic, Inc. 2016

This document is Copyright (c) 2000-2016 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) 2000-2016 by Industrologic, Inc.


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.


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.


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 U51

Single Board Computer

The Industrologic UT51 was designed to provide an extremely small, yet versatile and easy to use single board computer based on the Atmel AT89LP4052 microcontroller. With its USB interface to a desktop or laptop computer it can be used as a PC to digital I/O interface, or it can be programmed to be used as a simple standalone industrial controller.

The UT51 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.

picture of UT51
UT51 printed circuit board

picture of UT51 in optional enclosure
UT51 with optional enclosure, USB and IDC10 cables, and top lid removed

Summary of Features

Mechanical Specifications

Single-sided .062" FR-4 glass epoxy printed circuit board
P.C. Board assembly has holes available for mounting to enclosure or #4 standoffs
P.C. Board dimensions: 3.00 inches by 1.20 inches
Holes in board assembly match PacTec CN-RL series enclosure, 3.30 by 1.50 by 0.80 inches

mechanical drawing of UT51

Note: If the UT51 is mounted in the optional enclosure and a ribbon cable is installed in J1, the strain relief section of the cable is not used so that there is clearance for the lid.

Electrical Specifications

Power supply requirements:

Powered by USB port-
Voltage: 5 volts DC nominal at USB connector
Current: 16 mA for USB interface and microcontroller section only, no outputs sourcing current, no external loads
Microcontroller section: Approximately 3 volts
Microcontroller section power out available at terminal block: 40mA

Powered at terminal block-
Voltage: 2.4 to 5.5 volts DC regulated
Current: 8 mA at +5V with no outputs sourcing current

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

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

I/O Signals and Connectors

9 logic level signals are available on the UT51, which include the 8 bits of the microcontroller port P1, and a microcontroller interrupt signal at J2. Each of the 9 signals is "pulled up" to +V 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. For more information on the limitations of these signals, see the microcontroller chip data sheet.

The 8 port bits of P1 are available on both screw terminal blocks and on J1, a shrouded and keyed male 10 pin IDC connector, with an industry standard pinout that includes micrcontroller power and ground. The +V signal is the same power that is used by the microcontroller circuitry on the UT51 and can be used to power external devices within the current limits of the USB interface module.

Power Connections and I/O Interfacing Examples

The following diagrams show some of the more common ways that the UT51 might be connected to power for standalone operation and to external devices.

Note: If the UT51 is powered from the USB port, the microcontroller section will operating at approximately 3 volts and the microcontroller logic level signals may not be suitable for 5 volt logic I/O.

diagram of UT51 power supply connections

diagram of UT51 I/O connections

Schematic Diagram

schematic diagram of UT51

end of manual
log file