Overton Check-MATE User Manual

E

M B E D D E D

T

E S T

S

O LU T I O N S

CHECK-MATE

Multifunction DAQ Module

USER’S MANAUAL

Overton Instruments, Inc

5431 Auburn Blvd. #196

Sacramento, CA 95841

www.microATE.net

CHECK-MATE USER’S MANUAL

NOTICE The information contained in this document is subject to change

without notice. To the extent allowed by local law, Overton Instru­ments (OI), shall not be liable for errors contained herein or for
incidental or consequential damages in connection with the fur­nishing, performance, or use of this material. No part of this docu­ment may be photocopied, reproduced, or translated to another
language without the prior written consent of OI.

WARNING The instrument you have purchased and are about to use may

NOT be an ISOLATED product. This means that it may be sus­ceptible to common mode voltages that could cause damage to
the instrument. SUCH DAMAGE IS NOT COVERED BY THE
PRODUCT’S WARRANTY. Please read the following carefully
before deploying the product. Contact OI for all questions.

WARRANTY OI warrants that this instrument will be free from defects in materi-

als and workmanship under normal use and service for a period of
90 days from the date of shipment. OI obligations under this war­ranty shall not arise until the defective material is shipped freight
prepaid to OI. The only responsibility of OI under this warranty is
to repair or replace, at it’s discretion and on a free of charge ba­sis, the defective material. This warranty does not extend to prod­ucts that have been repaired or altered by persons other than OI
employees, or products that have been subjected to misuse, ne­glect, improper installation, or accident. OVERTON INSTRU­MENTS SHALL HAVE NO LIABILITY FOR INCIDENTAL OR
CONSEQUENTIAL DAMAGES OF ANY KIND ARISING OUT OF
THE SALE, INSTALLATION, OR USE OF ITS PRODUCTS.

SERVICE POLICY 1. All products returned to OI for service, regardless of warranty

status, must be on a freight-prepaid basis.

2. Unless other noted, OI will repair or replace any defective
product within 10 days of its receipt.

3. For in-warranty repairs, OI will return repaired items to buyer
freight prepaid. Out of warranty repairs will be returned with
freight prepaid and added to the service invoice.

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CHECK-MATE USER’S MANUAL

Table Of Contents

1.0 INTRODUCTION 4

1.1 Overview 4

1.2 Highlights 5

1.3 Specifications 6

2.0 DESCRIPTION 7

2.1 Hardware Details 7

2.2 Board Layout 8

2.3 I/O Connections 9

2.4 J6 Consolidated 10

3.0 OPERATION 11

3.1 Embedded Control 11

3.1.1 Embedded Configuration 12

3.1.2 Embedded Programming 13

3.1.3 Embedded Program Example 14

3.2 PC Control 15

3.2.1 PC Programming 15

3.2.1.1 HyperTerminal 16

3.2.1.2 Virtual Instrument Panel 17

3.2.1.3 PC Programming Example 18

APPENDIX A. SERIAL COMMAND SET 19

APPENDIX B. SCHEMATIC 21

APPENDIX C. MECHANICAL DIMENSIONS 22

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CHECK-MATE USER’S MANUAL

1.1 Overview

1. Introduction

The Check-MATE has all the primary features you expect in a general purpose
data acquisition board, but for a fraction of the cost. It offers 8 single or 4 differ­ential analog inputs with 12-bit resolution (and a sampling rate of 100ksps).
Each of the analog inputs can be programmed for unipolar or bipolar operation.
Likewise, the analog output uses a 12-bit DAC (and operates in unipolar or bi­polar modes). In addition, there are 8 digital input/output lines (which are inde­pendently programmable).

The Check-MATE is made available in two versions, a standard model or with a
USB option. The standard model is designed for embedded applications and
provides a simple Oi-BUS interface for control by a external microcontroller.
With the USB option, many test solutions can be quickly built by connecting the
Check-MATE to a PC laptop or desktop, and then running our GUI software.
No external power source is required, since power is supplied through the USB
interface. Any either case, easy access to the hardware is made available
through a convenient collection of screw terminal connectors.

.

CHECK

CHECK---- MATE BLOCK D I A G R A M

CHECKCHECK

MATE B L O C K D I A G R AM

MATE B L O C K D I A G R AMMATE B L O C K D I A G R AM

12-BIT A/D

CONVERTER

MUX

INPUT

ANALOG

INPUTS

8 SE / 4 DIFF

USB

INTERFACE

(OPTIONAL)

CONTROL

INTERFACE

EMBEDDED
INTERFACE

+5V

DC/DC

12-BIT D/A

CONVERTER

DIGITAL I/O

4

+15V

-15V

ANALOG
OUTPUT

DIGITAL I/O

8-BITS

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1.2 Highlights

BEN E F I TS APPL I C A TI O N S F E A T UR E S

CHECK-MATE USER’S MANUAL

• A flexible, low-cost alterna­tive to expensive PC-based
DAQ cards

• Supports a wide-array of
mix-signal test applications

• Great for embedded solu­tions - place inside mechani­cal test fixtures, instrument
boxes or rack-mount enclo­sures

• Burn-In

• Engineering

• Depot Repair

• Production Test

• QA/QC Quality Control

• OEM Test Instruments

• 8 SE /4 DIFF Analog Input

Channels, 12-bit Resolution,
100ksps sample rate

• 1-Channel, Digital-to-Analog
converter, 12-bit Resolution,
Unipolar/Bipolar modes

• 8 Digital Input/Output Bits,
Independently programmable

• USB or embedded control
interface

• Low Cost

• Compact size, a 2.5” x 2.5”

PCB, with four #4 mounting
holes in each corner (spacers
and hardware included)

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1.3 Specifications

CHECK-MATE USER’S MANUAL

Analog Inputs

Number of inputs 8 SE / 4 DIFF, programmable

Input Ranges 0-5V, 0-10V, ±5V, ±10V

Resolution / Sample
Rate

Nonlinearity ±1LSB, no missing codes

12-bit / 100ksps

Analog Output

Resolution 12-bit

Range 0-10V, ±10V

Current ±5mA max

Settling Time 4uS max to ±1/2 LSB

Relative Accuracy ±1 LSB

Digital I/O

Number of lines 8 bits, bidirectional

Logic Levels TTL, ±25mA (source/sink)

Input Control

Embedded Oi-Bus interface

USB Interface Optional USB module

General

Power Supply +5VDC±10%@3mA

Operating Temp 0-50ºC

Dimensions 2.5” x 2.5”

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2.1 Hardware Details

Access to Check-MATE hardware is made possible through a convenient set of
screw terminal connections (J2 - J5), and J6 (which consolidates all signals into a
single 40-pin header).

The analog inputs (or channels) can be programmed for any combination of sin­gle-ended or differential operation. The diagram below shows examples of vari­ous configurations. You will also note the polarity of connections related to differ­ential operation can be transposed as well. Each channel can be programmed
for anyone of 4 different range modes (i.e., 0-5V, ±5, 0-10V and ±10V). Keep in
mind, the circuit provides ±25V protection on each channel.

The single analog output channel can be programmed for either unipolar (0-10V),
or bipolar (±10V) operation.

The digital circuit includes 8 independent I/O bits. Each bit can be programmed
for either input or output. While in the input mode, a bit can be programmed to
provide a weak pull-up (~10K). Each bit provides a TTL logic level and can
source/sink 25mA.

External control of the Check-MATE can be provided by a embedded controller
(such as the Micro-MATE), or with a PC. Embedded control is supported by J1
(Oi-BUS interface), which is a 10-pin header that includes a 3-wire SPI-bus, chip
select logic, power and ground. In PC applications, connector J1 is replaced with
the USB--MATE. The USB-MATE contains a USB connector (for the PC), and
a dual set of 7-pin headers that mount to the Check-MATE. The USB-MATE is
designed to interpret a set of ASCII commands sent from the PC, and then per­form various Check-MATE functions. For more information on the Check-MATE
command set, go to Appendix A. To support embedded applications, a complete
driver for the Check-MATE is provided in TES-MATE (or Test Executive Suite).

After power is applied to the Check-MATE, the analog inputs are configured for
single-ended (0-5V range), the analog output is set to zero (range is 0-10V), and
the digital I/O circuit is cleared (all bits inputs).

CHECK-MATE USER’S MANUAL

2. I/O Description

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