Measurement CIO-DAS16M116 User Manual
CIO-DAS16/M1/16
High Speed Analog Inputs
& Digital I/O
User’s Guide
Revision 4
November, 2000
LIFETIME WARRANTY
Every hardware product manufactured by Measurement Computing Corp. is warranted against defects in
materials or workmanship for the life of the product, to the original purchaser. Any products found to be
defective will be repaired or replaced promptly.
LIFETIME HARSH ENVIRONMENT WARRANTY
TM
Any Measurement Computing Corp. product which is damaged due to misuse may be replaced for only
50% of the current price. I/O boards face some harsh environments, some harsher than the boards are
designed to withstand. When that happens, just return the board with an order for its replacement at only
50% of the list price. Measurement Computing Corp. does not need to profit from your misfortune. By the
way, we will honor this warranty for any other manufacture’s board that we have a replacement for!
30 DAY MONEY-BACK GUARANTEE
Any Measurement Computing Corp. product may be returned within 30 days of purchase for a full refund of
the price paid for the product being returned. If you are not satisfied, or chose the wrong product by
mistake, you do not have to keep it. Please call for a RMA number first. No credits or returns accepted
without a copy of the original invoice. Some software products are subject to a repackaging fee.
These warranties are in lieu of all other warranties, expressed or implied, including any implied warranty
of merchantability or fitness for a particular application. The remedies provided herein are the buyer’s
sole and exclusive remedies. Neither Measurement Computing Corp., nor its employees shall be liable for
any direct or indirect, special, incidental or consequential damage arising from the use of its products,
even if Measurement Computing Corp. has been notified in advance of the possibility of such damages.
MEGA-FIFO, the CIO prefix to data acquisition board model numbers, the PCM prefix to data acquisition
board model numbers, PCM-DAS08, PCM-D24C3, PCM-DAC02, PCM-COM422, PCM-COM485,
PCM-DMM, PCM-DAS16D/12, PCM-DAS16S/12, PCM-DAS16D/16, PCM-DAS16S/16,
PCI-DAS6402/16, Universal Library, InstaCal, Harsh Environment Warranty and Measurement Computing
Corp. are registered trademarks of Measurement Computing Corp.
IBM, PC, and PC/AT are trademarks of International Business Machines Corp. Windows is a trademark of
Microsoft Corp. All other trademarks are the property of their respective owners.
Information furnished by Measurement Computing Corp. is believed to be accurate and reliable. However,
no responsibility is assumed by Measurement Computing Corp. neither for its use; nor for any infringements
of patents or other rights of third parties, which may result from its use. No license is granted by implication
or otherwise under any patent or copyrights of Measurement Computing Corp.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form by any means, electronic, mechanical, by photocopying, recording or otherwise
without the prior written permission of Measurement Computing Corp.
Notice
Measurement Computing Corp. does not authorize any Measurement Computing Corp.
product for use in life support systems and/or devices without the written approval of the
President of Measurement Computing Corp. Life support devices/systems are devices or
systems which, a) are intended for surgical implantation into the body, or b) support or
sustain life and whose failure to perform can be reasonably expected to result in injury.
Measurement Computing Corp. products are not designed with the components required,
and are not subject to the testing required to ensure a level of reliability suitable for the
treatment and diagnosis of people.
© Copyright 2000, Measurement Computing Corp
HM CIO-DAS16_M1_16.lwp
Table of Contents
1 INTRODUCTION
2 INSTALLATION
3 SIGNAL CONNECTIONS
4 SOFTWARE
5 REGISTER MAP
6 CALIBRATION AND TEST
7 SPECIFICATIONS
................................................................
................................................................
..................................................................
................................................................
.............................................................
......................................................
.....................................................
1
1
12.1 SOFTWARE ...................................................................
12.2 HARDWARE ..................................................................
2
23.1 ANALOG CONNECTOR DIAGRAM ...............................................
33.2 ANALOG INPUTS ..............................................................
33.3 CONNECTING SIGNALS TO THE ANALOG INPUTS .................................
33.3.1 KEEP HIGH AND LOW WIRES TOGETHER .....................................
33.3.2 SHIELDING ...............................................................
33.3.3 GROUNDED SIGNAL SOURCE ...............................................
43.3.4 FLOATING SIGNALS .......................................................
43.3.5 AVOID GROUND LOOPS ....................................................
53.4 DIGITAL OUTPUTS & INPUTS ...................................................
63.5 DIGITAL I/O CONNECTOR ......................................................
63.6 DT-CONNECT .................................................................
8
84.1 CUSTOM SOFTWARE UTILIZING THE UNIVERSAL LIBRARY ......................
84.2 FULLY INTEGRATED SOFTWARE PACKAGES (e.g. SoftWIRE) .......................
84.3 DIRECT REGISTER LEVEL PROGRAMMING ......................................
9
95.1 DAS16/M1/16 REGISTER MAP ...................................................
95.2 A/D DATA WORD REGISTER ....................................................
105.3 CHANNEL MUX HI/LO LIMITS WORD REGISTER .................................
105.4 8-BIT DIGITAL I/O REGISTERS .................................................
115.5 STATUS REGISTER ...........................................................
115.6 INTERRUPT AND PACER CONTROL REGISTER ..................................
135.7 BURST LENGTH, EXTERNAL TRIGGER, CTR0/TRG0 ..............................
135.8 COUNTER, GAIN/RANGE CONTROL ............................................
145.9 8254 DATA AND CONTROL REGISTERS .........................................
155.10 82C55 DIGITAL I/O DATA AND CONTROL REGISTERS ...........................
16
17
This page is blank.
1 INTRODUCTION
CIO-DAS16/M1/16 sets the standard for high speed, 16-bit data acquisition boards for ISA bus compatible computers.
The board provides 8 fully differential input channels with a variety of software programmable input ranges. The
board will transfer a full 1 million samples per second to Measurement Computing’s MEGA-FIFO memory board, and
directly over the ISA bus when used in high speed (200 MHz+) Pentium™ computers.
The board supports a variety of trigger modes. Triggers may be edge based on falling/rising or high/low states. The
board also provides 32-bits of digital I/O (24-bits CMOS, 8-bits TTL).
The CIO-DAS16/M1/16 is fully supported by the Universal Library® package which supplies a language interface for
all Windows and DOS based programming languages. The board includes the helpful InstaCal® installation, test and
calibration software package. The CIO-DAS16/M1/16 is also supported by a wide variety of third party data
acquisition and analysis software packages such as SoftWIRE.
2 INSTALLATION
2.1 SOFTWARE
The board has only one set of switches to set before installing the board in your computer. By far the simplest way to
TM
configure your board is to use the InstaCal
program provided as part of your software package. InstaCalTM will
show you any available options and how to configure the switches to match your application requirements. It will
create a configuration file that your application software (and the Universal Library) will refer to so the software you
use will automatically know the exact configuration of the board.
TM
Please refer to the Software Installation Manual regarding the installation and operation of InstaCal
. The following
hard copy information is provided as a matter of completeness, and will allow you to set the hardware configuration of
TM
the board if you do not have immediate access to InstaCal
2.2 HARDWARE
BASE ADDRESS
Unless there is already a board in your system using address
300h, leave the switches as they are set at the factory.
In Figure 2-1 at right, the board is set at base address 300h.
and/or your computer.
9876
5
4
SW
A9
A8
A7
A6
A5
A4
HEX
200
100
80
40
20
10
BASE ADDRESS SWITCH
Figure 2-1. Base Address Switches
1
- Address 300H shown here.
3 SIGNAL CONNECTIONS
There are two connectors on the CIO-DAS16/M1/16. The 37-pin connector which extends through the mounting plate
and extends out the rear of the PC is primarily for analog signals, and is referred to as the analog connector. The
40-pin header connector at the rear of the board carries the 24 digital I/O and is referred to as the digital connector.
3.1 ANALOG CONNECTOR DIAGRAM
The analog connector is a 37-pin, D-type connector, accessible from the rear of the PC through the expansion
backplate (Figure 3-1). With the exception of the missing D/A signals, the signals available are identical to the
CIO-DAS16.
The connector accepts female 37-pin, D-type connectors, such as those on the C73FF-2, a 2-foot cable with
connectors. If frequent changes to signal connections or signal conditioning is required, please refer to the information
on the CIO-TERMINAL or CIO-MINI37 screw terminal boards.
EXT TRIG/GATE/DIG.IN 1
Figure 3-1. Analog Connector
2
3.2 ANALOG INPUTS
Connect analog inputs to the board as shown in the following sections. Pay close attention to cabling and grounding
of the shield. Failure to cable as shown
TIP: Measure the voltage between the ground signal at the signal source and the PC. Use a volt meter and place the
red probe on the PC ground and the black probe on the signal ground. If there is more than 10 Volts, do not connect
to this signal source because you will not be able to make a valid reading. If the voltage is over 20 Volts, DO NOT
connect to this signal because it will damage the board and possibly the computer.
will likely result in signal noise
CAUTION - PLEASE READ
.
3.3 CONNECTING SIGNALS TO THE ANALOG INPUTS
Signal wiring should be done with consideration for the high speed sampling involved. Even if your A/D pacing rate
is not high, the converter is always converting in under 1uS and the internal MUX switching is done at similarly high
speeds. Close attention must be paid to how analog signals are connected to the board.
The CIO-DAS16/M1/16 has eight differential analog input channels. Each channel has a signal high input and a
signal low input. The measurement made by the A/D is the voltage difference between the LOW and HIGH inputs.
Differential inputs have a common mode range (see application note). The CIO-DAS16/M1/16 may have as much as
+11V or -6V of common mode between LLGND and signal LOW.
3.3.1 KEEP HIGH AND LOW WIRES TOGETHER
Keep the signal wires for a channel together. As a minimum, use twisted pair. This will reduce EMI or RFI noise on
your input signal.
3.3.2 SHIELDING
To further protect the input signals from noise, a use shielded wire. Shielded twisted pair is readily available. The
shield should be connected as shown in the diagrams below otherwise ground loops and signals noise may result.
3
3.3.3 GROUNDED SIGNAL SOURCE
S
C
C
C
L
G
S
C
L
A grounded signal source is defined as having the signal low referenced to chassis ground. If an instrument has only
two poles, HI and LOW, it is probably referenced to chassis ground internally. It is easy to check with an Ohmmeter
between LOW and the power cord ground prong. If an instrument has three poles, a HI, LOW and GND then you can
strap LO to GND as shown in Figure 3-2, or use the connection for Floating Signal Source.
IO-DAS16/M1/16
Instrument
Shielded Cable
Signal High
ignal Low
Tie Low to GND
hannel # High
hannel # Low
ND
GROUNDED SIGNAL SOURCE - Suggested way to connect
signal and cable shield. Ground is completed through
power ground. Voltage between outlet grounds not to
exceed the common mode range.
LGND
Figure 3-2. Recommended Cabling Method
3.3.4 FLOATING SIGNALS
A floating signal source is defined as having the signal low with no reference to earth ground (PC Chassis ground or
LLGND). Examples are a battery, an isolated precision power supply or a sensor which is not earth grounded.
A reference between signal LOW and LLGND must be provided because the CIO-DAS16/M1/16 inputs are
differential. Failure to supply the reference resistor (10K) will result in unrepeatable readings (Figure 3-3).
hielded
CIO-DAS16/M1/16
able
Signal High
Signal Low
Channel # High
Channel # Low
10K
LGND
FLOATING SIGNAL SOURCE - Suggested way to connect signals
and cable shield. Connection is made to Earth ground through
power ground.
Figure 3-3. Recommended Method for Connecting Floating Signals
4
Loading...