Advantech PCI-1713 User manual

PCI-1713
32-channel Isolated
Analog Input Card
User's manual

Copyright
This documentation and the software included with this product are
copyrighted 1999 by Advantech Co., Ltd. All rights are reserved.
Advantech Co., Ltd. reserves the right to make improvements in the
products described in this manual at any time without notice.
No part of this manual may be reproduced, copied, translated or
transmitted in any form or by any means without the prior written
permission of Advantech Co., Ltd. Information provided in this
manual is intended to be accurate and reliable. However, Advantech
Co., Ltd. assumes no responsibility for its use, nor for any infringe-
ments of the rights of third parties which may result from its use.
Acknowledgments
PC-LabCard is a trademark ofAdvantech Co., Ltd. IBM and PC are
trademarks of International Business Machines Corporation. MS-DOS
and Windows are trademarks of Microsoft Corporation. Intel and
Pentium are trademarks of Intel Corporation.
CE notification
The PCI-1713, developed byADVANTECH CO., LTD., has passed the
CE test for environmental specifications when shielded cables are
used for external wiring. We recommend the use of shielded cables.
This kind of cable is available from Advantech. Please contact your
local supplier for ordering information.
On-line Technical Support
For technical support and service please visit out support website at
http://support.advantech.com
Part No. 2003171300 1st Edition
Printed in Taiwan March 1999

Contents
CHAPTER 1 General Information........................ 1
1.1 Introduction.......................................................... 2
1.2 Features................................................................ 3
1.3 Specifications ....................................................... 3
1.4 Block Diagram..................................................... 6
CHAPTER 2 Installation ........................................ 7
2.1 Initial Inspection ................................................... 8
2.2 Unpacking............................................................. 8
2.3 Installation Instructions ........................................ 9
CHAPTER 3 Signal Connections ........................ 11
3.1 Overview.............................................................. 12
3.2 I/O Connector ..................................................... 12
3.3 Analog Input Connections.................................. 14
3.4 Field Wiring Considerations .............................. 17
CHAPTER 4 Register Structure and Format.... 19
4.1 Overview.............................................................. 20
4.2 I/O Port Address Map......................................... 20
4.3 A/D Data............................................................. 23
4.4 Software A/D Trigger.......................................... 23
4.5 A/D Channel Range Setting............................... 23
4.6 MUX Control ...................................................... 25

4.7 Control Register .................................................. 27
4.8 Status Register .................................................... 28
4.9 Clear Interrupt and FIFO.................................. 29
4.10 Programmable Timer/Counter Registers ......... 29
CHAPTER 5 Calibration ...................................... 31
5.1 Introduction......................................................... 32
5.2 VR Assignment.................................................... 32
5.3 A/D Calibration .................................................. 33
APPENDIX A 82C54 Counter Chip Functions.. 35
A.1 Introduction......................................................... 36
A.2 Counter Read/Write and Control Registers ....... 36
A.3 Counter Operating Modes ................................. 39
A.4 Counter Operations ............................................ 41
APPENDIXB PCLD-881BWiringTerminalBoard ...... 43
B.1 Introduction ........................................................ 44
B.2 Features .............................................................. 44
B.3 Application ......................................................... 44
B.4 Board Layout...................................................... 45
B.5 Single-ended Connections.................................. 46
B.6 Differential Connections..................................... 47
B.7 Technical Diagram............................................. 48

Chapter 1 General Information 1
1
General Information
CHAPTER

2PCI-1713 User's Manual
1.1 Introduction
The PCI-1713 is a 12-bit 32-channel analog input card for the PCI
bus. It provides 32 analog input channels with a sampling rate up to
100k samples/s, 12-bit resolution and isolation protection of 2500
VDC.
PCI-bus Plug and Play
The PCI-1713 uses a PCI controller to interface the card with the PCI
bus. The controller fully implements the PCI bus specification Rev 2.1.
All bus relative configurations, such as base address and interrupt
assignment, are automatically controlled by software.
Flexible Input Types and Range Settings
The PCI-1713 features an automatic channel/gain scanning circuit.
The circuit, rather than your software, controls multiplexer switching
during sampling. The on-board SRAM stores different gain values
and configurations for each channel. This design lets you perform
multi-channel sampling with different gains for each channel and with
free combination of single-ended and differential inputs.
High-speed Data Acquisition
The PCI-1713 provides a sampling rate up to 100k samples/s. It has an
on-board FIFO buffer, which can store up to 4KA/D samples and
generates an interrupt signal when the FIFO is half full. This feature
provides continuous high-speed data transfer and more predictable
performance on Windows systems.
Supports S/W, Internal and External Pacer
Triggering
The PCI-1713 supports three kinds of trigger modes for A/D conver-
sion: software triggering, internal pacer triggering and external pacer
triggering. The software trigger allows users to acquire a sample when
it is needed; the internal pacer triggers continuous high-speed data
acquisition. The PCI-1713 also accepts external trigger sources,
allowing synchronous sampling with external devices.

Chapter 1 General Information 3
Satisfies the Need for Isolation Protection
The PCI-1713 provides optical isolation protection of 2500 VDC
between the inputs and the PC bus to protect the PC and peripherals
from damage due to high voltages on the input lines. It is ideal for the
situations where budget-conscious users require flexibility, stability
and a high level of isolation protection for their data acquisition
system.
1.2 Features
• 32 single-ended or 16 differential analog inputs, or a combina-
tion
• 12-bit A/D converter, with up to 100 kHz sampling rate
• Programmable gain for each input channel
• Automatic channel/gain scanning
• On-board 4K samples FIFO buffer
• Programmable pacer
1.3 Specifications
Analog Input:
•Channels: 32 single-ended or 16 differential (software programma-
ble)
•Resolution:12-bit
•On-boardFIFO:4Ksamples
•Conversiontime:2.5 µs
•Inputrange:
Bipolar: ±10V, ±5V, ±2.5V, ±1.25V, ±0.625V
Unipolar: 0 ~10V, 0 ~ 5V, 0 ~ 2.5V, 0 ~ 1.25V

4PCI-1713 User's Manual
•Maximum Input Overvoltage:±30V
•CommonMode RejectionRatio(CMRR)
Gain CMRR
0.5,1 75dB
2 80dB
4 84dB
8 84dB
•Maximumsamplingrate:100kHz
•Accuracy:(depending on gain)
Gain Accuracy
0.5,1 0.01% of FSR±1LSB
2 0.02%ofFSR±1LSB
4 0.02%ofFSR±1LSB
8 0.04% of FSR±1LSB
•Linearityerror:±1LSB
•Drift: Typical 30 PPM / °C ( 0 ~ 60 °C )
•Inputimpedance:1GΩ
•Trigger mode: Software, on-board programmable pacer or external
•Trigger Input: TTL level
Programmable Timer/Counter
•Counter chip: 82C54 or equivalent
•Counters: 3 channels, 16 bits
2 channels are permanently configured as programmable pacers;
1 channel is un-used.
•Time base:
Channel 1:10 MHz
Channel 2:Takes input from output of channel 1
Channel 0:un-used.

Chapter 1 General Information 5
General:
•I/O Connector: 37-pin D-type female connector
•Dimensions:175mmx100mm (6.9”x3.9”)
•Powerconsumption: +5V @ 850mA(Typical),
+5 V @ 1.0 A (Max.)
•Operatingtemperature:0~+60°C (32~ 140 °F) ( refertoIEC68-2-
1,2)
•Storagetemperature:-20~+70°C (-4~ 158 °F)
•Operating humidity: 5 ~ 95%RH non-condensing ( refer to IEC 68-
2-3 )
•MTBF:over 85,310 hrs @ 25 °C, grounded, fixed environment

6PCI-1713 User's Manual
1.4 Block Diagram
Figure 1-1: PCI-1713 block diagram
IsolationIsolationIsolation
PCI
Target
Controller
Address Bus Address
Decoder
10 MHz
OSC
Counter 1
Counter 2
Pacer
Gain
Code
Generator
ADC
Control
Logic
Channel
Code
Generator
Multiplexer
32 S.E.
or
16 Diff
PGIA
Isolation
EXT_TRG
Data Bus
INT
INT
Generator
+
PCIB
us
12 bit
A/D
Converter
AI 0
AI 1
AI31
Channel
Code

Chapter 2 Installation 7
2
Installation
CHAPTER

8PCI-1713 User's Manual
2.1 Initial Inspection
Before installing the PCI-1713, check the card for visible damage. We
have carefully inspected the card both mechanically and electrically
before shipment. It should be free of marks and in perfect order upon
receipt.
As you unpack the PCI-1713, check it for signs of shipping damage
(damaged box, scratches, dents, etc.). If it is damaged or fails to meet
specifications, notify our service department or your local sales
representative immediately. Also, call the carrier immediately and
retain the shipping carton and packing materials for inspection by the
carrier. We will then make arrangements to repair or replace the unit.
2.2 Unpacking
The PCI-1713 contains components that are sensitive and vulnerable
to static electricity. Discharge any static electricity on your body to
ground by touching the back of the system unit (grounded metal)
before you touch the board.
Remove the PCI-1713 card from its protective packaging by grasping
the card's rear panel. Handle the card only by its edges to avoid static
discharge which could damage its integrated circuits. Keep the
antistatic package. Whenever you remove the card from the PC,
protect the card by storing it in this package.
You should also avoid contact with materials that hold static electricity
such as plastic, vinyl and styrofoam.
Check the product contents inside the packing. There should be one
card, one CD-ROM, and this manual. Make sure nothing is missing.

Chapter 2 Installation 9
2.3 Installation Instructions
The PCI-1713 can be installed in any PCI slot in the computer.
However, refer to the computer user's manual to avoid any mistakes
and danger before you follow the installation procedure below:
1. Turn off your computer and any accessories connected to the
computer.
Warning! TURNOFFyourcomputerpowersupplywhenever
youinstall or remove any card,orconnect and
disconnect cables.
2. Disconnect the power cord and any other cables from the back of
the computer.
3. Remove the cover of the computer.
4. Select an empty +5 V PCI slot. Remove the screw that secures the
expansion slot cover to the system unit. Save the screw to secure
the interface card retaining bracket.
5. Carefully grasp the upper edge of the PCI-1713. Align the hole in
the retaining bracket with the hole on the expansion slot and align
the gold striped edge connector with the expansion slot socket.
Press the card into the socket gently but firmly. Make sure the card
fits the slot tightly.
6. Secure the PCI-1713 by screwing the mounting bracket to the back
panel of the computer.
7. Attach any accessories (37-pin D-type cable, wiring terminal board,
etc.) to the card.
8. Replace the cover of your computer. Connect the cables you
removed in step 2.
9. Turn the computer power on.

10 PCI-1713 User's Manual

Chapter 3 Signal Connections 11
3
Signal Connections
CHAPTER

12 PCI-1720 User's Manual
3.1 Overview
Correct signal connections are one of the most important factors in
ensuring that your application system is sending and receiving data
correctly. A good signal connection can avoid much unnecessary and
costly damage to your valuable PC and other hardware devices. This
chapter will provide some useful information about how to connect
analog input signals to the PCI-1713 card via the I/O connector.
3.2 I/O Connector
The I/O connector for the PCI-1713 card is a 37-pin D-type connector
which you can connect to 37-pin D-type accessories with Advantech's
PCL-10137 cable.
Note!: ThePCI-1713doesnot include the PCL-10137 cable
assembly.
The following figure shows the pin assignments for the 37-pin I/O
connector on the PCI-1713 card.
Figure3-1: I/O connector pin assignmentsfor the PCI-1713 card
1
2
20
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
AI0 AI1
AI2 AI3
AI4 AI5
AI6 AI7
AI8 AI9
AI10 AI11
AI12 AI13
AI14 AI15
GND
GND GND
GND
AI16
AI18
AI20
AI22
AI24
AI26
AI28
AI30
EXT_TRG
AI17
AI19
AI21
AI23
AI25
AI27
AI29
AI31

Chapter 3 Signal Connections 13
I/O Connector Signal Descriptions
Signal
Name Reference Direction Description
AI<0…31> GND Input
Analog Input Channels 0 through 31.
Each channel pair, AI<i, i+1> (i = 0, 2,
4...30), canbe configured as either two
single-ended inputs or one differential input.
GND - -
Ground. These pins are the reference
points for single-ended measurements and
the bias current return point for differential
measurement.
EXT_TRG GND Input
A/D External Trigger. This pin is the
external trigger signal input for the A/D
conversion. A low-to-high edge triggers A/D
conversion to happen.

14 PCI-1720 User's Manual
3.3 Analog Input Connections
This section continues to describe how to make analog input signal
connections to the PCI-1713 card via the I/O connector.
Single-ended Channel Connections
The single-ended input configuration has only one signal wire for
each channel, and the measured voltage (Vm) is the voltage of the
wire referred to the common ground.
A signal source without a local ground is also called a “floating
source”. It is fairly simple to connect a single-ended channel to a
floating signal source. In this mode, the PCI-1713 card provides a
reference ground for external floating signal sources.
Figure 3-2 shows a single-ended channel connection between a
floating signal source and an input channel on the PCI-1713 card.
Figure3-2:Single-endedinputchannelconnection
ExternalInternal
Floatin
g
Si
g
nal
Source
+
_
Vs
Multiplexers
AI31
AI1
AI0
PGIA
_
+
+
_
Vm
Measured
Voltage
I/O Connector
GND

Chapter 3 Signal Connections 15
Differential Channel Connections
The differential input configuration has two signal wires for each
channel, and the differential input responds only to voltage differenc-
es between High and Low inputs. On the PCI-1713 card, when all
channels are configured to differential input, up to 16 analog
channels are available.
If one side of the signal source is connected to a local ground, the
signal source is ground-referenced. The ground of the signal source
and the ground of the PCI-1713 will not be at exactly the same
voltage, as they are connected through the ground return of the
equipment and building wiring. The difference between the ground
voltages forms a common-mode voltage (Vcm).
To avoid the ground loop noise effect caused by common-mode
voltages, you can connect the signal ground to the Low input. Figure
3-3 shows a differential channel connection between a ground-
referenced signal source and an input channel on the PCI-1713 card.
With this connection, the PGIA rejects a common-mode voltage Vcm
between the signal source and the PCI-1713 ground, shown as Vcm in
Figure 3-3.
Figure3-3:Differentialinput channel connection with grounded referenced
signalsource
ExternalInternal
Ground-
Referenced
Si
g
nal
Source
Multiplexer
Multiplexer
PGIA
AI30
AI31
Measured
Volta
g
e
_
+
AI0
AI2
AI1
AI3
GND
I/O Connector

16 PCI-1720 User's Manual
If a floating signal source is connected to the differential input
channel, the signal source may exceed the common-mode signal
range of the PGIA, and the PGIA will be saturated with erroneous
voltage-readings. You must therefore reference the signal source to
theAIGND.
Figure 3-4 shows a differential channel connection between a floating
signal source and an input channel on the PCI-1713 card. In this
figure, each side of the floating signal source is connected through a
resistor to theAIGND. This connection can reject the common-mode
voltage between the signal source and the PCI-1713 card ground.
Figure3-4:Differential inputchannelconnection-floatingsignalsource
r
a
r
b
ExternalInternal
Multi
p
lexer
Multi
p
lexer
AI1
AI3
AI31
AI0
AI2
AI30
Floatin
g
Si
g
nal
Source
Measured
Volta
g
e
GND
_
+
PGIA_
+
I/O Connector