Advantech PCM-3718H User manual

PCM-3718H/3718HG
PC/104 12-bit DAS Module
with Programmable Gain
User's manual

Contents
CHAPTER 1: General Information........................ 1
1.1 Introduction .......................................................................... 2
1.2 Features................................................................................. 2
1.3 Specifications ......................................................................... 3
1.4 LocatingComponents ............................................................ 5
1.5 Daughterboards ..................................................................... 6
1.6 SoftwareSupport................................................................... 7
1.7 BlockDiagram ....................................................................... 8
CHAPTER 2: Installation ........................................ 9
2.1 InitialInspection ................................................................... 10
2.2 SwitchandJumperSettings .................................................. 10
2.3 ConnectorPinAssignments .................................................. 13
2.4 HardwareInstallation ........................................................... 15
2.5 SoftwareInstallation ............................................................. 16
CHAPTER 3: Signal Connections ........................ 17
3.1 AnalogInputSignalConnections .......................................... 18
3.2 ExpandingAnalogInputs ...................................................... 20
3.3 DigitalSignalConnections .................................................... 20
CHAPTER 4: Register Structure and Format.... 23
4.1 A/DDataRegisters-BASE+0/1.......................................... 25
4.2 SoftwareA/DTrigger-BASE+0 ......................................... 25
4.3 A/DRangeControl-BASE+1............................................. 26
4.4 MUXScan Register -BASE+2 ............................................ 27
4.5 DigitalI/ORegisters-BASE+3/11 ....................................... 28

4.6 A/DstatusRegister-BASE+8.............................................. 29
4.7 ControlRegister-BASE+9 ................................................. 31
4.8 PacerEnableRegister-BASE+10....................................... 32
4.9 ProgrammablePacerRegisters-BASE+12/13/14/15........... 33
CHAPTER 5: A/D Conversion .............................. 35
5.1 A/DDataFormatandStatusRegister................................... 36
5.2 InputRangeSelection........................................................... 37
5.3 MUXSetting ....................................................................... 37
5.4 TriggerMode ....................................................................... 38
5.5 A/DDataTransfer................................................................ 39
5.6 HowtoMake an A/D Conversion........................................ 40
CHAPTER 6: Digital Input/Output.......................41
CHAPTER 7: Programmable Pacer .................... 43
7.1 TheIntel8254 ..................................................................... 44
7.2 CounterRead/writeandControlRegister.............................. 45
7.3 CounterOperatingModes.................................................... 48
7.4 CounterOperations.............................................................. 50
7.5 CounterApplications............................................................ 51
CHAPTER 8: Direct Memory Access Operation 53
8.1 UsingDMATransferwiththePCM-3718H/3718HG........... 54
CHAPTER 9: Calibration...................................... 57
9.1 VRAssignment .................................................................... 58
9.2 A/DCalibration.................................................................... 58
APPENDIX A: Software Driver User Note ......... 61

1
General Information
CHAPTER

2PCM-3718H/3718HG User's Manual
1.1 Introduction
The PCM-3718H/3718HG is a high performance multifunction data
acquisition module that attaches to the PC/104 connector on your
CPU card or PC/104 module. It offers 12-bit A/D conversion and
digital input/output.
The automatic channel scanning circuitry and the on-board SRAM let
you perform multiple-channel A/D conversion with DMA and
individual channel gains.
The PCM-3718H/3718HG is an advanced new version of our popular
PCL-818 multifunction data acquisition card series. A custom 160-
pinASIC chip integrates the functions of a full-size DAS card. This
chip gives you maximum accuracy and reliability, along with
minimum cost, size and power consumption.
The resulting PC/104 module is fully software compatible with the
PCL-818H/818HG. This puts rich software support and a wide variety
of external signal conditioning boards at your disposal.
The PCM-3718H/3718HG is excellent for data acquisition, process
control, automatic testing and factory automation.
1.2 Features
•16 single-ended or 8 differential analog inputs, jumper selectable
•12-bitA/D converter, up to 100 kHz sampling rate with DMA
transfer
•Software programmable gain value for each analog input channel
•Software selectable input range for each analog input channel
•Two 8-bit digital input/output channels, TTL compatible
•Flexible triggering options: software trigger, programmable pacer
trigger and external pulse trigger
•Data transfer by program control, interrupt handler routine or DMA
•New-technology 160-pin 1.0µm CMOS ASIC chip

Chapter 1 Gerneral Information 3
1.3 Specifications
Analog Input:
•Channels: 16 single-ended or 8 differential, jumper selectable
•Resolution: 12 bits
•Inputrange: (software programmable,VDC)
PCM-3718H
Bipolar: ±10, ±5, ±2.5, ±1.25, ±0.625
Unipolar: 0 ~ 10, 0 ~ 5, 0 ~ 2.5, 0 ~ 1.25
PCM-3718HG
Bipolar: ±10, ±5, ±1, ±0.5, ±0.1, ±0.05, ±0.01, ±0.005
Unipolar: 0 ~ 10, 0 ~ 1, 0 ~ 0.1, 0 ~ 0.01
•Maximumdatathroughput
PCM-3718H: 100 kHz
PCM-3718HG: (variable, depending on PGIA settling time)
Gain Speed
0.5, 1 100 kHz
5,10 35 kHz
50,100 7 kHz
500,1000 770 Hz
•Accuracy: (depending on gain values)
PCM-3718H
Gain Accuracy
0.5,1 0.01% of FSR±1 LSB
2,4 0.02% of FSR±1 LSB
8 0.04% of FSR±1 LSB
PCM-3718HG
Gain Accuracy
0.5,1 0.01% of FSR±1 LSB
5,10 0.02% of FSR±1 LSB
50,100 0.04% of FSR±1 LSB for differential mode
500,1000 0.08% of FSR±1 LSB for differential mode

4PCM-3718H/3718HG User's Manual
•Differential nonlinearity error: ±1 LSB
•Inputimpedance: 1GΩ
•Trigger mode: Software, pacer or external trigger
•External trigger: TTL compatible
Digital Input/ Output:
•Channels:two 8-bit
•Level: TTL compatible
•Inputvoltage:
Logic 0: 0.8 V max.
Logic 1: 2.0 V min.
•Outputvoltage:
Logic 0: 0.33 V max. @ 6 mA (sink)
Logic 1: 3.84 V min. @ 6 mA (source)
Programmable pacer:
•Device: Intel 8254 or equivalent
•Counters: 3 channels, 16-bit.
Counter 1 and Counter 2 are permanently configured as a 32-bit
programmable pacer. Counter 0 is reserved for future development.
•Time base: (for Counter 1’s clock input)
10 MHz or 1 MHz, jumper selectable.
General:
•Power consumption: +5VDC @ 180mA (Typical)
+5VDC @ 400mA (Max.)
•Digital I/O connector: 20-pin post headers for I/O connection.
•Analog input connector: 20-pin post headers for I/O connection.
•Operating temperature: 0 to +60°C (refer to IEC 68-2-1, 2)
•Storage temperature: -20 to +70°C
•Operating humidity: 5 to 95% non-condensing
(refer to IEC 68-2-3)
•MTBF: over 235,346 hrs @ 25°C, ground, fix environment

Chapter 1 Gerneral Information 5
SW1
VR1 VR2 VR3
JP2
P1
JP1
P2
JP3
J1
1.4 Locating Components
Connectors,switchesandVRlocations
Label Function
J1 PC-bus connector
JP1 DMA level (1 or 3) and time base (1MHz or 10MHz)
JP2 Differential or single-ended inputs
JP3 DIO0 or external input
P1 Analog input
P2 Digital input/output connector
SW1 Base address
VR1 A/D full scale
VR2 A/D bipolar offset
VR3 A/D unipolar offset

6PCM-3718H/3718HG User's Manual
1.5 Daughterboards
We offer a wide variety of optional daughterboards to help you get
the most from your PCM-3718H/3718HG. You will need the PCLD-
780/880 Screw-terminal Board or the PCLD-8115 Wiring Terminal
Board to make connections.
PCLD-789D Amplifier/Multiplexer Board
This analog input-signal conditioning board multiplexes 16 differen-
tial inputs to one A/D input channel. A high-grade instrumentation
amplifier provides switch selectable gains of 1, 2, 10, 50, 100, 200,
1000.
PCLD-788 Relay Multiplexer Board
This board multiplexes up to 16 differential inputs to one analog
output channel. It offers isolated break-before-make high voltage
switching and a CJC circuit for thermocouple measurement.
PCLD-786 SSR I/O Module Carrier Board
This board holds eight opto-isolated solid state relay modules and
provides an additional eight outputs to drive external.
PCLD-785B and PCLD-885 Relay Output Boards
These boards let you control relays through the PCM-3718H/3718HG
16-bit digital output channels. The PCLD-785B provides 24 SPDT
relays, while the PCLD-885 provides 16 SPDT power relays.
PCLD-782B Isolated D/I Board
This board provides 24 opto-isolated digital inputs for connecting to
the PCM-3718H/3718HG digital input channels.
PCLD-779 Relay-isolated Multiplexer and Amplifier
Board
This board lets you easily make multi-channel temperature measure-
ments. We designed it for the cost-sensitive customer who requires
precision, low-level signal measurement and isolation for industrial
applications.

Chapter 1 Gerneral Information 7
1.6 Software Support
The PCM-3718H/3718HG comes with a powerful and easy-to-use
software driver. This driver makes application programming much
easier, especially when you use sophisticated features like interrupt or
DMA data transfer.
For building up a high performance Human Machine Interface (HMI),
you may need other supporting software beside our included driver to
the PCM-3718/3718HG. Please consult your representa-
tive for appropriate software packages.
GeniDAQ
GeniDAQ is a Windows-based data acquisition, control, analysis and
presentation development software package. In addition to typical
Human Machine Interface (HMI) functions, GeniDAQ features aVisual
Basic programming environment, and it provides numerous graphical
control and display icons to assist you in developing user’s HMI.
ActiveDAQ
ActiveDAQ is a collection of add-on ActiveX Control which provides
an easy-to-use property sheet interface for configuring analog/digital
input/output, counter/frequency, high-speed data acquisition and
controls. You can useActiveX control in Visual Basic, Delphi, Visual
C++ development environments for Windows 95/98/NT.
LabVIEW Driver
LabVIEW Driver supports National Instruments LabVIEW
4.1/5.0 and runs in Microsoft Windows 95/98 and Windows NT 4.0
environments.

8PCM-3718H/3718HG User's Manual
Data
Buffer
Status
Address
Decoder
Trigger
Logic
Divider
Two 8-bit
Digital In/Out
10 MHz
OSC
Counter #0 Counter #1 Counter #2
RAM Channel
Scan Logic
Data MUX MUX
16 S/E
or
8 Diff.
IRQ
Logic
DMA
Logic
12-bit A/D Converter
with
Sample and Hold
Prog. Gain
Amplifier
Out 1
Out 2
CLK 1 CLK 2
ASIC AD1801
IRQ Signals
DMA Signals
Address Bus
10 MHz
1 MHz
Register Select
Internal Data Bus
EOC
Digital Input / Output
External Trigger
Analog Input
1.7 Block Diagram
PC BUS

2
Installation
CHAPTER

10 PCM-3718H/3718HG User's Manual
2.1 Initial Inspection
We carefully inspected the PCM-3718H/3718HG mechanically and
electrically before we shipped it. It should be free of marks and
scratches and in perfect order on receipt.
As you unpack the PCM-3718H/3718HG, check it for signs of
shipping damages (damaged box, scratches, dents, etc.). If it is
damaged or fails to meet specifications, notify our service department
or your local sales representative immediately. We will then make
arrangement to repair or to replace the unit for you.
Discharge any static electricity on your body before touching the
board by touching the back of the system unit (grounded metal).
Also keep from materials of static electricity such as plastic, vinyl and
styrofoam.
Remove the PCM-3718H/3718HG from its protective packaging by
grasping the rear metal panel. Handle the module only by its edges to
avoid static electricity which could damage its integrated circuits.
Keep the anti-static packaging material for storage and protection
when you have to remove the module from its connector.
2.2 Switch and Jumper Settings
Ease-of-use is the primary design goal when we designed the PCM-
3718H/3718HG. This module has one function switch and seven
jumper settings.
The following sections tell you how to configure the module. You
may want to refer to the figure on page 5 for details of module
components.
Base address selection (SW1)
You control the PCM-3718H/3718HG’s operation by reading or
writing data to the PC’s I/O (input/output) port addresses. The PCM-
3718H/3718HG requires 16 consecutive address locations. The
switch SW1 sets the module’s base (beginning) address. Valid base

Chapter 2 Installation 11
addresses range from Hex 000 to Hex 3F0. Other devices in your
system can use some of these addresses.
We set the PCM-3718H/3718HG for a base address of Hex 300 at the
factory. If you need to adjust it to other address ranges, set SW1 by
referring to the following table:
ModuleI/Oaddresses(SW1)
Range(hex) Switchposition
123456
000 - 00F llllll
010 - 01F lllll¡
:
200 - 20F ¡lllll
210 - 21F ¡llll¡
:
*300 - 30F ¡¡llll
:
3F0 - 3FF ¡¡¡¡¡¡
¡= Off l= On * = default
Note: Switches 1-6 of the SW1 control the PC bus address
lines as follows:
Switch 123456
Line A9 A8 A7 A6 A5 A4

12 PCM-3718H/3718HG User's Manual
DMA channel and timer clock selection (JP1)
The PCM-3718H/3718HG supports DMA data transfer. The bottom
pins of JP1 provide selection of DMA channel 1 or 3, as shown in the
following figure.
The upper jumper of JP1 controls the input clock frequency for the
8254 programmable clock/timer of the module. You have two
choices: 10MHz and 1MHz. This lets you generate pacer output
frequencies from 2.5 MHz to 0.00023 Hz (71 minutes/pulse).
The following equation gives the pacer rate:
Pacer rate = Fclk / ( Div1 * Div2 )
(Fclk, 1MHz or 10MHz, is set by JP1 as illustrated above. Div1 and
Div2 are dividers set in counter 1 and counter 2 in the Intel 8254
counter. See page 51 for more information on the counter/timer
applications).
Channel configuration, S. E. or diff. (JP2)
The PCM-3718H/3718HG offers 16 single-ended or eight differential
analog input channels. Jumper JP2 sets the analog input channels as
16 single-ended or 8 differential inputs as below:
10M1M
DM1 DM3
C
hannel 1
10M1M
DM1 DM3
C
hannel 3
(
de
f
ault
)
10M1M
DM1 DM3
10 MHz
10M1M
DM1 DM3
1 MHz (default)
S/E DIFF
16 S.E. inputs
S/E DIFF
Eight differential inputs (default)

Chapter 2 Installation 13
External input or DIO selection (JP3)
You can use pin 1 on connector P2 for connection to digital I/O line 0
or to an external A/D trigger source jumper setting. Jumper JP3
provides the selection, as shown below:
2.3 Connector Pin Assignments
The PCM-3718H/3718HG has two on-board 20-pin flat-cable
connectors (insulation displacement, mass termination).
The figure on page 5 shows locations of both connectors.
Refer to the table below for abbreviations of the pin assignment.
Abbreviations Description
A/DS Analog input (single-ended)
A/DH Analog input high (differential)
A/DL Analog input low (differential)
A.GND Analog ground
DIO Digital input/output
D.GND Digital and power supply ground
DIO0 EXT
External trigger input
DIO0 EXT
Digital I/O line DIO 0 (default)

14 PCM-3718H/3718HG User's Manual
A/D S0
A/D S1
A/D S3
A/D S2
A/D S4
A/D S6
A/D S5
A/D S7
A.GND
A.GND
12
34
56
7
109 12
8
11
20
15 16
17 18
19
13 14
A/D S12
A.GND
A.GND
A/D S9
A/D S8
A/D S11
A/D S15
A/D S13
A/D S14
A/D S10
Connector P1 - Analog input, single-ended operation
Connector P1 - Analog input, differential-ended
operation
Connector P2 - Digital input /output
A/D H0
A/D H1
A/D H3
A/D H2
A/D H4
A/D H6
A/D H5
A/D H7
A.GND
A.GND
12
34
56
7
109 12
8
11
20
15 16
17 18
19
13 14
A/D L4
A.GND
A.GND
A/D L1
A/D L0
A/D L3
A/D L7
A/D L5
A/D L6
A/D L2
DIO 0
DIO 2
DIO 6
DIO 4
DIO 8
DIO 12
DIO 10
DIO 14
D.GND
12
34
56
7
109 12
8
11
20
15 16
17 18
19
13 14
DIO 9
D.GND
+5V
DIO 3
DIO 1
DIO 7
DIO 15
DIO 11
DIO 13
DIO 5
+12V

Chapter 2 Installation 15
2.4 Hardware Installation
Warning! TURNOFFyourPCpowersupplywheneveryouinstall
orremovethePCM-3718H/3718HGorconnectand
disconnect Cables.
Installing the module
1.Turn off the PC’s power. Turn off the power of any peripheral
devices such as printers and monitors.
2.Disconnect the power cord and any other cables from the back of
the computer.
3.Remove the system unit cover (see the user’s guide of your chassis if
necessary).
4.Remove the CPU card from the chassis (if necessary) to gain access
to the card’s PC/104 connector.
5.Connect the connector J1 of the PCM-3718H/3718HG to the PC/
104 connector. Carefully align the pins to the PC/104 connector.
Slide the module into the connector. The module pins may not slide
all the way into the connector; do not force the pins into place, or
the module may be damaged.
6.Fasten the module to the CPU card by using the included brass
screw. Screw the brass spacer into the threaded hole on the CPU
card. Do not tighten too much, or the threads may be damaged.
7.Attach any accessories to the PCM-3718H/3718HG using 20 pin
cables.
8.Reinstall the CPU card and replace the system unit cover. Recon-
nect the cables you removed in step 2. Plug in and turn on the
power.
This completes the hardware installation. Install the software driver
as described in the following section.

16 PCM-3718H/3718HG User's Manual
2.5 Software Installation
The PCM-3718H/3718HG includes a CD-ROM with utility software.
The CD-ROM contains:
1.A comprehensive I/O driver for A/D and digital I/O applications.
This driver lets you use standard functions, written in common
programming languages, to operate the PCM-3718H/3718HG. You
do not need to perform detailed register programming. The driver
supports the following languages: Microsoft Visual Basic, Visual
C++, Borland C++, C++ Builder and Delphi. Please refer to the
Software Driver User’s Manual for more information.
2.Demonstration programs
3.A calibration program
4.A test program