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OMB-DAQ-2416_4AO
User Manual
53 pgs2.52 Mb2
Table of contents
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Omega OMB-DAQ-2416_4AO User Manual

Table of Contents
Preface
About this User's Guide ....................................................................................................................... 5
What you will learn from this user's guide ......................................................................................................... 5
Conventions used in this user's guide ................................................................................................................. 5
Where to find more information ......................................................................................................................... 5
Chapter 1
Introducing the OMB-DAQ-2416-4AO ................................................................................................. 6
Overview: OMB-DAQ-2416-4AO features ....................................................................................................... 6
Software features ................................................................................................................................................ 6
Chapter 2
Installing the OMB-DAQ-2416-4AO ..................................................................................................... 7
What comes with your OMB-DAQ-2416-4AO shipment? ................................................................................ 7
Hardware .......................................................................................................................................................................... 7
Optional components ........................................................................................................................................................ 8
Additional documentation ................................................................................................ ................................................. 8
Unpacking the OMB-DAQ-2416-4AO .............................................................................................................. 8
Installing the software ........................................................................................................................................ 8
Installing the hardware ....................................................................................................................................... 8
Connecting to an OMB-AI-EXP32 with the DSUB37 expansion connector ..................................................... 9
Configuring the hardware ................................................................................................................................... 9
Connecting the board for I/O operations .......................................................................................................... 10
Connectors, cables – main I/O connector .........................................................................................................................10
Screw terminal pin out – differential ...............................................................................................................................11
Screw terminal pin out – single-ended .............................................................................................................................12
Chapter 3
Functional Details ............................................................................................................................... 13
OMB-DAQ-2416-4AO components ................................................................................................................. 13
LEDs ................................................................................................................................................................................14
USB connector .................................................................................................................................................................14
External power connector ................................................................................................................................................14
Screw terminal wiring ......................................................................................................................................................14
Mechanical drawings ........................................................................................................................................ 15
Block diagram .................................................................................................................................................. 16
Analog/TC input terminals ............................................................................................................................... 17
Analog input mode ...........................................................................................................................................................17
Thermocouple inputs .......................................................................................................................................................17
Noise filtering, data rate, and throughput rate ..................................................................................................................18
Multiple-channel throughput rates ...................................................................................................................................19
Input isolation ................................................................................................................................................... 20
Analog output terminals (VDAC0 through VDAC3) ................................ ....................................................... 21
Digital I/O ......................................................................................................................................................... 21
Internal pull-up/pull-down capability ..............................................................................................................................21
External pull-up/pull-down capability .............................................................................................................................22
Counter input terminals (CTR0, CTR1) ........................................................................................................... 23
3
Chapter 4
Calibrating the OMB-DAQ-2416-4AO ................................................................................................ 24
Calibration methods .......................................................................................................................................... 24
Factory calibration ...........................................................................................................................................................24
Self calibration .................................................................................................................................................................24
Chapter 5
Specifications ...................................................................................................................................... 25
Analog input ..................................................................................................................................................... 25
Channel configurations ..................................................................................................................................... 26
Compatible sensors ..........................................................................................................................................................26
Accuracy ........................................................................................................................................................... 26
Thermocouple measurement accuracy .............................................................................................................................26
Analog input DC voltage measurement accuracy ............................................................................................................35
Input bandwidth ...............................................................................................................................................................37
Noise performance ...........................................................................................................................................................37
Channel switching error ...................................................................................................................................................38
Throughput rate ................................................................................................................................................ 39
Analog voltage output ...................................................................................................................................... 40
Analog input/output calibration ........................................................................................................................ 41
Digital input/output........................................................................................................................................... 41
Counter ................................ ................................................................................................ ............................. 42
Memory ............................................................................................................................................................ 42
Microcontroller ................................................................................................................................................. 42
Power ................................................................................................................................ ................................ 43
USB specifications ........................................................................................................................................... 43
Environmental .................................................................................................................................................. 43
Mechanical ....................................................................................................................................................... 43
Screw terminal connector type and pin-out ...................................................................................................... 44
Screw terminal pin out .....................................................................................................................................................44
Optional OMB-AI-EXP32 expansion module .................................................................................................. 47
OMB-AI-EXP32 screw terminal pin out .........................................................................................................................49
OMB-DAQ-2416-4AO screw terminal pin out (with OMB-AI-EXP32 attached) ...........................................................51
4

Preface

About this User's Guide

What you will learn from this user's guide

This user's guide explains how to install, configure, and use the OMB-DAQ-2416-4AO so that you get the most out of its analog I/O, thermocouple (TC) input, digital I/O, and counter/timer I/O features.
This user's guide also refers you to related documents available on our web site, and to technical support resources.

Conventions used in this user's guide

For more information on …
Text presented in a box signifies additional information and helpful hints related to the subject matter you are reading.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
< : > Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as those assigned
to registers, bit settings, etc.
bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check boxes. For
example:
1. Insert the disk or CD and click the OK button.
italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase. For
example: The InstaCal installation procedure is explained in the OMB-DAQ-2416 Series Software User’s Guide. Never touch the exposed pins or circuit connections on the board.

Where to find more information

For additional information relevant to the operation of your hardware, refer to the Documents subdirectory where you installed the software, or search for your device on our website at www.omega.com.
5
Chapter 1

Introducing the OMB-DAQ-2416-4AO

Overview: OMB-DAQ-2416-4AO features

The OMB-DAQ-2416-4AO is supported under popular Microsoft® Windows® operating systems. The OMB­DAQ-2416-4AO is a multifunction measurement and control board designed for the USB bus.
The OMB-DAQ-2416-4AO is a full-speed, multiplexed 24-bit measurement system that provides up to 16 differential and up to 32 single-ended (SE) analog inputs. It offers software-selectable analog input ranges of ±20 V, ±10 V, ±5 V, ±2.5 V, ±1.25 V, ±0.625 V, ±0.312 V, ±0.156 V, and ±0.078 V.
It also protects your computer by providing a minimum of 500 VDC input isolation between field wiring and the USB interface.
You can configure up to 16 of the analog inputs as differential thermocouple (TC) inputs. In thermocouple mode, the OMB-DAQ-2416-4AO includes built-in cold-junction compensation and open thermocouple detection.
You can add up to 32 single-ended or up to 16 differential channels by connecting the OMB-DAQ-2416-4AO to an OMB-AI-EXP32 expansion module. Each channel is software-configurable as single-ended or differential. For each channel pair configured differentially, you lose one SE channel.
The OMB-DAQ-2416-4AO has four 16-bit analog output channels with an update rate of up to1102 S/s and an output range of ±10 V.
The device has eight high-speed lines of digital I/O and two 32-bit counters. You can expand up to 24 DIO channels by connecting the OMB-DAQ-2416-4AO to an OMB-AI-EXP32 expansion module.
Six banks of removable screw-terminal blocks provide connectivity to the analog input channels, digital I/O lines, counter/timer channels, and analog outputs.

Software features

For information on the features of InstaCal and the other software included with your OMB-DAQ-2416-4AO, refer to the OMB-DAQ-2416 Series Software User’s Guide that shipped with your device.
6

Installing the OMB-DAQ-2416-4AO

What comes with your OMB-DAQ-2416-4AO shipment?

As you unpack your OMB-DAQ-2416-4AO, verify that the following components are included.

Hardware

OMB-DAQ-2416-4AO
Chapter 2
USB cable (2-meter length)
OMB-DAQ-2416-ADAP (+5VDC, 10 Watt regulated power supply)
7

Optional components

Expansion devices that are compatible with the OMB-DAQ-2416-4AO must be ordered separately. If you ordered any of the following products with your device, they should be included with your shipment:
OMB-AI-EXP32 Analog input expansion module adds up to 16 differential or 32 single-ended inputs to the OMB-DAQ-2416-
4AO.

Additional documentation

In addition to this hardware user's guide, you should also receive the OMB-DAQ-2416 Series Software User’s Guide. This booklet supplies a brief description of the software you received with your OMB-DAQ-2416-4AO
and information regarding installation of that software. Please read this booklet completely before installing any software or hardware.

Unpacking the OMB-DAQ-2416-4AO

As with any electronic device, you should take care while handling to avoid damage from static electricity. Before removing the OMB-DAQ-2416-4AO from its packaging, ground yourself using a wrist strap or by simply touching the computer chassis or other grounded object to eliminate any stored static charge.
If any components are missing or damaged, notify Omega Engineering immediately by phone, fax, or e-mail.
Phone: (203) 359-1660 Fax: (203) 359-7700 Email: das@omega.com

Installing the software

Refer to the OMB-DAQ-2416 Series Software User’s Guide for instructions on installing the software on the OMB-DAQ-2416 Series Data Acquisition Software CD. This booklet is available in PDF at
www.omega.com/manuals.
We recommend that you download the latest Windows Update onto your computer before installing and operating the OMB-DAQ-2416-4AO.

Installing the hardware

To connect the OMB-DAQ-2416-4AO to your system, turn your computer on, and then do the following:
1. Connect the OMB-DAQ-2416-ADAP power supply to the device's external power connector, and plug the
other end into a power outlet.
2. Connect the USB cable to the device's USB connector and to a USB port on your computer. A USB2.0 port
is recommended.
8
When you connect the OMB-DAQ-2416-4AO for the first time, a Found New Hardware message opens as the OMB-DAQ-2416-4AO is detected. When the message closes, the installation is complete.
The power LED (bottom LED) blinks during device detection and initialization, and then remains solid if properly detected. If not, check if the OMB-DAQ-2416-4AO has sufficient power. When the device is first powered on, there is usually a momentary delay before the power LED begins to blink, or come on solid.
Caution! Do not disconnect any device from the USB bus while the computer is communicating with the
OMB-DAQ-2416-4AO, or you may lose data and/or your ability to communicate with the OMB­DAQ-2416-4AO.

Connecting to an OMB-AI-EXP32 with the DSUB37 expansion connector

Use the 37-pin expansion connector to connect the OMB-DAQ-2416-4AO to an OMB-AI-EXP32 expansion module.
To connect the two devices directly to each other, follow these steps.
1. Disconnect the USB cable from the OMB-DAQ-2416-4AO.
2. Remove the external power cable from the OMB-DAQ-2416-4AO.
3. Connect the two devices together by inserting the OMB-AI-EXP32's DSUB37 connector into the DSUB37
connector on the OMB-DAQ-2416-4AO.
Figure 1. OMB-DAQ-2416-4AO directly connected to an OMB-AI-EXP32
4. Turn the connected modules over and secure the connection by screwing the connection plate to both
modules, as shown below.
Figure 2. OMB-DAQ-2416-4AO secured to an OMB-AI-EXP32
5. Connect the external power supply to the OMB-DAQ-2416-4AO's external power connector, and plug the
other end into an AC outlet.
6. Connect the USB cable from the OMB-DAQ-2416-4AO to the host computer's USB port.
Connect to a USB 2.0 high speed hub to achieve the highest transfer rate (480 Mbps). When connected to a USB 1.1 full-speed port, the transfer rate is limited to 12 Mbps.

Configuring the hardware

Except for the DIO pull-up selection, all hardware configuration options on the OMB-DAQ-2416-4AO are software controlled. You can select some of the configuration options using InstaCal, such as the analog input configuration (single-ended or differential channels). When measuring from thermocouples, make sure you configure the channels for differential mode.
9
Main connectors
Six banks of detachable screw terminals
Compatible accessory product for the 37-pin expansion connector
OMB-AI-EXP32 expansion board with screw terminals (connects directly to the OMB-DAQ-2416-4AO)
Caution! Turn off power to all devices connected to the system before making connections. Electrical shock
or damage to equipment can result even under low-voltage conditions.
Caution! Always handle components carefully, and never touch connector terminals or circuit components
unless you are following ESD guidelines in an appropriate ESD-controlled area. These guidelines include using properly-grounded mats and wrist straps, ESD bags and cartons, and related procedures.
Avoid touching board surfaces and onboard components. Only handle boards by their edges. Make sure the OMB-DAQ-2416-4AO does not come into contact with foreign elements such as oils, water, and industrial particulate.
The discharge of static electricity can damage some electronic components. Semiconductor devices are especially susceptible to ESD damage.

Connecting the board for I/O operations

Connectors, cables – main I/O connector

The following table lists the board connectors and compatible accessory products for the OMB-DAQ-2416­4AO.
Main connector specifications
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49 NC No connection 50 CH15L Channel 15 LO 51 CH15H Channel 15 HI 52 NC No connection 53 NC No connection 54 CH14L Channel 14 LO 55 CH14H Channel 14 HI 56 NC No connection 57 NC No connection 58 CH13L Channel 13 LO 69 CH13H Channel 13 HI 60 NC No connection 61 NC No connection 62 CH12L Channel 12 LO 63 CH12H Channel 12 HI 64 NC No connection
No connection NC 1 Channel 0 HI CH0H 2 Channel 0 LO CH0L 3
No connection NC 4 No connection NC 5
Channel 1 HI CH1H 6 Channel 1 LO CH1L 7
No connection NC 8 No connection NC 9
Channel 2 HI CH2H 10 Channel 2 LO CH2L 11
No connection NC 12 No connection NC 13
Channel 3 HI CH3H 14 Channel 3 LO CH3L 15
No connection NC 16
No connection NC 17
Analog ground GND 18 Channel 4 HI CH4H 19 Channel 4 LO CH4L 20
No connection NC 21 No connection NC 22
Channel 5 HI CH5H 23 Channel 5 LO CH5L 24
No connection NC 25 No connection NC 26
Channel 6 HI CH6H 27 Channel 6 LO CH6L 28
No connection NC 29 No connection NC 30
Channel 7 HI CH7H 31 Channel 7 LO CH7L 32
No connection NC 33 No connection NC 34
+5 V output +5V 35 Analog ground GND 36 Analog out 0 VDAC0 37 Analog out 1 VDAC1 38 Analog ground GND 39 Analog out 2 VDAC2 40 Analog out 3 VDAC3 41 Analog ground GND 42 Counter input 0 CTR0 43 Analog ground GND 44 Counter input 1 CTR1 45 Analog ground GND 46
No connection NC 47 No connection NC 48
65 NC No connection 66 GND Analog ground 67 CH11L Channel 11 LO 68 CH11H Channel 11 HI 69 NC No connection 70 NC No connection 71 CH10L Channel 10 LO 72 CH10H Channel 10 HI 73 NC No connection 74 NC No connection 75 CH9L Channel 9 LO 76 CH9H Channel 9 HI 77 NC No connection 78 NC No connection 79 CH8L Channel 8 LO 80 CH8H Channel 8 HI
81 GND Analog ground 82 NC No connection 83 NC No connection 84 GND Analog ground 85 DIO7 Digital input/output 86 DIO6 Digital input/output 87 DIO5 Digital input/output 88 DIO4 Digital input/output 89 DIO3 Digital input/output 90 DIO2 Digital input/output 91 DIO1 Digital input/output 92 DIO0 Digital input/output 93 DGND Digital I/O ground 94 DGND Digital I/O ground 95 NC No connection 96 NC No connection

Screw terminal pin out – differential

Figure 3. 16-channel differential mode pin out
Differential connection guidelines
When connecting differential voltage inputs to a "floating" voltage source, make sure there is a DC return
path from each voltage input to ground. You make this path by connecting a resistor from each input to a GND pin (pins 18, 36, 39, 42, 44, 46, 66, 81, 84). A value of approximately 100 kΩ can be used for most applications.
Leave any unused input channels either floating or tied to GND (pins 18, 36, 39, 42, 44, 46, 66, 81, 84). Source impedances should be kept as small as possible to avoid settling time and accuracy errors.
When configuring thermocouple sensors, keep any stray capacitance as small as possible relative to GND
(pins 18, 36, 39, 42, 44, 46, 66, 81, 84) to avoid settling time and accuracy errors. For thermocouple channels, do not provide a return path to ground. This is done internally.
11
49 NC No connection 50 CH15L Channel 31 51 CH15H Channel 15 52 NC No connection 53 NC No connection 54 CH14L Channel 30 55 CH14H Channel 14 56 NC No connection 57 NC No connection 58 CH13L Channel 29 69 CH13H Channel 13 60 NC No connection 61 NC No connection 62 CH12L Channel 28 63 CH12H Channel 12 64 NC No connection
No connection NC 1 Channel 0 CH0H 2 Channel 16 CH0L 3
No connection NC 4 No connection NC 5
Channel 1 CH1H 6 Channel 17 CH1L 7
No connection NC 8 No connection NC 9
Channel 2 CH2H 10 Channel 18 CH2L 11
No connection NC 12 No connection NC 13
Channel 3 CH3H 14 Channel 19 CH3L 15
No connection NC 16
No connection NC 17
Analog ground GND 18 Channel 4 CH4H 19 Channel 20 CH4L 20
No connection NC 21 No connection NC 22
Channel 5 CH5H 23 Channel 21 CH5L 24
No connection NC 25 No connection NC 26
Channel 6 CH6H 27 Channel 22 CH6L 28
No connection NC 29 No connection NC 30
Channel 7 CH7H 31 Channel 23 CH7L 32
No connection NC 33 No connection NC 34
+5 V output +5V 35 Analog ground GND 36 Analog out 0 VDAC0 37 Analog out 1 VDAC1 38 Analog ground GND 39 Analog out 2 VDAC2 40 Analog out 3 VDAC3 41 Analog ground GND 42 Counter input 0 CTR0 43 Analog ground GND 44 Counter input 1 CTR1 45 Analog ground GND 46
No connection NC 47 No connection NC 48
65 NC No connection 66 GND Analog ground 67 CH11L Channel 27 68 CH11H Channel 11 69 NC No connection 70 NC No connection 71 CH10L Channel 26 72 CH10H Channel 10 73 NC No connection 74 NC No connection 75 CH9L Channel 25 76 CH9H Channel 9 77 NC No connection 78 NC No connection 79 CH8L Channel 24 80 CH8H Channel 8
81 GND Analog ground 82 NC No connection 83 NC No connection 84 GND Analog ground 85 DIO7 Digital input/output 86 DIO6 Digital input/output 87 DIO5 Digital input/output 88 DIO4 Digital input/output 89 DIO3 Digital input/output 90 DIO2 Digital input/output 91 DIO1 Digital input/output 92 DIO0 Digital input/output 93 DGND Digital I/O ground 94 DGND Digital I/O ground 95 NC No connection 96 NC No connection
NC.....
NC.....
DIO_LOAD1.....
DIO_LOAD2.....
IMEN7.....
IMEN8.....
IMEN9.....
IMEN10.....
IM_A0.....
IM_A1.....
IM_A2.....
NC.....
NC.....
VCC.....
GND.....
NC.....
GND.....
NC.....
GND.....
......EGND
......NC
......SCK
......MOSI
......SDA
......SCL
......CM_A2
......SM_A0
......SM_A1
......CM_A3
......EXTDIO_INT
......VDD_ISO
......-20.5 V
......AGND
......+20.5 V
......+5 VA
......GND
......+3.3 V_ISO
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

Screw terminal pin out – single-ended

The OMB-AI-EXP32 expansion port is intended to interface directly with the OMB-DAQ-2416-4AO. Do not attempt to use any of the expansion port pins for any other purpose.
Power down the OMB-DAQ-2416-4AO before you connect it the OMB-AI-EXP32 expansion board.
Figure 4. 32-channel single-ended mode pin out
Figure 5. DSUB37 expansion connector pin out
12
Analog/TC input screw terminal blocks
· CH 0 – CH 7 differential
· CH 0 – CH 7, CH 16 - CH 23 SE
Analog output and counter screw terminal blocks
Activity
LED
Power
LED
USB
connector
External power
connector
Digital I/O screw terminal blocks
Analog/TC input screw terminal blocks
· CH 8 - CH 15 differential
· CH 8 - CH 31 single-ended
37-pin
expansion connector

Functional Details

This chapter contains detailed information on all of the features available from the board, including:
Device components Functional block diagram and mechanical drawings Signal descriptions Signal diagrams using default or conventional device settings

OMB-DAQ-2416-4AO components

These OMB-DAQ-2416-4AO components are shown in Figure 6 and Figure 7.
One USB connector One external power connector Two LED indicators ("Power" and "Activity") One 37-pin DSUB expansion connector Six removable screw terminal blocks
Chapter 3
Figure 6. Front view components
Figure 7. Rear view components
13

LEDs

When the OMB-DAQ-2416-4AO is connected to a computer, in its normal idle state both LEDs are lit solid green.
Power LED
The Power LED is the top LED on the right side of the OMB-DAQ-2416-4AO housing. The Power LED blinks when you plug the power supply into the OMB-DAQ-2416-4AO, and continues to blink
while the device initializes the hardware. If it continues blinking for more than ½ second, then there is a problem with the OMB-DAQ-2416-4AO and you should cycle the power.
If an application issues a "blink LED" command, then the power LED blinks a few times.
Activity LED
The (USB) Activity LED is the bottom LED on the right side of the OMB-DAQ-2416-4AO housing. It blinks rapidly when both the USB cable and external power cables are plugged in. It continues blinking rapidly while the device is connecting to the computer, and then turns solid.
Whenever the device receives a USB command, the Activity LED blinks off and then returns to solid green. When an analog in or analog out scan is running, the Activity LED blinks continuously.

USB connector

The USB connector provides communication.

External power connector

Connect the OMB-DAQ-2416-ADAP power supply to this connector. The power supply provides 5 VDC, 10W regulated power.

Screw terminal wiring

The OMB-DAQ-2416-4AO has six groups of screw terminals—three on each side of the housing. Each group has 16 connections. Pin numbers are identified in Figure 3 on page 11 and Figure 4 on page 12.
14
4.800

Mechanical drawings

Figure 8. OMB-DAQ-2416-4AO internal dimensions
Figure 9. OMB-DAQ-2416-4AO case dimensions
15

Block diagram

Figure 10 shows a simplified block diagram of the OMB-DAQ-2416-4AO. This device provides all of the functional elements shown in the figure.
Figure 10. OMB-DAQ-2416-4AO functional block diagram
16
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