JYTEK USB-61900 Series User manual

Advance Technologies; Automate the World.
Manual Rev.: 1.00
Revision Date: August 31, 2017
USB-61900 Series
16-bit 250kS/s USB 2.0-based High-performance
DAQ Module
USB-61901/61902/61903
User’s Manual

Preface iii
Preface
Copyright
This document contains proprietary information protected by
copyright. All rights are reserved. No part of this manual may be
reproduced by any mechanical, electronic, or other means in any
form without prior written permission of the manufacturer. All
specifications are subject to change without further notice.
Disclaimer
The information in this document is subject to change without prior
notice in order to improve reliability, design, and function and does
not represent a commitment on the part of the manufacturer.
In no event will the manufacturer be liable for direct, indirect, spe-
cial, incidental, or consequential damages arising out of the use or
inability to use the product or documentation, even if advised of
the possibility of such damages.
Environmental Responsibility
JYTEK is committed to fulfill its social responsibility to global envi-
ronmental preservation through compliance with the European
Union's Restriction of Hazardous Substances (RoHS) directive
and Waste Electrical and Electronic Equipment (WEEE) directive.
Environmental protection is a top priority for JYTEK. We have
enforced measures to ensure that our products, manufacturing
processes, components, and raw materials have as little impact on
the environment as possible. When products are at their end of
life, our customers are encouraged to dispose of them in accor-
dance with the product disposal and/or recovery programs pre-
scribed by their nation or company.
Trademarks
Product names mentioned herein are used for identification pur-
poses only and may be trademarks and/or registered trademarks
of their respective companies.

iv Preface
Using this Manual
Audience and Scope
The USB-61900 Series User’s Manual is intended for hardware
technicians and systems operators with knowledge of installing,
configuring and operating industrial grade single board computers.
Manual Organization
This manual is organized as follows:
Preface: Presents important copyright notifications, disclaimers,
trademarks, and associated information on the proper understand-
ing and usage of this document and its associated product(s).
Introduction: Introduces the USB-61900 Series, its features. specifica-
tions, and river information.
Hardware Information: Provides information on dimensions, connec-
tion, accessories, and pin assignments for the USB-61900 Series.
Installing the USB-61900 Series Module: Describes installation and ini-
tialization of USB-61900 Series hardware and software components.
Operation: USB-61900 Series functions described here include A/D con-
version, D/A conversion, encoder, programmable function I/O, and oth-
ers.
Calibration: This chapter introduces the calibration process to minimize
AD measurement errors and DA output errors.
Important Safety Instructions: Presents safety instructions all users
must follow for the proper setup, installation and usage of equipment
and/or software.
Warranty Policy: This presents the JYTEK Warranty Policy terms
and coverages.
Getting Service: Contact information for JYTEK’s worldwide
offices.

Preface v
Conventions
Take note of the following conventions used throughout this
manual to make sure that users perform certain tasks and
instructions properly.
NOTE:
NOTE:
Additional information, aids, and tips that help users perform
tasks.
CAUTION:
Information to prevent minor physical injury, component dam-
age, data loss, and/or program corruption when trying to com-
plete a task.
WARNING:
Information to prevent serious physical injury, component
damage, data loss, and/or program corruption when trying to
complete a specific task.

Table of Contents vii
Table of Contents
Preface .......................................................................................... iii
Table of Contents.......................................................................... vii
List of Figures................................................................................. xi
List of Tables ................................................................................ xiii
1 Introduction.............................................................................. 1
1.1 Overview........................................................................................ 1
1.2 Features ......................................................................................... 1
1.3 Applications ................................................................................... 2
1.4 Specifications ................................................................................. 3
1.4.1 General Specifications .........................................................3
1.4.2 Analog Input ........................................................................4
1.4.3 Analog Output .....................................................................7
1.5 Unpacking Checklist....................................................................... 8
1.6 Software Support........................................................................... 8
1.7 Driver Support for Windows.......................................................... 8
1.8 Utilities for Windows ..................................................................... 9
2 Hardware Information ............................................................ 11
2.1 Overview and Dimensions ........................................................... 11
2.1.1 Module ..............................................................................11
2.1.2 Module Stand ....................................................................14
2.1.3 Rail Mounting ....................................................................18
2.1.4 Wall Mounting...................................................................20
2.2 Connector Pin Assignment........................................................... 21
2.2.1 Connector Signal Description ............................................24
2.3 Analog Input Signal Connection................................................... 24

viii Table of Contents
3 Installing the USB-61900 Series Module ................................... 31
3.1 Connecting the USB-61900 Series Module.................................. 31
3.2 Device ID...................................................................................... 32
3.3 Hardware Configuration.............................................................. 33
4 Operation ................................................................................ 35
4.1 Signal Function ............................................................................ 35
4.2 A/D Conversion ........................................................................... 36
4.2.1 Analog Input Circuitry ....................................................... 37
4.2.2 AI Data Format .................................................................. 37
4.2.3 Software Conversion with Polling Data Transfer Acquisition
Mode (Software Polling) ................................................... 38
4.2.4 Continuous Acquisition (Scanning) Mode ......................... 38
4.2.5 Analog Input Triggering..................................................... 41
4.3 Trigger Sources............................................................................ 41
4.3.1 Software Triggering........................................................... 41
4.3.2 External Analog Triggering ................................................ 42
4.3.3 External Digital Triggering ................................................. 43
4.4 Trigger Modes ............................................................................. 43
4.4.1 Post-Trigger Acquisition Mode (no retriggering) .............. 44
4.4.2 Delayed-Trigger Acquisition Mode (no
retriggering) ...................................................................... 44
4.4.3 Post-Trigger or Delayed-Trigger Acquisition with Retriggering
45
4.4.4 Gated Trigger .................................................................... 46
4.5 D/A Conversion ........................................................................... 47
4.5.1 Bipolar Output Modes....................................................... 48
4.5.2 Software Update ............................................................... 48
4.5.3 Waveform Generation ...................................................... 48
4.5.4 Waveform Trigger Sources................................................ 51
4.5.5 Waveform Generation Trigger Modes .............................. 52
4.6 Programmable Function I/O........................................................ 56
4.6.1 TTL DI/DO .......................................................................... 56

Table of Contents ix
4.6.2 General Purpose Timer/Counter .......................................57
4.7 Basic Timer/Counter Function ..................................................... 57
4.8 General Purpose Timer/Counter Modes ..................................... 58
4.8.1 Mode 1: Simple Gated-Event Counting .............................58
4.8.2 Mode 2: Single Period Measurement................................59
4.8.3 Mode 3: Single Pulse-Width Measurement.......................59
4.8.4 Mode 4: Single-Gated Pulse Generation ...........................60
4.8.5 Mode 5: Single-Triggered Pulse.........................................60
4.8.6 Mode 6: Re-Triggered Single Pulse Generation.................61
4.8.7 Mode 7: Single-Triggered Continuous Pulse Generation ..62
4.8.8 Mode 8: Continuous Gated Pulse Generation...................62
4.8.9 Mode 9: Edge Separation Measurement ..........................62
4.8.10 Mode 10: PWM Output .....................................................63
5 Calibration .............................................................................. 65
5.1 Loading Calibration Constants ..................................................... 65
5.2 Auto-Calibration (USB-61901/61902 only) .................................. 65
5.3 Saving Calibration Constants ....................................................... 66
Important Safety Instructions ...................................................... 67
Warranty Policy ........................................................................... 69
Getting Service............................................................................. 71

List of Figures xi
List of Figures
Figure 2-1: USB-61902 Module Rear View ..........................................11
Figure 2-2: USB-61902 Module Side View ...........................................12
Figure 2-3: USB-61902 Module Front View .........................................13
Figure 2-4: Module, Stand, Connector, and USB Cable .......................14
Figure 2-5: Module, Stand, & Wall Mount Kit Side View (w/ connections)
14
Figure 2-6: Module in Stand Front View..............................................15
Figure 2-7: Module Stand Top View ....................................................16
Figure 2-8: Module Stand Side Cutaway View.....................................17
Figure 2-9: Module Stand Front View..................................................17
Figure 2-10: Rail Mount Kit....................................................................18
Figure 2-11: Module Pre-Rail Mounting ................................................18
Figure 2-12: Module Rail-Mounted .......................................................19
Figure 2-13: Wall Mount Holes..............................................................20
Figure 2-14: Module with Wall Mount Apparatus.................................20
Figure 2-15: Floating source w/ RSE input connections ........................26
Figure 2-16: GRND-Referenced Sources w/ NRSE Inputs ......................27
Figure 2-17: GRND-Referenced Source w/ P-D Input ............................27
Figure 2-18: Floating Source w/ P-D Input.............................................28
Figure 2-19: Current Input .....................................................................29
Figure 3-1: USB-61900 module in Windows Device Manager.............32
Figure 3-2: Device ID Selection Control ...............................................32
Figure 4-1: Functional Block Diagram (USB-61902).............................36
Figure 4-2: Analog Input ......................................................................37
Figure 4-3: Analog Input Scan Timing ..................................................39
Figure 4-4: Below-Low Analog Triggering............................................42
Figure 4-5: Above-High Analog Triggering...........................................43
Figure 4-6: Digital Triggering ...............................................................43
Figure 4-7: Post Trigger without Retriggering .....................................44
Figure 4-8: Delayed Trigger..................................................................45
Figure 4-9: Post Trigger or Delay Trigger with Retriggering ................46
Figure 4-10: Gated Trigger.....................................................................47
Figure 4-11: Waveform Generation for Two Channel Update ..............49
Figure 4-12: FIFO Data In/Out Structure................................................49
Figure 4-13: Waveform Generation Hardware Timing ..........................51
Figure 4-14: Post-Trigger Waveform Generation ..................................52
Figure 4-15: Delayed-Trigger Waveform Generation ............................53
Figure 4-16: Post-Trigger or Delayed-Trigger with Retriggering............54

xii List of Figures
Figure 4-17: Infinite Iteration Waveform Generation ........................... 55
Figure 4-18: Mode 1-Simple Gated-Event Calculation .......................... 58
Figure 4-19: Mode 2-Single Period Measurement ................................ 59
Figure 4-20: Mode 3-Single Pulse-Width Measurement....................... 60
Figure 4-21: Mode 4-Single-Gated Pulse............................................... 60
Figure 4-22: Mode 5-Single-Triggered Pulse ......................................... 61
Figure 4-23: Mode 6-Re-Triggered Single Pulse .................................... 61
Figure 4-24: Mode 7-Single-Triggered Continuous Pulse...................... 62
Figure 4-25: Mode 8-Continuous Gated Pulse ...................................... 62
Figure 4-26: Mode 9-Edge Separation Measurement........................... 63
Figure 4-27: Mode 10-PWM Output ..................................................... 63

List of Tables xiii
List of Tables
Table 2-1: USB-61901/61902 pin assignment in single-end AI mode......21
Table 2-2: USB-61901/61902 pin assignment in pseudo-differential AI mode
22
Table 2-3: USB-61903 pin assignment .....................................................23
Table 2-4: CN1/CN2 I/O Signal Description..............................................24
Table 4-1: Bipolar Analog Input Range and Output Digital Code.............37
Table 4-2: Bipolar Output Code ...............................................................48
Table 4-3: Waveform Generation Timer Definition .................................50
Table 4-4: Pin Definition of TTL Digital I/O...............................................56
Table 4-5: Timer/Counter Pin Definition..................................................57

Introduction 1
1 Introduction
1.1 Overview
The USB-61900 Series of 16-bit 250 kS/s USB 2.0-based
high-performance DAQ modules includes models
USB-61901/61902, featuring four different voltage input ranges,
and USB-61903, with additional built-in precision current-to-volt-
age resistors capable of direct measurement of current signal from
0 to 20 mA.
The series also delivers 2-CH, 16-bit analog output capable of up
to 1 MS/s update and programmable function I/O. The software
programmable function I/O supports a variety of functions includ-
ing TTL digital I/O, general-purpose timer/counter, and PWM out-
put. The USB-61900 Series’ analog input, analog output, and
function I/O are capable of functioning simultaneously at full
speed.
The modules are USB-powered and equipped with removable
screw-down terminals for easy wiring. The attached multi-func-
tional stand can be used for desktop, rail, or wall mounting.
Suitable for mixed-signal tests, laboratory research, and factory
automation, the USB-61900 Series provides a significant sin-
gle-board solution with optimum integration of multiple tasks at an
affordable price.
1.2 Features
High-speed USB 2.0
USB power supply
16-CH voltage input and 2-CH voltage output (USB-61902)
16-CH voltage input (USB-61901)
8-CH current input and 2-CH voltage output (USB-61903)
Up to 250 kS/s analog input
Up to 1 MS/s analog output (USB-61902/61903)
Programmable 8-CH digital input and 4-CH digital output
Removable screw-down terminal module
Lockable USB cable for secure connectivity

2 Introduction
1.3 Applications
Automotive testing
Waveform generation
Laboratory research
Biotech measurement
I/O control

Introduction 3
1.4 Specifications
1.4.1 General Specifications
I/O Specifications
Number of channels 8-CH programmable function digital input (DI)
4-CH programmable function digital output
(DO)
Compatibility TTL (single-end) (supports 3.3V and 5 V DI but
3.3V DO)
Input voltage Logic low: VIL = 0.8 V max; IIL = 0.2 mA
max.Logic high: VIH = 2.0 V min.; IIH = 0.2 mA
max.
Output voltage Logic low: VOL = 0.5 V max; IOL = 10 mA max.
Logic high: VOH = 2.6V min.; IIH = 10 mA max.
Supporting modes (only one
can be selected and function at
the same time, please see
Section 4.6: Programmable
Function I/O)
8-CH TTL DI and 4-CH TTL DO
2-CH 32-bit general-purpose timer/counters:
Clock source: internal or external
Max source frequency: internal: 80 MHz;
external: 10 MHz
2-CH PWM outputs”:
Duty cycle:1-99% (please see Section 4.8.10:
Mode 10: PWM Output)
Modulation frequency: 20 MHz to 0.005Hz
Data transfers Programmed I/O
Physical, Power, and Operating Environment
Interface High speed USB 2.0 compatible, mini-USB
connector
Dimensions 156 (L) x 114 (W) x 41 (H) mm (6.14 X 4.49 X 1.61
in.)
I/O Connector Two 20-pin removable screw-down terminals
Power requirement USB power (5 V @ 400 mA)
Operating environment Ambient temperature: 0 to 55C
Relative humidity: 10% to 90%, non-condensing
Storage environment Ambient temperature: -20 to 70 C
Relative humidity: 5% to 95%, non-condensing

4 Introduction
1.4.2 Analog Input
Analog Input (AI)
USB-61901/61902 USB-61903
General
Number of
channels:
(programmable)
Voltage
input
16 single-end (SE) or 8
pseudo-differential input N/A
Current
Input N/A 8 differential
A/D converter AD7610 or equivalent
Maximum sampling rate 250K samples/s (single channel)
250K/N-channel samples/s (scanning)
Resolution 16 bit
Input coupling DC
Programmable
input range
Voltage ± 10 V,± 2 V, ± 1 V,
± 200 mV N/A
Current N/A 0~20 mA
Current-to-voltage
conversion resistor N/A 249.5
Operational common mode
voltage range ± 0.1 V
Overvoltage protection Power on: continuous ± 15 V
Power off: continuous ± 2 V
FIFO buffer size 4k samples
Data transfers Programmed I/O, continuous (bulk transfer
mode)
Channel Gain Queue
configuration size 256
Input impedance >1 GN/A
Trigger source Software, External analog or digital
Trigger mode
Post trigger, delay trigger, post trigger with
re-trigger, delay trigger with re-trigger, gated
trigger
Time-based source Internal 80 MHz

Introduction 5
Electrical
Offset error (gain=1) ±0.1 mV (typical) ±0.01 mA (typical)
Gain error (gain=1) ±0.05% of FSR (typical) ±0.05% of FSR
(typical)
–3dB small signal
bandwidth 1600 kHz N/A
System noise 20.3 LSBRMS N/A
CMRR4 93 dB N/A
Spurious-free dynamic
range (SFDR) 2 108 dB N/A
Signal-to-noise and
distortion ratio (SINAD) 289 dB N/A
Total harmonic distortion
(THD) 2 102 dB N/A
Signal-to-noise ratio
(SNR) 2 89 dB N/A
Effective number of bits
(ENOB) 3 14.5 N/A
NOTE:
NOTE:
Notes:
1. Small signal bandwidth input ranges as fol-
low in Table 1
2. Input ranges for System Noise, SFDR,
SINAD, THD, and SNR as follow in Table 2
3. ENOB input ranges as follow in Table 3
4. CMRR input ranges as follow in Table 4
Analog Input (AI)
USB-61901/61902 USB-61903

6 Introduction
1. -3dB small signal bandwidth: (Typical, 25°C, single-ended)
2. System Noise, SFDR, SINAD, THD, SNR (Typical, 25°C, sin-
gle-ended)
3. Effective number of bits (ENOB): (Typical, 25°C,
single-ended)
4. CMRR (DC to 60Hz, Pseudo-differential)
Input Range Bandwidth (-3dB)
± 10 V 600 kHz
± 2 V 630 kHz
± 1 V 660 kHz
± 200 mV 350 kHz
Input
Range
System Noise SFDR SINAD THD SNR
± 10V 0.3 LSBRMS 108 dB 89 dB 102 dB 89 dB
± 2V 0.1 LSBRMS 98 dB 85 dB 98 dB 85 dB
± 1V 0.4 LSBRMS 94 dB 77 dB 89 dB 77 dB
± 200mV 0.8 LSBRMS 79 dB 67 dB 78 dB 67 dB
Input Range ENOB
± 10V 14.5 bits
± 2V 13.9 bits
± 1V 12.5 bits
± 200mV 10.8 bits
Input Range CMRR
± 10V 90 dB
± 2V 110 dB
± 1V 105 dB
± 200mV 98 dB

Introduction 7
1.4.3 Analog Output
Analog Output (AO)
Number of channels 2
D/A converter DAC8871 or equivalent
Maximum update rage 1M samples
Resolution 16 bits
FIFO size 10k samples, 2-CH sharing
Data transfers Programmed I/O, Continuous (bulk trans.)
Output range ± 10V
Output coupling DC
Output impedance 0.01 (maximum)
Stability Any passive load, up to 1500pF
Power-on state Around 0V, steady-state
Electrical
Offset Error ±0.15 mV (typical)
Gain Error ±0.05% (typical)
Slew rate 20 V/µs
Rise time 0.5 µs
Fall time 0.5 µs
Settle time to 1% output error 2.5 µs
DNL < 1 LSB
INL 1 LSB or less
Output driving: ±5 mA
Power-on glitch 3.4 V for 30 ms

8 Introduction
1.5 Unpacking Checklist
Before unpacking, check the shipping carton for any damage. If
the shipping carton and/or contents are damaged, inform your
dealer immediately. Retain the shipping carton and packing
materials for inspection. Obtain authorization from your dealer
before returning any product to JYTEK. Ensure that the follow-
ing items are included in the package.
USB-61900 Series module
Stand
Two removable screw terminals
USB cable (2-meter length)
Rail mount kits
1.6 Software Support
JYTEK provides comprehensive software drivers and packages to
suit various user approaches to system building. In addition to pro-
gramming libraries, such as DLLs, for most Windows-based sys-
tems, JYTEK also provides drivers for other application
environments such as LabVIEW® and MATLAB®. JYTEK also
provides ActiveX component ware for measurement and
SCADA/HMI, and breakthrough proprietary software. All software
options are on the website:www.jytek.com.
Be sure to install the driver & utility before using the USB-61900
Series module.
1.7 Driver Support for Windows
1.7.1 UD-DASK
UD-DASK is composed of advanced 32/64-bit kernel drivers for
customized DAQ application development. USB-DASK enables
you to perform detailed operations and achieve superior perfor-
mance and reliability from your data acquisition system. DASK
kernel drivers now support Windows 7/Vista® OS.

Introduction 9
1.7.2 DAQPilot
DAQPilot is a SDK with a graphics-driven interface for various
application development environments. DAQPilot represents
JYTEK's commitment to full support of its comprehensive line of
data acquisition products and is designed for the novice to the
most experienced programmer.
As a task-oriented DAQ driver, SDK and wizard for Windows sys-
tems, DAQPilot helps you shorten development time while accel-
erating the learning curve for data acquisition programming.
You can download and install DAQPilot at:
http://www.jytek.com
Please note that only DAQPilot versions 2.3.0.712 and later can
support the USB-61900 Series.
1.8 Utilities for Windows
1.8.1 U-Test
U-Test is a free and ready-to-use utility which can assist instant
testing and operation of all JYTEK USB DAQ series functions with
no programming. In addition to providing data collection and moni-
toring functions, U-Test also supports basic FFT analysis and pro-
vides direct control of analog output and digital I/O with a
user-friendly interface.
You can download and install U-Test at: http://www.jytek.com/

Hardware Information 11
2 Hardware Information
This chapter provides information regarding dimensions, connec-
tion, accessories, and pin assignments for the USB-61900 Series.
2.1 Overview and Dimensions
2.1.1 Module
Figure 2-1: USB-61902 Module Rear View
NOTE:
NOTE:
All dimensions shown are in millimeters (mm)
While model USB-61902 is illustrated as an
example, all dimensions and external features
shown (excepting pin connections) are common
to all USB-61900 Series modules