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QSB Quadrature to USB Adapter

CE Marking: Starting July 22nd, 2014, some US Digital� products will contain the CE Marking. The QSB will not contain a CE Marking and will not be available for shipping to CE Mark required countries (for example, all countries within the European Union (EU)) after July 10th, 2014. See the Product Change Notification PCN 4464 for more information, or contact a US Digital� representative at sales@usdigital.com.

Material Compliance Statement: This product does NOT contain banned levels of substances as defined in European Directive 2011/65/EU specifically, Lead (Pb), Mercury (Hg), Cadmium (Cd), Hexavalent Chromium (CR+6), Poly Brominated Biphenyls (PBB), and Poly Brominated Diphenyl Ethers (PBDE) are not found above the threshold level given in the 2011/65/EU Directive.
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Overview

  • Low cost
  • Easy to use USB serial port interface
  • USB port powered
  • Field upgradable software
  • Reads Quadrature, PWM and Analog encoders
  • Reads quadrature count rate up to 6 MHz
  • Motor Step/Direction control outputs
  • Four analog and four digital I/O pins
  • RoHS compliant

The QSB is a low cost USB data acquisition device that can count quadrature and index signals from an incremental encoder, provide digital I/O, perform A/D conversion or act as a stepper/motor controller. There are...

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Product Specifications

 

ParameterMin.Max.Units
Operating Temperature 0 70 C

Parameter

Min.

Typ.

Max.

Units

Supply Voltage (1) 4.75   5.00 5.25 
Supply Current (QSB device only)    52   mA 
Supply Current (External devices) (2) 450 mA

(1) Voltage is regulated by USB port

(2) USB port capable of supplying 500mA maximum

 

QSB-S Pinout

5-pinB_2.gif

Pin5-Pin Connector
1 Ground
2 Index
3 A Channel or EAN0 or PWM0
4 +5 Volts
5 B Channel
 Notes:

  • Pin 3 EAN0 is an A/D input designed for the MAE3-A10 and MA3-A10 analog output encoders. It can be used as a generic 10-bit A/D input (0-5V range).
  • Pin 3 PWM0 is a pulse width modulation input designed for the 10 or 12 bit PWM output of the MA3/MAE3 encoders.

QSB-D, QSB-M Pinout

Enc10-pinB_2.gif

Pin10-pin
Connector
QSB-D
10-pin
Connector
QSB-M
1 Digital I/O
Channel 0
Digital I/O
Channel 0
2 Ground Ground
3 Index- Digital I/O
Channel 1 or
Motor Step
4 Index+  Index
5 A- Digital I/O
Channel 2 or
Motor Direction
6 A+ or EAN0 or PWM0 A or EAN0 or PWM0
7 +5 Volts +5 Volts
8 No connection +5 Volts
9 B- Digital I/O
Channel 3
10 B+  B

 

 Notes:

  • Pin 6 EAN0 is an A/D input designed for the MAE3-A10 and MA3-A10 analog output encoders. It can be used as a generic 10-bit A/D input (0-5V range).
  • Pin 6 PWM0 is a pulse width modulation input designed for the 10 or 12 bit PWM output of the MA3/MAE3 encoders.

 

Parameter

Min.

Typ.

Max.

Units

Quadurature Encoder Input Frequency    MHz
PWM Encoder Input Frequency (1) 250    1000  Hz 

Encoder Single-Ended Interface

  Low Input

  High Input

 

-0.5

2.8

 

 

 

 

2.1

5.5

 

V

V

Encoder Differental Interface

  Differential Voltage

  Common Mode Voltage

  Input Voltage Range 

 

200

0.0

-0.5

 

 

 

 

 

5.0

5.5

 

mV

V

V

Analog Encoder Input

  Voltage Range

  DC Input resistance

  Bandwidth

 

0

4.8

0

 

 

6.3

 

 

5

9.0

3000

 

V

kOhm

Hz

(1): The PWM mode is designed specifically to operate with US Digital's MA3/MAE3.

 

 

Parameter

Min.

Typ.

Max.

Units

Digital Input Voltage 0 5 24.5 V
Positive-going Input Voltage Threshold  (Vin+) 1.5   2.5 V
Negative-going  Input Voltage Threshold (Vin-) 0.83   1.82 V
Input Voltage Hysteresis (Vin+ - Vin-) 0.33   1.1 V
Digital High Output Voltage (Note 1) 4.5 4.7 5.0 V
Digital Low Output Voltage (Note 1) 0 0   V

Note 1: Output can be externally pulled up to 24V. Open drain MOSFET pulldown capabile of 1.0 A max. continuous current. See digital output port circuits below. When driving inductive loads, add an external diode to protect the QSB from damage caused by large voltage transients.

 

Digital Input Port Circuit:

inputports2_0.gif

 

Digital Output Port Circuit:

outputports2_0.gif

 

The speed and direction of a single stepper motor can be controlled using the QSB-M in conjunction with a stepper motor driver, such as the US Digital MD2S. Two of the four digital I/O port pins can be configured to have motor step/direction functionality or normal digital I/O.

See the QSB Command List document for detailed information on the QSB's motor control commands.

See the QSB Command List document for detailed information on the commands.

The QSB firmware can be easily upgraded using the "QSB Firmware Updater" program that is available on the QSB Software page. There may be periodic upgrades to the QSB firmware that can be loaded as needed by a customer.  The firmware upgrades typically take less than 30 seconds.

Title Date Description Download
PCN 4464 - CE - RoHS 6/30/2014

US Digital is aware of the increasing attention to world-wide environmental regulations, specifically with regard to the need for hazardous substance restrictions in electronic components and systems. As of July 10th, 2014 US Digital will now be CE Marking certain products inline with compliance under RoHS Directive (2011/65/EU). In order to achieve RoHS Compliance, the products will not contain more than the acceptable levels of the listed restricted substances within the RoHS 2011/65/EU directive.

Part Numbers Affected:

  • ED3
  • USB4
  • QSB
  • SEI-USB
  • MD2S
  • PS-5, PS-12, PS-24, PS-48 (Power Supplies)
  • PE

For the part numbers listed above, US Digital cannot confirm that they meet Low-Voltage and EMC Directives and for that reason US Digital cannot support shipping those products / product families into the CE required countries (For Example countries in the EU). Those products can still be shipped to Non-CE required countries with a Statement of Material Conformance to the RoHS Directive 2011/65/EU, in place of a RoHS Compliance Declaration.

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Product Description

Restriction of Hazardous Substances

The QSB is a low cost USB data acquisition device that can count quadrature and index signals from an incremental encoder, provide digital I/O, perform A/D conversion or act as a stepper/motor controller. There are 3 variants that provide a mix of different features.   

  • QSB-S - One single-ended quadrature, PWM or Analog encoder interface
  • QSB-M - One single-ended quadrature, PWM or Analog encoder interface; 4-bits of digital I/O or 2-bits of digital I/O and 1 channel stepper motor control (step/direction) 
  • QSB-D - One differential quadrature encoder interface and 1-bit of digital I/O

The QSB is USB bus powered and is packaged in a slim, compact package that it easy to install. US Digital provides the software, examples and documentation needed to use the QSB. The QSB appears as a COM serial port to the PC, so any application that can read/write the COM port can be used to control the QSB.

Product Notes
  • Cables and connectors are not included and must be ordered separately.
  • US Digital® warrants its products against defects in materials and workmanship for two years. See complete warranty for details.

Cable/connector assembly not included and must be ordered separately.

Related Products & Accessories

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Quantity Unit Price
1 $81.65
5 $56.95
10 $46.50
50 $42.25
Over 50 Call for Quote
Quantity
Unit Price

$81.65

Subtotal

$81.65


For purchasing or volume discounts, please use the above part number and contact us at:

sales@usdigital.com or

800.736.0194 (Toll Free)
360.260.2468 (Local)