DS900 Series
Displacement Sensors
Reference
02/21/2018
Version: 9.3.0.5
Legal Notices
The software described in this document is furnished under license, and may be used or copied only in accordance with
the terms of such license and with the inclusion of the copyright notice shown on this page. Neither the software, this
document, nor any copies thereof may be provided to, or otherwise made available to, anyone other than the licensee.
Title to, and ownership of, this software remains with Cognex Corporation or its licensor. Cognex Corporation assumes
no responsibility for the use or reliability of its software on equipment that is not supplied by Cognex Corporation.
Cognex Corporation makes no warranties, either express or implied, regarding the described software, its
merchantability, non-infringement or its fitness for any particular purpose.
The information in this document is subject to change without notice and should not be construed as a commitment by
Cognex Corporation. Cognex Corporation is not responsible for any errors that may be present in either this document or
the associated software.
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may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, nor
transferred to any other media or language without the written permission of Cognex Corporation.
02/21/2018 2:55 PM
Version: 9.3.0.5
Copyright © 2015. Cognex Corporation. All Rights Reserved.
Portions of the hardware and software provided by Cognex may be covered by one or more U.S. and foreign patents, as
well as pending U.S. and foreign patents listed on the Cognex web site at: http://www.cognex.com/patents.
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Cognex, 2DMAX, Advantage, AlignPlus, Assemblyplus, CheckitwithChecker, Checker, CognexVisionforIndustry,
CognexVSOC, CVL, DataMan, DisplayInspect, DVT, EasyBuilder, Hotbars, IDMax, In-Sight, LaserKiller, MVS-8000,
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Other product and company trademarks identified herein are the trademarks of their respective owners.
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Legal Notices
Preface
This document describes the Cognex Displacement Sensors DS900 series.
Symbols
The following symbols indicate safety precautions and supplemental information.
WARNING: This symbol indicates the presence of a hazard that could result in death, serious personal injury or
electrical shock.
CAUTION: This symbol indicates the presence of a hazard that could result in property damage.
Note: Notes provide supplemental information about a subject.
Tip: Tips provide helpful suggestions and shortcuts that may not otherwise be apparent.
3
Preface
Precautions
Observe these precautions when installing the Cognex product, to reduce the risk of injury or equipment damage:
l To reduce the risk of damage or malfunction due to over-voltage, line noise, electrostatic discharge (ESD), power
surges, or other irregularities in the power supply, route all cables and wires away from high-voltage power
sources.
l Changes or modifications not expressly approved by the party responsible for regulatory compliance could void
the user’s authority to operate the equipment.
l Cable shielding can be degraded or cables can be damaged or wear out more quickly if a service loop or bend
radius is tighter than 10X the cable diameter. The bend radius must begin at least six inches from the connector.
l This device is a business-use (Class A) EMC-compliant device. The seller and user are advised to be aware of
this fact. This device is intended for use in areas outside the home.
l This device should be used in accordance with the instructions in this manual.
l All specifications are for reference purpose only and may be changed without notice.
Laser Models
The following sensors contain a class 2M laser:
Model Class 2M Laser
DS910B (820-9166-1R)
DS925B (820-9164-1R)
√
Laser Safety Warnings
LASER LIGHT, DO NOT STARE INTO BEAM: CLASS 2M LASER PRODUCT
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY CAUSE SERIOUS INJURY
Cognex places the following labels on every 3D displacement sensor:
DS925B
DS910B
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Precautions
Label Locations
DS925B (820-9164-1R)
DS910B (820-9166-1R)
All DS900 Series Sensors
LASER LIGHT, DO NOT STARE INTO BEAM: CLASS 2M LASER PRODUCT
Label Location
1 - Laser window
AVOID EXPOSURE - LASER RADIATION IS EMITTED FROM THIS
APERTURE
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Precautions
Warnings and Notices
Cognex provides the following warnings and notices:
l Do not stare into the beam.
l Do not view directly with optical instruments (magnifiers).
l Do not place optical components (mirrors) into the beam.
l Design test fixtures in such a way that unintentional viewing of the beam is prevented.
l Switch off the laser when not in use.
l Avoid the use of highly reflective materials. If you cannot, try to angle the part so unintentional viewing of the
reflection is prevented.
l Terminate (block) unused beams.
l Keep the laser plane horizontal or pointing downwards.
l Report any issues that may have an impact on laser safety to your supervisor or Laser Safety Officer.
l There is no scheduled maintenance necessary to keep the product in compliance.
l Under no circumstances should you operate the sensor if it is defective or the seal damaged. Cognex
Corporation cannot be held responsible for any harm caused by operating a faulty unit.
l Under no circumstances should you modify in any way the sensor or its housing.
l Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
l When moving the unit from a very hot environment to a cold environment please allow the unit to equalize in a
room temperature environment for 2 hours between temperature extremes.
If you need more information on the collection, reuse, and recycling systems, please contact your local or regional waste
administration. You may also contact your supplier for more information on the environmental performance of this
product.
Product Service
l Bring any performance issues to the attention of your Cognex sales representative.
l The sensor can only be serviced by a trained Cognex representative. Return the unit to
Cognex for any service or repairs.
l Do not operate the sensor if the enclosure appears damaged.
Safely Handling
l Retain the original packaging supplied by Cognex and re-use it whenever you ship your sensor.
l Follow the instructions in Sensor Maintenance on page9 for details on cleaning the sensor.
l Always observe the environmental limits. Subjecting the unit to shock, vibration or rough handling in excess of
the specified limits can cause the sensor to fail.
l Do not store or install your sensor in excessively hot, cold, dusty, or damp environments.
l For laser safety information, see Laser Models on page4.
l For electrical safety information, see Power Supply on page21.
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Precautions
Cognex 3D Displacement Sensors
Cognex 3D displacement sensors combine GigE Vision and laser-stripe illumination to generate information about
three-dimensional objects that cannot easily be generated by cameras that acquire two-dimensional images. The sensor
offers highly accurate physical object measurements by analyzing the shape of the laser stripe as it appears to the
camera (which is positioned at an angle to the laser).
The image of the laser stripe represents a cross-section of the object under inspection. Your application might use this
cross-section data, or you can use a 3D displacement sensor to acquire a series of images while the object moves past
and then combine the height data of each image to generate a synthetic 2D image containing height profile information
in real-world coordinates.
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Cognex 3D Displacement Sensors
Accessories
The following optional components can be purchased separately. For a complete list of options and accessories, contact
your Cognex sales representative.
Ethernet Cables
Note: This cable is not compatible with the DS1000 series.
Length Description Part Number
5m M12 to RJ-45, straight CCB-2901858-05
Multifunction Cable
For more information, refer to Multifunction Port on page23 for the pin-out of the unterminated flying leads.
Note: This cable is required if PoE is not used to power the sensor.
Length Description Part Number
5m Cable Power, I/O, and Encoder, M12 to flying lead,
straight
CCB-2901868-05
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Accessories
Sensor Maintenance
The windows to the camera and laser must be kept clean and free of defects to ensure proper operation. Any scratches,
dust or dirt will impact the accuracy of acquired images.
CAUTION: Use care not to damage the anti-reflective coating on the windows.
Cognex makes the following recommendations for cleaning the laser and camera windows:
l Unplug the unit so the laser cannot be enabled.
l Use lint-free tissue or an optical grade cotton swab ("Q-tip").
l Use reagent-grade isopropyl alcohol.
l Use minimal pressure.
l Use several tissues or swabs.
l Start at the center of each window and spiral out to the edges.
l Rotate the tissue or swab during cleaning so dirt is not dragged across the surface.
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Sensor Maintenance
System Layout
Component Description
1 Ethernet socket
2
Multifunction socket (24V DC power + I/O connector)
3
M5 threaded mounting holes
4
This pin hole is provided for a position locking pin. The sensor can be mounted
reproducible and replaceable together with an attachment point.
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System Layout
Bottom View
Component Description
1
Laser window
CAUTION: AVOID EXPOSURE - LASER RADIATION IS
EMITTED FROM THIS APERTURE
2 Camera window
System LEDs
Component Description
Laser On Indicates the laser is on.
State Solid green Measuring
Green flashing
Data transmission:
l Long flashes for data transmission.
l Short for access to vision controller.
Red flashing Error code.
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System Layout
DS910B Sensor Specifications
Specification DS910B
Weight 440 g
Dimensions 118.5 mm (H) x 33 mm (W) x 85 mm (L)
Operating Temperature 0ºC to 45ºC (32ºF to 113ºF)
Storage Temperature -20ºC to 70ºC (-4ºF to 158ºF)
Maximum Humidity 5% - 95% (non-condensing)
Environmental IP65 (with Cognex recommended IP65 Ethernet and Power and I/O cables)
Laser Power 7mW (class 2M) at 405nm wavelength
Power Supply Requirements
Voltage: +24 VDC (11-30 VDC)
Current: 500 mA max
IEEE 802.3af Power over Ethernet
Discrete I/O Operating Limits Trigger
Input voltage limits: 0 VDC to +30 VDC
Input ON: > 2.4 VDC (TTL); > 11 VDC (HTL)
Input OFF: < 0.8 VDC (TTL); < 3 VDC (HTL)
Encoder Input Specification
Single -ended: A+/B+: 5-24V; A-/B-: +0VDC
Scan Rate Up to 1.2 kHz
Ethernet
l Gigabit Ethernet interface
l Standard M12-8 female connector
Certifications
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DS910B Sensor Specifications
DS910B Series Technical Data
Data DS910B
Measuring Range Z-axis 8 mm
Start of Measuring Range 52.5 mm
End of Measuring Range 60.5 mm
Line Length Midrange (X-
axis)
10 mm
Linearity
1
± 0.17 % FSO (3 σ)
Resolution X-axis 1280 points/profile
Light Source Laser Semiconductor laser, approx. 405 nm, 10° aperture angle, Laser class 2M: laser power
7 mW, reduced 2 mW
Displays 1x state / 1x laser on
Electromagnetic
Compatibility (EMC)
According to: EN 61326-1: 2006-10
DIN EN 55011: 2007-11 (Group 1, Class B)
EN 61000-6-2: 2006-03
FSO = Full Scale Output | MMR = Midrange
1
Based on a Cognex Optronic standard target with metallicfinished surfaces.
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DS910B Series Technical Data
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