The Zebra VS20 Machine Vision Smart Sensor is a compact industrial vision sensor for automated quality inspection, assembly validation and production-line error-proofing. It combines integrated imaging, Zebra Aurora setup software and PLC connectivity, with barcode and direct part mark (DPM) reading available through the appropriate licensed configuration.
The VS20 checks visible product features and sends inspection results to a machine controller or host system. Typical applications include confirming that a component is present, checking part orientation and detecting a missing or misplaced label before the next production step.
Within MarvelTech’s machine vision systems range, the VS20 suits focused inspection tasks where a single compact sensor can view the required features. Suitability depends on the smallest detail to be detected, available mounting distance, lighting and required cycle time.
Zebra Aurora provides the environment for configuring image capture, inspection tools and job results. VS20 configurations use Sensor, Standard or Advanced machine vision toolsets, with software licences providing access to additional supported functions.
The Sensor toolset includes object location, pixel counting, brightness, contrast, edge detection and distance between tool results. More demanding inspections require the corresponding toolset, so the quotation should identify the tools needed for your application.
Barcode decoding and text reading should be specified explicitly. Do not assume that a base Sensor configuration includes every decoding or optical character recognition (OCR) function advertised across the VS20 family.
Auto-Tune helps establish suitable image-capture settings. Inspection regions, acceptance criteria and the response to a failed check still need to be configured and tested against representative products.
ImagePerfect captures up to three images during one trigger event, using different capture settings. This provides options for inspecting features that respond differently to focus, exposure or illumination, provided the capture sequence fits the production cycle.
Golden Image Compare supports troubleshooting by comparing a captured image with a reference saved during setup. It helps reveal changes such as lens contamination, lighting variation or camera movement; the configured inspection tools determine whether the product passes or fails.
| Specification | VS20 |
|---|---|
| Image sensor | 1280 × 800 pixels; monochrome CMOS with global shutter |
| Image acquisition | Up to 60 frames per second; completed inspection rate depends on the job and licensed functions |
| Optics | 6.0 mm liquid lens; nominal field of view of 35° horizontal × 26° vertical |
| Integrated illumination | Two 660 nm red LEDs or two 2700 K white LEDs, depending on configuration |
| Connections | One M12 X-coded 10/100/1000 Mbps Ethernet port; one M12 12-pin power, I/O and RS-232 connector |
| Communication protocols | EtherNet/IP, PROFINET, Modbus TCP, TCP/IP and RS-232 |
| Digital I/O | Two opto-isolated inputs and two opto-isolated outputs |
| Power | 10–30 V DC; maximum 7.5 W at 24 V DC; alternatively, Class 2 Power over Ethernet |
| Dimensions | 28.3 × 54.6 × 94.2 mm, height × width × depth |
| Housing and sealing | Aluminium housing; IP65 and IP67 |
| Operating temperature | 0–45°C with external DC power; 0–40°C with PoE, subject to duty cycle |
Choose the illumination and mounting position using actual product samples. A feature that is visible on a stationary sample may become difficult to inspect when motion, reflections or normal product variation are introduced.
With the appropriate toolset and decoder licence, the VS20 supports 1D and 2D barcode capture and DPM reading using Zebra’s PRZM Intelligent Imaging technology. DPM refers to codes marked directly onto a component rather than printed on an attached label.
Reading performance depends on code size, marking quality, surface finish, working distance and lighting. Include representative codes and the required capture rate when specifying the device, particularly for small marks on reflective or curved parts.
If identification is the entire task, a fixed barcode scanner may be a more appropriate starting point. The VS20 becomes relevant when the same station also needs image-based inspection.
The VS20 connects to a programmable logic controller (PLC) or host system through its supported industrial protocols, serial interface or digital I/O. Inputs can trigger image capture, while outputs communicate configured inspection results to the machine controls.
The four I/O connections comprise two inputs and two outputs. Account for that allocation when planning triggers, pass/fail signals and external devices. Reject mechanisms require suitable control hardware, electrical interfaces and timing within the machine.
Power over Ethernet supplies power and network communication through one Ethernet cable when compatible PoE infrastructure is available. External DC power provides another installation option. Specify the required cables, mounting bracket and power equipment alongside the sensor.
A component arrives in a repeatable position beneath the VS20. An input triggers capture, and the configured inspection checks whether a required feature is present and correctly positioned. The sensor sends the result to the PLC, which determines whether the component proceeds or is diverted.
Commissioning should include acceptable parts, known defects and normal variation in position and appearance. Test the complete sequence at production speed, including the time needed to capture images, process the inspection, communicate the result and operate the downstream mechanism.
The VS20 suits compact installations with focused inspection requirements. Consider the Zebra VS40 Machine Vision Smart Camera when the application needs greater image detail, more capture settings or additional connection options.
| Requirement | VS20 | VS40 |
|---|---|---|
| Resolution and shutter | 1280 × 800; monochrome global shutter | 1920 × 1200 global shutter or 2592 × 1952 rolling shutter; monochrome, depending on model |
| Maximum image acquisition rate | 60 frames per second | 60 frames per second for 2.3 MP; 30 frames per second for 5.1 MP |
| Images per trigger | ImagePerfect: up to three | ImagePerfect+: up to sixteen |
| Ethernet connections | One port | One- or two-port configurations |
| Illumination | Integrated red or white LEDs | Field-replaceable lighting modules with additional wavelength options |
These are image-acquisition specifications, not completed inspection rates. Compare both devices using equivalent fields of view, exposure conditions and inspection tasks. The VS40’s higher-resolution rolling-shutter option also requires assessment of motion during capture.
A monochrome sensor is not the appropriate choice when acceptance depends on distinguishing colours that appear similar in grayscale. Inspections requiring multiple viewpoints or detail beyond the available resolution may justify a different camera or a multi-camera system.
A licence can enable supported inspection or decoding functions. It does not change the sensor’s resolution, physical connections or installed illumination. Review both software capability and hardware limits before planning an upgrade.
Define which images must be retained, their destination and how they should be associated with products or batches. Image storage, retention rules and access controls need to be included in the integration scope if records are required for quality review or traceability.
MarvelTech supplies machine vision and automatic identification equipment and provides industrial automation, equipment maintenance and support services. For a VS20 enquiry, describe the inspection outcome and the existing machine controls so the proposed configuration can be assessed against the application.
The quotation should identify the sensor configuration, inspection and decoder licences, mounting hardware, cables and power equipment. Include any required installation, configuration, training and ongoing support in the requested scope, and ask for confirmation of availability, lead time and applicable warranty terms.
Send MarvelTech the following information where available:
Use the enquiry form to request a VS20 quotation and an assessment of the configuration needed for your inspection task.
The Zebra VS20 suits focused checks such as component presence, part orientation and label placement where the relevant features are visible from one viewpoint. Selection depends on whether acceptable and defective parts produce distinguishable images at production speed. Its monochrome sensor measures differences in brightness, so it is unsuitable for colour identification when the colours appear similar in greyscale.
The smallest feature must occupy enough pixels to distinguish it consistently. The VS20 has a 1280 × 800-pixel sensor and a 6.0 mm liquid lens. Increasing working distance generally covers a larger area but reduces the pixels available across each feature. Adjustable focus sharpens the image; it does not increase resolution. Specify the inspection area, smallest defect and available mounting distance together.
Consider the Zebra VS40 Machine Vision Smart Camera when you need higher resolution, more lighting options or additional connections. Its 2.3 MP global-shutter and 5.1 MP rolling-shutter models offer different trade-offs for moving products. The VS40 also supports up to sixteen capture settings per trigger, compared with three on the VS20. Compare image detail and motion behaviour at the required field of view.
Zebra Aurora Focus configures image capture, inspection tools and result communication. Available functions depend on the device’s installed toolset and licences; access to the setup software does not establish entitlement to every tool. Specify pattern matching, measurement and optical character recognition (OCR), which reads text, before ordering. Supported licence upgrades can extend functionality, while resolution, connectors and installed illumination remain hardware constraints.
Yes, with an inspection job and licensed decoding capability suited to both tasks. Direct part marks (DPM) are codes formed on the component itself, where surface finish and lighting can make reading harder than on printed labels. Test representative marks alongside the inspection features. If identification is the only requirement, compare stationary industrial barcode scanners before specifying a vision sensor.
ImagePerfect captures up to three images from one trigger, with separate settings such as focus, exposure, gain and illumination control. This can help when different features need different capture conditions. Reflections that obscure a feature still require suitable lighting geometry or repositioning. Evaluate the red- or white-light configuration using actual surfaces, including normal variation in finish and orientation.
No. Up to 60 frames per second describes image acquisition, while completed inspection throughput depends on exposure, images per trigger, processing tools, decoder licence and result communication. Multiple captures also need to fit within the time the part remains visible. Validate the complete inspection at production speed, including the deadline for the machine controller to act on its result.
The VS20 supports EtherNet/IP, PROFINET, Modbus TCP, TCP/IP and RS-232, alongside two opto-isolated inputs and two opto-isolated outputs. These are a defined input/output allocation, not four interchangeable connections. Agree the trigger source, result format and signal timing with the PLC programmer. A reject mechanism also needs suitable machine controls and electrical interfaces to act on the inspection result.
Specify either a compatible Power over Ethernet configuration and network supply or an external 10–30 V DC supply. Include a suitable mounting bracket, M12 Ethernet cable and the power/I/O cable required by the installation. PoE combines network communication and power on one cable, but separate wiring may still be needed for a physical trigger or digital pass/fail outputs.
The VS20 is rated IP65 and IP67, with operating temperatures of 0–45°C using external DC power or 0–40°C using PoE, subject to duty cycle. Assess temperature at the mounting position during sustained operation. Sealing does not establish compatibility with every cleaning chemical or washdown process; specify those conditions separately. Keep the optical window accessible for cleaning and inspection.
Auto-Tune helps establish image-capture settings; the inspection regions, pass/fail thresholds and machine response still need configuration. Commission the job using acceptable parts, known defects and normal positioning variation. Save a reference image for Golden Image Compare so later lighting changes, contamination or camera movement can be investigated before changing acceptance thresholds and potentially admitting defective parts.
Send representative good and defective samples or photographs, the smallest feature to detect, inspection area, mounting distance and required cycle time. Include barcode samples, PLC model, communication protocol, power preference and environmental conditions. Request an itemised configuration covering licences, cables and mounting hardware. If commissioning or ongoing support is required, include it in the scope when discussing Marveltech’s industrial automation services.
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