The Basler ace 2 a2A4504-27g5mBAS is a high-resolution industrial area scan camera built on the 1.1" Sony IMX541 progressive-scan CMOS global-shutter sensor, providing 4504 x 4504 pixels (20.2 MP) at a 2.74 µm pixel size. It connects over a 5GigE (NBASE-T) interface via an RJ-45 jack and runs at roughly 26.4 fps in default mode, up to ~28.5 fps in Performance mode. The camera supports 8/10/12-bit pixel formats, a 70.8 dB dynamic range, and complies with GigE Vision and GenICam standards. It uses a C-mount, is powered by 12–24 VDC through its M8 I/O connector at about 5.8 W, and carries an IP30 rating.
Brand
Basler
Camera type
Area scan
Interface
5GigE (NBASE-T, 100/1000/2500/5000 Mbit/s)
Resolution
20.2 MP
Horizontal resolution
4504 x 4504 px
Mono / color
Monochrome
Sensor manufacturer
Sony (IMX541)
Sensor model
Sony IMX541-AAMJ-C CMOS
Shutter
Global shutter
FPS
27 fps (26.4 fps default, up to 28.5 fps Performance mode)
The Basler ace 2 a2A4504-27g5mBAS is built around the 1.1-inch Sony IMX541 monochrome CMOS sensor, a global-shutter device that delivers a square 4504 x 4504 pixel image (20.2 MP) at a 2.74 um pixel size. The square format is the practical headline here: with the same number of pixels along both axes, the camera images a square field without the wasted sensor area you get when fitting a square part onto a 16:9 or 4:3 frame, which is why it suits flat panels, wafers, printed sheets and PCBs. The global shutter exposes every pixel simultaneously, so fast-moving or indexed parts are captured without the skew and smear a rolling shutter would introduce. At 20.2 MP, a single 2.74 um pixel resolves very fine detail across a wide field, letting one camera cover an area that would otherwise need several lower-resolution sensors tiled together.
Connectivity is over 5GigE (NBASE-T) on a standard RJ-45 jack, auto-negotiating 100/1000/2500/5000 Mbit/s, and the camera conforms to GigE Vision and GenICam so it drops into any compliant acquisition stack. The 5GigE link is what makes the full 20.2 MP frame usable at speed: the camera runs around 26.4 fps in default mode and up to about 28.5 fps in Performance mode, sustaining roughly 27 fps of full-resolution monochrome data over a single Ethernet connection. Pixel formats of 8, 10 and 12 bits and a 70.8 dB dynamic range give headroom for high-contrast scenes and for the bit depth that gauging and grading algorithms benefit from. Power and triggering arrive on the M8 I/O connector, which keeps the wiring tidy for distributed inspection cells where the PC sits away from the line.
For an installer, the camera is a passive imaging head that depends on its optics, lighting and trigger to perform. It uses a C-mount, and because the 1.1-inch sensor measures 12.3 x 12.3 mm across a square format, the lens must cover that full image circle and resolve the 2.74 um pixel, so a high-resolution C-mount lens rated for the format and the megapixel count is required to avoid throwing away sensor sharpness. Being monochrome, it pairs with controlled, often strobed illumination and benefits from wavelength selection and filtering to maximize contrast on the feature of interest. The M8 I/O connector supplies 12-24 VDC power (about 5.8 W) and carries the trigger and output lines for hardware-synchronized capture with a strobe and an encoder or part-present sensor. The compact 62.2 x 29 x 29 mm, 105 g body, IP30 rating and -10 to 50 C operating range fit it for enclosed inspection stations rather than washdown or harsh outdoor environments.
Best for
High-resolution surface and defect inspection of flat, square-format parts such as PCBs, display panels and printed sheets where one 20.2 MP frame replaces multiple tiled cameras
Semiconductor and electronics inspection where the global shutter and fine 2.74 um pixel capture sharp detail on indexed or moving wafers and assemblies
Dimensional measurement and gauging that need many pixels across a wide square field and the extra bit depth of 10/12-bit output
Industrial OCR/OCV and traceability code reading on printed or marked surfaces, using the monochrome sensor with task-specific lighting
Distributed inspection cells that benefit from a 5GigE Ethernet link back to a remote PC running standard GigE Vision software
Selection notes
Specify a C-mount lens that covers the full 1.1-inch (12.3 x 12.3 mm) square image circle and resolves the 2.74 um pixel; a lens rated for lower resolution or a smaller sensor format will limit effective sharpness regardless of the 20.2 MP count
Confirm the host has a 5GigE-capable NIC (NBASE-T) to sustain full-resolution frames near 27 fps; on slower links the interface auto-negotiates down to 100/1000/2500 Mbit/s and throughput drops accordingly
The camera is monochrome, so plan controlled illumination and any optical filtering for contrast; color discrimination is not available and must be handled with wavelength choice and lighting geometry
Budget around 5.8 W and 12-24 VDC supplied through the M8 I/O connector, which also carries trigger in and outputs for hardware-synchronized strobe and part-present signaling
Check environmental fit: IP30 and a -10 to 50 C range suit enclosed cabinets and inspection stations, not washdown, dusty or wide-temperature installations; allow for the compact 62.2 x 29 x 29 mm, 105 g head when designing mounts and heat dissipation
Specifications: General
Brand
Basler
Camera type
Area scan
Specifications: Sensor
Resolution
20.2 MP
Horizontal resolution
4504 x 4504 px
Mono / color
Monochrome
Sensor manufacturer
Sony (IMX541)
Sensor model
Sony IMX541-AAMJ-C CMOS
Shutter
Global shutter
Sensor size
1.1" (12.3 x 12.3 mm)
Pixel size
2.74 x 2.74 µm
Specifications: Performance
FPS
27 fps (26.4 fps default, up to 28.5 fps Performance mode)
Specifications: Interface
Interface
5GigE (NBASE-T, 100/1000/2500/5000 Mbit/s)
Protocols
GigE Vision, GenICam
Specifications: Optics
Mount
C-mount
Specifications: Electrical
Power
12–24 VDC via M8 I/O connector
Power consumption
5.8 W
Specifications: Environment
IP rating
IP30
Operating temperature
-10 to 50 °C
Specifications: Mechanical
Dimensions
62.2 x 29 x 29 mm
Weight
105 g
Applications this camera is commonly selected for. Open one to see the full recommended hardware and approach.
Matched automatically by: lens mount fits the camera mount · lens image circle covers the camera sensor — this camera: C-mount · 1.1" (12.3 x 12.3 mm) sensor.
By category
All 67C-mount lenses 43Telecentric lenses 24
By brand
All 67Basler 34iRAYPLE 23Omron / Sentech 8Datalogic / Datasensing 2
Get a first image quickly with the pylon Viewer, then move into the pylon SDK for your application. These cameras are GenICam/GenTL-compliant, so any compliant vision software can drive them as well.
Download and install the pylon Camera Software Suite for your OS from Basler. This provides the pylon Viewer, the GenTL transport-layer producers and the pylon SDK (C/C++/.NET/Python). On Windows the installer adds the needed drivers; on Linux follow the included setup notes for USB and network permissions.
2. Connect the camera and check the link
Cable the camera to its matching interface: GigE Vision to a GigE port (use a quality cable and, ideally, a dedicated NIC with jumbo frames enabled), USB3 Vision to a USB 3.x port with the supplied cable, or CoaXPress to the frame grabber. Provide power where required (PoE, USB bus power, or PoCXP). Open the pylon Viewer and confirm the camera appears in the device list; for GigE, make sure the camera and NIC are on the same subnet.
3. Grab a first image and set exposure, gain and pixel format
Select the camera in the pylon Viewer and start a continuous grab. Adjust exposure time and gain until the image is well exposed (avoid clipped highlights), set the pixel format (e.g. Mono8 or a Bayer/RGB format), and focus the lens. Use a test pattern if the lens or scene is not ready yet.
4. Configure triggering and acquisition
Decide between free-run and triggered acquisition. For synchronized capture, set the trigger source (software or a hardware line on the I/O connector), trigger mode and any debounce or exposure mode, then verify timing. Note the parameter names you change in the Viewer feature tree, as you will reuse them in code.
5. Move to the SDK or a GenICam-compliant library
Recreate your settings in code with the pylon SDK (C, C++, .NET or Python) to open the device, apply the same features and pull frames into your pipeline; pylon vTools and pylon AI can add processing blocks. Because the cameras are GenICam/GenTL standard, third-party vision libraries work too. Once the image stream is stable, you can route frames to a deep-learning inspection such as Rosepetal for automated defect detection.
Frequently asked questions
It uses the 1.1-inch Sony IMX541 monochrome CMOS global-shutter sensor, delivering 4504 x 4504 pixels (20.2 MP) in a square format with a 2.74 um pixel size.
The camera connects over 5GigE (NBASE-T) through an RJ-45 jack, auto-negotiating 100/1000/2500/5000 Mbit/s, and conforms to GigE Vision and GenICam, so it integrates with any compliant acquisition software.
It delivers roughly 27 fps of full 20.2 MP monochrome frames: about 26.4 fps in default mode and up to about 28.5 fps in Performance mode, sustained over the 5GigE link.
It is a global-shutter sensor, so all pixels are exposed simultaneously for clean capture of moving parts, and it is monochrome, which pairs best with controlled, wavelength-specific lighting and filtering.
It has a C-mount and is powered by 12-24 VDC through its M8 I/O connector at about 5.8 W. The body is 62.2 x 29 x 29 mm, weighs 105 g, carries an IP30 rating and operates from -10 to 50 C.
