MDR26 vs SDR26 Camera Link Cables: Connector Differences and Cable Selection Guide
A practical guide to MDR26, SDR26 and mixed MDR-to-SDR Camera Link cable assemblies for industrial cameras, frame grabbers and machine vision systems.
Quick reference: MDR26 and SDR26 both use 26 contacts in Camera Link applications, but they are different physical connector formats. Select the cable according to the interfaces installed on both the industrial camera and the frame grabber: MDR26-to-MDR26, SDR26-to-SDR26 or MDR26-to-SDR26.
26 pins does not mean the connectors are interchangeable: MDR26 and SDR26 have different connector dimensions and mating interfaces. When the camera and frame grabber use different connector formats, a correctly configured MDR26-to-SDR26 Camera Link cable is required.
Contents
1. What Is a Camera Link Cable?
A Camera Link cable provides the physical connection between a compatible industrial camera and frame grabber. In machine vision systems, it carries the high-speed digital imaging and control signals required for image acquisition and communication between the two devices.
Two 26-pin connector formats are commonly encountered in Camera Link hardware: MDR26 and SDR26. Because both use 26 contacts, buyers sometimes assume that the cables are interchangeable. The connector dimensions and mating interfaces, however, are different.
The most reliable way to select a replacement or new Camera Link cable is therefore to identify the connector on the camera first, identify the connector on the frame grabber second, and then select the cable configuration that matches both ends.
2. What Is an MDR26 Camera Link Cable?
MDR26 is a 26-position Mini Delta Ribbon connector format widely used on traditional Camera Link cameras, frame grabbers and machine vision equipment. Compared with SDR26, the connector body is larger and uses a wider contact pitch.
An MDR26-to-MDR26 Camera Link cable is used when both devices have MDR26 interfaces. This remains a common configuration in established inspection systems, industrial imaging equipment, laboratory systems and Camera Link installations built around conventional MDR hardware.
Typical configuration: MDR26 camera → MDR26 Camera Link cable → MDR26 frame grabber.
3. What Is an SDR26 Mini Camera Link Cable?
SDR26 is a 26-position Shrunk Delta Ribbon connector format commonly associated with Mini Camera Link equipment. Its compact 0.8 mm pitch interface reduces the connector footprint and is particularly useful on industrial cameras where rear-panel space is limited.
An SDR26-to-SDR26 cable is used when both the camera and frame grabber are equipped with SDR26 interfaces. This configuration is common in compact machine vision installations where reducing connector size is more important than retaining the larger traditional MDR format.
Compact does not automatically mean faster: SDR26 mainly provides a smaller physical interface. Camera Link performance also depends on the camera, frame grabber, cable construction, configuration and cable length.
4. MDR26 vs SDR26: What Are the Main Differences?
The most important distinction is physical format. MDR26 and SDR26 may both appear on Camera Link equipment and both have 26 contacts, but they do not use the same mating dimensions.
| Feature | MDR26 | SDR26 |
|---|---|---|
| Contacts | 26 | 26 |
| Connector Family | Mini Delta Ribbon | Shrunk Delta Ribbon |
| Typical Pitch | 1.27 mm / 0.050 inch | 0.8 mm |
| Physical Size | Larger | More compact |
| Typical Camera Link Description | Traditional / standard-size interface | Mini Camera Link interface |
| Industrial Camera Use | Yes | Yes |
| Frame Grabber Use | Yes | Yes |
| Direct MDR/SDR Mating | No | No |
Compatibility rule: Do not identify a Camera Link cable only by the words "26 pin." Confirm whether each equipment interface is MDR26 or SDR26 before ordering.
5. The Three Common Camera Link Cable Configurations
Once the camera-side and frame-grabber-side connectors are known, the cable configuration becomes straightforward. Three combinations cover many Camera Link installations.
MDR26 to MDR26
Choose this cable when both the industrial camera and frame grabber use MDR26 connectors. It is common in established Camera Link machines and equipment using the traditional connector format.
SDR26 to SDR26
Choose this cable when both devices use the compact SDR26 interface. It is especially suitable for Mini Camera Link cameras and frame grabbers designed around smaller connectors.
MDR26 to SDR26
Choose this configuration when one piece of equipment uses MDR26 and the other uses SDR26. It provides the required interface transition in one finished Camera Link cable assembly.
Why Use an MDR26-to-SDR26 Cable?
Machine vision systems do not always use the same connector format at both ends. A compact SDR26 camera, for example, may need to connect to a frame grabber that retains an MDR26 interface.
A finished MDR26-to-SDR26 assembly provides a direct cable solution without adding a separate external adapter. The actual Camera Link configuration, length and PoCL requirements should still be confirmed before ordering.
6. How to Select the Correct Camera Link Cable
The easiest way to select the cable is to start with the equipment interfaces rather than starting with the cable itself.
| Camera Side | Frame Grabber Side | Recommended Cable | Typical Situation |
|---|---|---|---|
| MDR26 | MDR26 | MDR26 to MDR26 | Traditional Camera Link hardware |
| SDR26 | SDR26 | SDR26 to SDR26 | Compact / Mini Camera Link equipment |
| MDR26 | SDR26 | MDR26 to SDR26 | Different connector formats at each end |
| SDR26 | MDR26 | SDR26 to MDR26 | Different connector formats at each end |
Information to Check Before Selecting the Cable
Confirm the exact industrial camera model and its Camera Link connector.
Identify whether the frame grabber provides an MDR26 or SDR26 connection.
Specify the actual routing length rather than selecting a cable based only on connector type.
Determine whether the cable will remain fixed or operate in a moving machine application.
Confirm whether the connected camera and frame grabber use Power over Camera Link.
Check cable-exit direction and available rear-panel space where orientation matters.
7. Standard Camera Link vs Mini Camera Link
The terms standard Camera Link and Mini Camera Link mainly help describe the physical connector format found on the equipment. They should not be interpreted as separate choices that can be freely substituted on the same camera.
MDR26 Camera Link
MDR26 uses the larger traditional 26-position interface and remains common on many existing cameras, frame grabbers and machine vision systems.
SDR26 Mini Camera Link
SDR26 uses a smaller 0.8 mm pitch connector format that helps reduce interface size on compact industrial cameras and compatible image acquisition equipment.
Which one should you choose? In most replacement and equipment-integration projects, the answer is determined by the connector already installed on the camera and frame grabber rather than by a general preference for MDR or SDR.
8. PoCL, Cable Length and Motion Requirements
Connector type is only one part of Camera Link cable selection. Power requirements, routing distance and mechanical movement can also affect the correct cable construction.
PoCL
Power over Camera Link can supply camera power through a compatible Camera Link connection. Confirm support at the camera, frame grabber and complete cable level before ordering.
Cable Length
Select the length according to equipment placement and system requirements. Longer is not automatically better because signal integrity remains part of the complete Camera Link connection.
Static or Moving Cable
A fixed inspection camera and a moving camera axis impose different mechanical requirements. Repetitive motion should be identified when specifying the cable construction.
PoCL note: The presence of an MDR26 or SDR26 connector alone does not prove that a system supports PoCL. Verify the equipment documentation and cable requirements before replacing an existing assembly.
9. When Do You Need an SDR26 Connector Instead of a Finished Cable?
For most camera-to-frame-grabber installations, a finished Camera Link cable is the simplest solution. Some OEM, prototype and maintenance projects, however, require the cable-side connector separately.
PCM-TAT-0006 is an SDR 26-pin solder connector with a 0.8 mm contact pitch. It can be used when building an SDR cable assembly in-house, replacing a damaged connector, developing a prototype or producing an equipment-specific cable with a different opposite-end interface.
Connector-only applications: OEM cable production, repair, prototype development, custom pinout assemblies and special equipment interconnection.
Finished Cable vs Connector-Only Solution
| Requirement | Finished Cable | SDR26 Connector Only |
|---|---|---|
| Direct camera-to-frame-grabber connection | Recommended | Not by itself |
| Standard machine installation | Recommended | Not by itself |
| In-house cable production | Optional | Suitable |
| Prototype cable assembly | Available | Suitable |
| Equipment-specific opposite end | Custom cable | Suitable |
| Connector repair / replacement | Replace complete cable | Suitable |
10. Custom MDR26 and SDR26 Camera Link Cable Assemblies
Standard Camera Link configurations cover many machine vision applications, but replacement projects, OEM equipment and system integration work may require different connector combinations, lengths or mechanical cable constructions.
Connector Configurations
- MDR26 to MDR26
- SDR26 to SDR26
- MDR26 to SDR26
- SDR26 to MDR26
- Connector-only assemblies
Cable Requirements
- Custom overall length
- Static cable construction
- Moving / flexible applications
- Connector orientation
- Shielded cable construction
Project Information
- Camera model
- Frame grabber model
- PoCL requirement
- Existing part number or drawing
- Equipment-specific requirements
Recommended information for custom projects: provide the camera model, frame grabber model, connector combination, required cable length, PoCL requirement and quantity. An existing cable photo, drawing or physical sample can also help confirm the correct configuration.
Frequently Asked Questions
What is the difference between MDR26 and SDR26?
Both connectors have 26 contacts, but MDR26 and SDR26 use different physical dimensions and mating interfaces. SDR26 is more compact and commonly associated with Mini Camera Link equipment.
Is SDR26 the same as Mini Camera Link?
SDR26 is commonly used as the compact physical connector format for Mini Camera Link equipment.
Can an MDR26 camera connect to an SDR26 frame grabber?
Yes, provided the equipment supports the required Camera Link configuration and a correctly wired MDR26-to-SDR26 Camera Link cable is used.
Which connector is smaller, MDR26 or SDR26?
SDR26 is the smaller connector format and is commonly used when industrial camera or equipment space is limited.
Is SDR26 faster than MDR26?
Not necessarily. Connector size does not by itself determine the performance of the Camera Link system. The camera, frame grabber, supported configuration, cable construction and cable length should also be considered.
Can MDR26 and SDR26 Camera Link cables support PoCL?
PoCL configurations can use these connector formats, but the camera, frame grabber and complete cable assembly must all be checked for the required Power over Camera Link configuration.
When do I need an MDR26-to-SDR26 Camera Link cable?
Use an MDR26-to-SDR26 cable when one side of the Camera Link system has an MDR26 connector and the other side has an SDR26 connector.
Can I buy an SDR26 connector without a complete cable?
Yes. SDR26 connector-only products such as PCM-TAT-0006 can be used for OEM cable assembly, equipment integration, prototypes, cable repair and application-specific wiring.
Need Help Selecting an MDR26 or SDR26 Camera Link Cable?
Send the camera model, frame grabber model, connector types, required cable length and quantity. Premier Cable can review whether your system requires MDR26-to-MDR26, SDR26-to-SDR26 or MDR26-to-SDR26.
Custom cable length, connector orientation, cable construction, moving or static application requirements and OEM labeling can also be discussed for machine vision and industrial imaging projects.
