MDR, HPDB & VHDCI SCSI Cable Guide | Mini-SCSI-100 and PCL-101100S Compatible Cable
High-density SCSI cable assemblies are still widely used in industrial equipment, motion control systems, data acquisition platforms, test instruments, storage systems and custom automation machines.
Although many of these cables are generally called "SCSI cables," the actual connector type can be very different. MDR, HPDB, HPCN and VHDCI are not the same connector. They have different housing shapes, pin counts, locking structures and application environments.
Selecting the wrong cable may result in an interface mismatch, unstable signal transmission, or a cable that cannot be connected to the equipment at all.
This guide explains the differences between common SCSI-style high-density connectors and introduces several industrial cable assemblies from Premier Cable, including MDR 36-pin, MDR 100-pin and HPDB 100 to VHDCI 100 cable solutions.
📋 Contents
What Is a SCSI Cable in Industrial Applications?
SCSI originally stands for Small Computer System Interface. It was first used in computer peripheral and storage systems, but many industrial manufacturers later adopted SCSI-style high-density connectors because they can carry many signal lines in a compact cable assembly.
Today, SCSI-style cables are commonly found in:
- Motion control systems
- CNC control equipment
- Servo drive platforms
- Data acquisition systems
- Automated test equipment
- Industrial I/O expansion modules
- FPGA and DSP-based systems
- Legacy SCSI storage systems
- Machine vision and inspection equipment
However, the term "SCSI cable" alone is not enough to define the correct product. The connector type, pin count and wiring pinout must always be confirmed before ordering.
Common SCSI Connector Types: MDR, HPDB, HPCN and VHDCI
MDR Connector
MDR stands for Mini D Ribbon or Mini Delta Ribbon. It is a compact high-density connector commonly used for industrial signal transmission and high-speed I/O applications.
MDR connectors are often used in motion controllers, machine vision equipment, industrial control systems, multi-axis servo platforms, data acquisition equipment and high-density I/O modules.
Common MDR pin counts include 26-pin, 36-pin, 50-pin, 68-pin and 100-pin. For example, MDR 26-pin is commonly associated with machine vision and Camera Link systems, while MDR 36-pin and MDR 100-pin are often used in industrial control, motion control and custom equipment interfaces.
HPDB Connector
HPDB usually refers to Half Pitch D-Sub or High Density D-Sub connectors. It looks similar to a D-Sub style interface but with a much higher contact density.
HPDB connectors are commonly used in DAQ systems, industrial I/O cards, test and measurement equipment, SCSI storage systems, control board to terminal board connections and breakout cable assemblies. HPDB 50-pin, 68-pin and 100-pin interfaces are often found in industrial and legacy equipment where many signal lines need to be transmitted through one compact connector.
VHDCI Connector
VHDCI stands for Very High Density Cable Interconnect. It is a very compact high-density interface used where equipment panel space is limited.
VHDCI connectors are commonly used in SCSI RAID storage systems, DAQ and digital I/O equipment, industrial computing platforms, multi-channel signal transmission systems, FPGA and custom control systems and breakout cable applications. VHDCI is not interchangeable with MDR or HPDB connectors. Even if the pin count is similar, the connector shape and mating interface are different.
HPCN Connector
HPCN usually refers to High Density Centronics or Half Pitch Centronics connectors. It is another type of SCSI-style high-density interface, often used in industrial equipment, older SCSI systems, terminal boards and control modules. Although HPCN, MDR, HPDB and VHDCI may all be described as SCSI connectors, they are physically different connector systems.
MDR vs HPDB vs VHDCI vs HPCN: Key Differences
| Connector Type | Typical Meaning | Common Pin Counts | Typical Applications | Interchangeable? |
|---|---|---|---|---|
| MDR | Mini D Ribbon / Mini Delta Ribbon | 26, 36, 50, 68, 100 | Motion control, machine vision, industrial I/O, DAQ | Only with the same MDR type and pinout |
| HPDB | Half Pitch D-Sub / High Density D-Sub | 50, 68, 100 | DAQ, test equipment, industrial I/O, SCSI systems | No |
| VHDCI | Very High Density Cable Interconnect | Commonly 68, also used in custom high-density systems | Storage, DAQ, FPGA, industrial computing | No |
| HPCN | High Density Centronics / Half Pitch Centronics | 50, 68, 100 | SCSI equipment, terminal boards, control modules | No |
⚠️ Important: Do not choose a cable only by the word "SCSI." Always confirm the connector type, pin count, gender, locking method, cable length and wiring pinout.
Premier Cable SCSI High-Density Cable Assembly Options
Premier Cable provides industrial-grade SCSI-style cable assemblies for motion control, automation, DAQ, test equipment, storage systems and custom high-density signal transmission applications.
Below are several available product options.
1. PCM-0947 MDR 100 Pin SCSI Cable Assembly
Premier Cable PCM-0947 is a 1-meter MDR 100-pin SCSI cable assembly designed for reliable multi-channel signal transmission in industrial environments.
It uses a compact MDR 100-pin interface and is suitable for applications where many control, feedback, I/O or measurement signals must be transmitted through one shielded cable assembly.
Compatible Connector System
- 3M 101A0-6000EC 100-pin connector
- 3M 103A0-C200-00 connector housing
| Premier Cable Part Number | PCM-0947 |
| Product Name | SCSI 100 Pin MDR Cable Assembly |
| Connector Type | MDR 100 Pin |
| Unit Weight | 0.5 kg |
| Typical Use | Motion control, DAQ, industrial automation, servo systems, test equipment |
PCM-0947
MDR 100 Pin SCSI Cable Assembly
PCM-0947
3M Compatible MDR 100 Pin Connector Detail
Typical Applications
PCM-0947 is commonly used in DMC1700 series motion controllers, DMC1800 series motion controllers, multi-axis motion control platforms, servo motor control systems, industrial I/O expansion modules, data acquisition systems, automated test equipment and machine vision control platforms.
For industrial motion control systems, PCM-0947 can be used to connect controllers, terminal boards, I/O modules, servo drives and signal interface units.
2. PCM-0946 SCSI 36 Pin MDR Cable Assembly
Premier Cable PCM-0946 is an MDR 36-pin SCSI cable assembly designed for compact industrial signal transmission applications.
It is suitable for equipment that requires a smaller MDR interface than 50-pin, 68-pin or 100-pin systems, while still maintaining a reliable high-density connection.
Compatible Connector System
- 3M 10136-6000EC connector
- 3M 10336-3210-000 connector housing
| Premier Cable Part Number | PCM-0946 |
| Product Name | SCSI 36 Pin MDR Cable Assembly |
| Connector Type | MDR 36 Pin |
| Compatible Connector System | 3M 10136-6000EC / 3M 10336-3210-000 |
| Typical Use | Industrial control, signal transmission, compact I/O interface, custom equipment cable |
PCM-0946
SCSI 36 Pin MDR Cable Assembly
PCM-0946
3M Compatible MDR 36 Pin Connector Detail
Typical Applications
PCM-0946 can be used in industrial control equipment, compact I/O modules, motion control interface systems, custom automation machines, test and measurement equipment, machine vision auxiliary control interfaces and board-to-equipment signal connections.
Compared with MDR 100-pin cable assemblies, MDR 36-pin cables are more suitable for applications with fewer signal channels and limited installation space.
3. PCM-0948 HPDB 100 to VHDCI 100 Pin SCSI Cable
Premier Cable PCM-0948 is a high-density industrial-grade SCSI / LVDS parallel data transmission cable. It is designed with a 100-pin HPDB, High Density D-Sub interface to a 100-pin VHDCI, Very High Density Cable Interconnect interface.
This cable uses UL20276 30AWG 50-pair shielded construction, providing stable signal integrity, low crosstalk and strong EMI resistance for high-speed multi-channel data transmission.
| Premier Cable Part Number | PCM-0948 |
| Product Name | SCSI HPDB 100 to VHDCI 100 Pin Cable |
| Cable Type | UL20276 30AWG 50 Pair Shielded Cable |
| Cable Color | Beige |
| Unit Weight | 0.5 kg |
| Connector A | HPDB 100 Pin |
| Connector B | VHDCI 100 Pin |
| Typical Use | RAID storage, DAQ systems, motion control systems, FPGA / DSP platforms |
PCM-0948
HPDB 100 to VHDCI 100 Pin SCSI Cable
PCM-0948
UL20276 30AWG 50 Pair Shielded Cable Detail
Typical Applications
Enterprise Storage Systems
- SCSI RAID storage arrays
- External disk enclosure systems
- Server-to-storage expansion units
- Legacy SCSI-3 / Ultra320 storage platforms
Industrial Motion Control Systems
- Multi-axis CNC controllers
- Servo drive control platforms
- Industrial robot control systems
- Motion controller to I/O interface systems
Data Acquisition and Test Equipment
- Automated test equipment
- FPGA / DSP-based measurement systems
- High-speed multi-channel DAQ systems
- Signal validation platforms
FPGA and Industrial Computing Systems
- FPGA I/O expansion modules
- Industrial computer parallel bus systems
- Custom high-speed control architectures
- Embedded control platforms
PCM-0948 is suitable for systems that require HPDB 100 to VHDCI 100 high-density signal conversion between computing, measurement and control modules.
Mini-SCSI-100 / Advantech PCL-101100S Compatible Reference
In some industrial DAQ, motion control and I/O interface applications, customers may search for similar high-density 100-pin cable assemblies using terms such as Mini SCSI 100 Pin Cable, Mini-SCSI-100 Shielded Cable, 100 Pin VHDCI to SCSI-II Cable, or Advantech PCL-101100S compatible cable.
The Advantech PCL-101100S series is commonly referenced as a Mini-SCSI-100 shielded cable family, with cable length options such as PCL-101100S-1E, PCL-101100S-2E and PCL-101100S-3E. These reference keywords are useful when customers are looking for replacement or compatible high-density cable assemblies for industrial DAQ cards, motion control platforms, I/O systems and test equipment.
Practical sourcing note: For similar Mini-SCSI-100 / SCSI-100 / VHDCI 100-pin cable requirements, Premier Cable can support compatible or custom cable assembly solutions based on connector photos, equipment model, cable length, shielding structure and wiring pinout.
| Common Search Term | Typical Meaning | Related Premier Cable Direction |
|---|---|---|
| Mini SCSI 100 Pin Cable | 100-pin Mini-SCSI style high-density shielded cable | Custom SCSI-100 / Mini-SCSI-100 cable support |
| Advantech PCL-101100S Compatible Cable | Replacement or compatible cable search for industrial DAQ and I/O applications | Confirm by connector shape, length and pinout before production |
| 100 Pin VHDCI to SCSI-II Cable | Customer-side search term for high-density 100-pin interface conversion cable | Related to PCM-0948 or custom HPDB / VHDCI / SCSI-100 cable assemblies |
| PCL-101100S Replacement Cable | Common replacement sourcing keyword for Mini-SCSI-100 shielded cable applications | Custom compatible cable assembly support after technical confirmation |
⚠️ Important: Similar names such as Mini-SCSI-100, SCSI-100, VHDCI 100 and SCSI-II 100 do not always mean the cable is mechanically or electrically interchangeable. Before ordering, please confirm the connector shape, pin count, locking structure, cable length, shielding design and wiring pinout.
How to Choose the Right Cable
Before choosing an MDR, HPDB, VHDCI or HPCN SCSI cable, confirm the following details:
- Connector type: MDR, HPDB, VHDCI or HPCN
- Pin count: 36-pin, 68-pin, 100-pin or another configuration
- Connector gender and mating interface
- Cable length
- Cable shielding requirement
- Wiring pinout
- Equipment model or original cable part number
- Application type: storage, DAQ, motion control, automation, machine vision or test equipment
If the equipment uses an MDR 100-pin interface, PCM-0947 may be suitable.
If the equipment uses an MDR 36-pin interface, PCM-0946 may be suitable.
If the equipment requires an HPDB 100 to VHDCI 100 connection, PCM-0948 may be the correct option.
Product Selection Summary
| Part Number | Product Name | Connector Type | Length | Main Applications |
|---|---|---|---|---|
| PCM-0947 | SCSI 100 Pin MDR Cable Assembly | MDR 100 Pin | 1 Meter | Motion control, DMC controllers, DAQ, automation, servo systems |
| PCM-0946 | SCSI 36 Pin MDR Cable Assembly | MDR 36 Pin | Application dependent | Industrial control, compact I/O, test equipment, custom automation |
| PCM-0948 | SCSI HPDB 100 to VHDCI 100 Pin Cable | HPDB 100 Pin to VHDCI 100 Pin | 2 Meters | RAID storage, DAQ, motion control, FPGA / DSP systems |
Why Connector Confirmation Is Important
Many industrial cables are described as SCSI cables, but their connectors are not interchangeable.
- MDR 100-pin is not the same as HPDB 100-pin.
- HPDB 100-pin is not the same as VHDCI 100-pin.
- MDR 36-pin cannot replace MDR 100-pin.
- VHDCI cables cannot be used with MDR equipment unless the system is specifically designed for that interface.
Before ordering, it is recommended to provide a connector photo, equipment model, original cable part number or wiring drawing. This helps confirm the correct cable assembly and avoid mismatched connectors.
Conclusion
SCSI-style high-density cable assemblies are widely used in industrial control, motion control, DAQ, test equipment, storage systems and FPGA-based platforms. However, MDR, HPDB, VHDCI and HPCN connectors are physically different and cannot be selected by the word "SCSI" alone.
Premier Cable offers multiple high-density cable options for different industrial applications:
- PCM-0947 MDR 100 Pin SCSI Cable Assembly for motion control, DAQ and automation systems
- PCM-0946 MDR 36 Pin SCSI Cable Assembly for compact industrial signal interfaces
- PCM-0948 HPDB 100 to VHDCI 100 Pin SCSI Cable for storage, DAQ, motion control and FPGA / DSP systems
- Custom Mini-SCSI-100 / SCSI-100 compatible cable assemblies for industrial DAQ and I/O applications
For industrial replacement, custom cable assembly or small-batch sourcing, please confirm the connector type, pin count and wiring pinout before ordering.
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