What is HD 50 pin SCSI Connector?
High-Density 50-Pin SCSI Connector (High Density 50-Pin SCSI Connector) is a compact connection solution specifically designed for the Small Computer System Interface (SCSI). 1.27mm pitch 50 pin SCSI Connector pin is in two assignment, 25 gold-plated pins lay on each side, widely used in data storage sevice and industrial control baord.
I. Technical Definition and Physical Characteristics of 50 pin SCSI Connector
Pin Pitch: standard 1.27mm (Half Pitch) SCSI external Connector, saving 50% space compared with full pitch (2.54mm).
Pin Arrangement: Two rows with 25 pins on each side, adopting D-type metal shell shielding design. Also named HPDB50 pin , HD50 pin , Micro DB50 pin , MD 50 pin, SCSI D-sub 50 pin etc.
Current Carrying Capacity: Usually 0.5-3A , suitable for low-power signal transmission.
Shell: Die-cast zinc alloy or tinned steel, providing 40-60dB EMI shielding effectiveness.
Contacts: Gold-plated, support termination methods such as IDC , soldering, DIP, PCB Clip and Surface Mount Technology (SMT), compatible with 28-30AWG 50 ways SCSI cables.
Locking Mechanism: Screw lock or spring latches, ensuring connection stability in vibrating environments.
Here is Micro DB 50 pin SCSI male connector drawing, which shows 50 pin SCSI connector pinout, SCSI-2 50 pin male connector structure.
II. Signal Transmission Characteristics of D-sub 50 pin SCSI Connector
Differential Signal Design:
Adopts 25 pairs twisted-pair wires for data transmission and integrates differential signal technology, reduces crosstalk and EMI. Typical differential impedance is 100Ω, supports a signal frequency of 10-20MHz, with a corresponding transmission rate of up to 10-20MB/s (Fast SCSI).
Protocol Compatibility
SCSI-2 Standard: Supports 8-bit parallel data transmission with a maximum rate of 10MB/s; when upgraded to Fast SCSI, rate doubles to 20MB/s.
Backward Compatibility: Connect to SCSI-1 devices via an adapter (e.g., HPDB50 to Centronics 50).
III. Typical Application Scenarios
Storage Devices
SCSI Hard Drives / Optical Drives: Such as early Macintosh computers and Sun workstations, support daisy-chain connections for up to 7 devices.
Tape Drives / RAID Arrays: High-density connections enable synchronous data transmission across multiple devices, such as Lomega Zip drives.
Industrial & Instrumentation
Data Acquisition (DAQ) Cards: Integrate analog/digital signal channels in limited space, such as products by National Instruments.
Industrial Control Modules: Used for high-density signal interaction between PLCs and sensors.
Professional Equipment
Medical Imaging Systems: For detector data transmission in devices like CT scanners, which require both high speed and anti-interference capability.
Test Equipment: Multi-channel signal input and output for instruments such as oscilloscopes and logic analyzer
IV. Comparison with Other SCSI Interfaces
|
Parameters |
|
 Centroncis 50 pin male connector |
 HD 68 pin female connector |
|
Picth of Pin |
1.27mm(Half pitch) |
2.54mm (Full Pitch) |
1.27mm(Half pitch) |
|
Data Transfer Rate |
10-20MB/s(Fast SCSI) |
5MB/s(SCSI-1) |
40-80MB/s(Ultra2 Wide) |
|
Signal Type |
Single-ended/ Differential (SCSI-2 Differential) |
Single-ended |
Differential (LVD) |
|
Number of Devices |
7 units (8-bit bus) |
7units |
15units (16-bit bus) |
|
Typical Applications |
Compact storage, industrial controller |
Early low-speed devices |
Enterprise-level storage, servers |
V. Common Types of HD50 pin SCSI Connector:
According to the connection function of connectors, we classify HD50 pin connectors into wire-to -wire connectors and wire-to-Board connectors.
Commonly wire-to-wire 50 pin SCSI connector:
Commonly wire-to-board 50 pin SCSI connector:
Starte is a professional HD 50 pin SCSI connector manufacturer in Shenzhen, China., Starte offers a complete line of 1.27mm pitch DB 50 pin SCSI Connectors, it can match and replace most main brand SCSI Connector, such as Honda, TE, 3M, Molex, Hirose. Such as IDC type HD 50 pin male connector is replacement of TE 5749111-4 1.27mm IDC D-sub 50 pin connector, matched with TE 5787082-5 0.50 Series 50 Position D-Shaped Board Mount Connector. Starte also make related backshell for 50 pin scsi male cable connector, locked by spring latches and screw.
If you have any demand of 50 pin SCSI connector, pls feel free to contact us.