SCSI Cable Manufacturing for Replacement, OEM, and Legacy-System Support
BespokeCable manufactures custom SCSI cable assemblies for storage equipment, industrial systems, test instruments, and other long-life products that still depend on parallel SCSI or a mechanically similar high-density interface. This collection covers external shielded assemblies, internal ribbon cables, and mixed-connector configurations using VHDCI, HPDB, MDR, and Centronics-style connectors. Available families include 50-pin and 68-pin cables, with additional position counts reviewed against the required connector and equipment interface.
A matching pin count does not prove compatibility. Two 68-pin connectors may have different physical formats, while two cables with the same connector can have different pin maps or electrical requirements. Before you buy a SCSI cable, confirm the connector family and gender at each end, the equipment signaling mode, bus width, required transfer class, total installed bus length, termination arrangement, locking hardware, and available backshell clearance. HVD, LVD, and single-ended equipment must not be treated as interchangeable.
Our Shenzhen factory can build from a released drawing, wiring table, approved sample, or documented mating-interface requirement. Relevant processes include wire preparation, crimping, soldering, IDC termination, foil and braid shielding, backshell assembly, overmolding, labeling, and project-specific packaging. Inspection and testing are defined by the approved construction and order requirements, not assumed from the connector name.
If you are replacing an undocumented cable, send photos of both connector faces, the equipment labels, and the complete existing assembly. We can identify what information we still need before we quote and approve a sample. SCSI assemblies are part of our broader range of computer and industrial cable manufacturing.
SCSI Cable Products by Connector and Installation Type
The families below overlap by design. VHDCI, HPDB, MDR, and Centronics identify connector styles; 50-pin and 68-pin pages help buyers who know the contact count but not the connector name; ribbon cable identifies an internal construction. Use the comparison section after the product cards if you are unsure where to start.
Choose this family when one or both ports use a very-high-density VHDCI connector. Configurations include 68-pin VHDCI-to-VHDCI and VHDCI-to-HPDB68 assemblies, plus other drawing-controlled VHDCI arrangements. VHDCI is compact, so confirm the contact count, gender, screw hardware, hood width, and port spacing. For Ultra160 or Ultra320 equipment, also identify the LVD interface, complete bus configuration, and required cable construction. Specify video or test-equipment breakouts that use VHDCI with their own pin map.
MDR or Mini Delta Ribbon connectors appear in storage, motion-control, machine-vision, and equipment-specific I/O systems. Available connector sizes may include 14, 20, 26, 36, 50, and 68 positions, but position count does not establish the protocol. Select this family when the port has the matching MDR form, then provide the equipment model and pinout. Review connector-to-connector, MDR-to-IDC, and MDR-to-flying-lead configurations for control cabinets and replacement harnesses. Camera Link, servo, and SCSI versions require separate wiring definitions.
This family covers half-pitch HPDB cable configurations associated with many Fast and Wide SCSI installations, including 50-, 68-, and equipment-specific higher-position formats shown on the product page. Choose it when the equipment uses an HPDB connector, and you need to compare gender, screw versus clip retention, hood construction, or extension arrangements. The term “SCSI-2 cable” is not a complete specification: confirm whether the system is narrow or wide, the connector at both ends, signaling, pin map, and termination plan.
Centronics-style assemblies use a larger rectangular connector with bail clips, screws, or another defined retention method. This family includes common SCSI configurations such as CN50, plus other contact counts used by legacy equipment or non-SCSI parallel interfaces. Choose it when the connector body and locking system match your peripheral. Centronics 36, used for parallel printing, and Centronics 50, used for SCSI and proprietary industrial versions, are not interchangeable. Send a front-view photo or connector drawing when the exact series is uncertain.
Start with the 50-pin family when you know the equipment uses narrow SCSI but still need to identify whether the interface is HPDB50, Centronics 50, or an internal IDC ribbon connector. The page compares these common formats and their mechanical differences. State whether the assembly is internal or external, identify both connector faces, and confirm the signaling mode. A 50-pin count alone cannot determine connector pitch, gender, retention, cable length, or wiring.
Use the 68-pin family as a selection route for Wide SCSI installations using HPDB68, VHDCI 68, or an internal 68-position connection. Use it when you know the contact count but need to compare external and internal formats. Confirm the exact connector on each device, SE/LVD/HVD signaling, required transfer class, total bus layout, and termination. Do not assume that HPDB68 and VHDCI 68 mate directly or that every 68-pin ribbon assembly is appropriate for a high-speed LVD bus.
Choose an internal SCSI ribbon cable for board, drive, backplane, or device connections inside an enclosure. Common families include 50-position narrow SCSI and 68-position wide SCSI assemblies, with connector spacing and intermediate device positions defined by the chassis layout. Specify pin-1 orientation, connector keying, number and spacing of device connectors, total length, terminator arrangement, and the required bus class.
Connector and Pinout Identification Before Production
SCSI purchasing names are often inconsistent. Equipment vendors may use HPDB, half-pitch D-sub, micro-ribbon, Centronics, MDR, and VHDCI differently, and the same number of contacts can appear in more than one connector format. We review the connector face, pitch, shell, gender, keying, and retention method together. The approved drawing should also identify every populated contact, unused position, shield connection, and any equipment-specific crossover or breakout. This prevents a mechanically similar plug from being mistaken for an electrically compatible cable.
Cable Construction Matched to the Bus and Installation
External cables may require twisted pairs, an overall shield, defined shield termination, durable strain relief, and secure screw or latch retention. Internal assemblies may use conventional flat ribbon or a construction selected for the required signaling and routing conditions. Cable length is part of the complete SCSI bus, not an isolated product choice; internal traces, external cables, device count, topology, speed, and termination all affect the permitted configuration. Tell us the host adapter, attached devices, signaling mode, and installed route so we can evaluate the construction against the system requirements.
Custom Mechanical Options for Existing Equipment
Legacy systems often create mechanical constraints that modern off-the-shelf cables don’t have. A port may be recessed, two connectors may sit too close together for standard hoods, or a heavy cable may require positive retention. Depending on the connector family and project, we can evaluate molded or assembled backshells, metal or polymer hoods, screw or clip retention, straight or offset exits, panel interfaces, flying leads, and custom branch layouts. Final feasibility depends on the selected components, tooling, and approved geometry.
Drawing, Sample and Revision-Controlled Production
Projects can begin with a complete engineering package or an existing cable that must be reproduced. Before repeat production, freeze the connector part, pin map, cable construction, finished length, orientation, shield termination, labels, and test criteria in an approved drawing or golden sample. Typical controls can include incoming material review, in-process workmanship inspection, continuity and pin-to-pin verification, appearance checks, and packaging review. Additional electrical or mechanical tests can be included when they are defined in the order specification. See our cable quality control information when preparing a supplier qualification package.
You can evaluate a sample or pilot production after defining the connector, wiring, cable construction, and mechanical requirements. Use the sample to check mating, routing, pin mapping, and equipment operation. Document approval criteria and the production reference before a repeat order. Sample quantity and timing depend on component availability, tooling, and project complexity.
Review mixed-family purchasing for projects that need, for example, VHDCI, HPDB, and internal ribbon assemblies. List each item as a separate line with its own drawing revision, quantity, label, and packaging requirement. Do not merge technical specifications or test records between different cable constructions in the purchase order.
An existing sample, connector photos, and equipment manuals can support preliminary identification and reverse-engineering review. The original cable should not be copied blindly if it may be damaged or incorrectly wired. Before production, confirm the resulting connector identification, pin map, dimensions, and construction in an approved drawing or golden sample.
Yes, we can evaluate specified components or customer-supplied parts. Provide the complete manufacturer part number, revision, source requirements, and any restrictions on substitutes. If an equivalent is permitted, define the dimensions, materials, and electrical characteristics that must remain unchanged. Agree on availability, incoming inspection, and liability for customer-supplied material during quotation.
The bill of materials should identify which parts are fixed and which may use approved equivalents. Review any proposed substitute that affects mating, pin plating, cable construction, shield termination, hood geometry, or performance before use. State your approval and notification requirements in the purchase specification so purchasing and production follow the same rule.
Review project-specific labels, customer part numbers, barcodes, serial numbers, and packaging identification. Supply the label content, format, material, placement, numbering logic, and scan requirements. If identifiers must match cartons, packing lists, or test records, define the relationship before the first production release.
Evaluate kitting when the required grouping and identification are clearly defined. Provide the kit bill of materials, the quantity of each cable, bag or compartment requirements, the installation sequence, and the external label format. Each cable should retain its own part number and revision so you can trace a missing or incorrect item without opening every kit.
Depending on the order requirements, documentation may include an approved drawing, packing list, certificate of conformance, inspection record, or agreed test report. State the required document, format, language, lot reference, and signing requirements during quotation. Documentation availability should be confirmed for the specific product and test plan rather than assumed for the whole cable category.
Use the BespokeCable part number or your customer part number together with the approved drawing revision and any golden-sample reference. Do not order only by a generic name such as “68-pin SCSI cable.” If the equipment, connector source, pinout, length, or labeling has changed, identify the change before the order is released.
You can label spare assemblies with the equipment model, mating location, cable revision, production lot, or recommended inspection information specified by your maintenance program. You can also review packaging for long-term storage. State the expected storage environment and labeling fields so the proposed materials and package format can be evaluated.
You can provide the cable part number and revision, lot or serial identifier, installation date, host and device models, bus topology, termination arrangement, negotiated mode, and a clear description of the fault. Photos of both connector faces and any damaged area are helpful. Where available, include controller logs and continuity results without modifying the returned sample before review.
Yes. Review private labels, customer part numbers, and project-specific packaging for distributor and OEM orders. Supply the artwork, legal marks, package dimensions, language, barcode data, and carton rules. Brand use and compliance statements must be approved for the specific product; they are not added automatically from a generic packaging request.
How to Select a SCSI Cable for an Existing System
Identify the Physical Connector Before Using a SCSI Generation Name
Terms such as SCSI-1, SCSI-2, SCSI-3, Fast SCSI, Wide SCSI, Ultra160, and Ultra320 describe different stages or capabilities within the broader SCSI ecosystem. They do not always identify one physical connector. Equipment vendors used multiple internal and external connector formats, and some connectors also appear in non-SCSI applications.
Start with the port itself. Record the number of contacts, row arrangement, connector width, gender, keying, latch or screw system, and available backshell space. Photograph the connector straight on and include the equipment label in a second image. If possible, provide the connector drawing or relevant manual page. This gives engineering a better reference than an informal name such as “micro SCSI” or “SCSI-3 connector.”
Do Not Select by Pin Count Alone
A 50-pin request can refer to an external HPDB50 cable, a larger Centronics 50 assembly, or an internal IDC ribbon cable. A 68-pin request can refer to HPDB68, VHDCI 68, or an internal ribbon interface. These products differ in connector geometry and installation method, even before considering electrical requirements.
Use the following table as a routing guide, not as a compatibility guarantee:
| What You Know | Best Starting Family | What Still Must Be Confirmed |
|---|---|---|
| Compact VHDCI port | VHDCI Cable | 68 or 100 positions, gender, second connector, pinout, and signaling |
| Mini Delta Ribbon port | MDR Cable | Position count, protocol, pin map, and mating hardware |
| Half-pitch HPDB port | SCSI-2 HPDB Cable | 50, 68, or 100 positions, gender, screw or clip retention, and signaling |
| Large rectangular Centronics port | Centronics SCSI Cable | Position count, pitch, retention method, protocol, and pinout |
| Only “50-pin SCSI” is known | 50 Pin SCSI Cable | HPDB, Centronics, or IDC interface; internal or external use; and signaling |
| Only “68-pin SCSI” is known | 68 Pin SCSI Cable | HPDB, VHDCI, or ribbon format; gender; and SE, LVD, or HVD signaling |
| Internal flat cable | SCSI Ribbon Cable | 50 or 68 positions, connector spacing, keying, and bus class |
Confirm the Signaling Method: SE, LVD, or HVD
Parallel SCSI systems may use single-ended (SE), low-voltage differential (LVD), or high-voltage differential (HVD) signaling. These labels matter electrically. HVD must not be treated as interchangeable with SE or LVD. Some LVD devices are multimode and can operate on an SE bus, usually with different performance and distance constraints, but confirm that behavior in the controller and device documentation.
The cable quotation should therefore identify the host adapter and every attached device, not only the two connectors being joined. If the signaling method cannot be confirmed, do not rely on cable appearance. Check equipment manuals, controller labels, or manufacturer documentation before connecting the system.
Treat Speed and Cable Length as System-Level Requirements
The permitted length of a SCSI installation depends on the signaling method, transfer class, device count, cable construction, and topology. The relevant dimension is the total path between the ends of the bus, including internal and external sections—not simply the length of the cable being purchased. Stubs, adapters, and daisy-chained enclosures can also affect the installed bus.
For a replacement, record the existing internal and external cable lengths, the number of devices, and the negotiated operating mode. If you are changing the cable length or adding another device, review the complete topology against the host and peripheral specifications. Avoid using one universal maximum length for every SCSI generation.
Verify Termination at the Physical Ends of the Bus
Parallel SCSI requires correct termination at the physical ends of the bus. Depending on the equipment, the host adapter, the last device, a backplane, or a separate terminator may provide termination. An ordinary interconnect cable should not be assumed to contain termination.
Your system diagram should show the host, each device in order, and the two physical endpoints. Confirm which components supply termination and whether the required termination type matches the installed bus. Adding termination in the middle of a chain or leaving an endpoint unterminated can cause communication faults that a new cable alone won’t fix.
Match Retention, Hood Size and Exit Direction to the Hardware
SCSI cables can be mechanically heavy, while VHDCI contacts and closely spaced rack ports can be delicate. Confirm whether each connection uses thumbscrews, spring clips, bail latches, or another retaining feature. The cable assembly should mate without forcing the connector or loading adjacent ports.
Measure the available width and depth around recessed or densely arranged ports. If the standard hood blocks a neighboring connector or creates an excessive bend, include a chassis photo and dimensional sketch. A different hood, exit direction, or connector arrangement may solve the installation problem more reliably than sharply bending the cable after assembly.
Define Shielding and Shield Termination from the Installation
External assemblies in equipment racks or industrial cabinets may require foil, braid, or a combined shield construction, but the shield system must be specified as a complete path. Connector shell bonding, drain conductors, termination at one or both ends, and the equipment grounding design all influence the result. A metal hood can support a defined shield connection and add mechanical protection, but it should not be presented as a universal cure for interference.
Tell us about nearby motor drives, switching power supplies, transmitters, or other noise sources. Also identify flexing, abrasion, and cleaning exposure. These details help define cable and hood construction without making unsupported performance assumptions.
Use a Controlled Process for an Undocumented Replacement Cable
When no drawing exists, begin with the complete original assembly and both mating devices if available. Record connector face orientation before continuity mapping; otherwise, mirrored views can reverse the interpreted pin numbers. Note all connected and unused contacts, shields, jumpers, resistors, terminators, labels, and mechanical features.
A sample can serve as a construction reference, but release repeat production against an approved drawing or golden sample. If the old cable may already be defective, check its electrical mapping against the equipment documentation rather than copying it without review. For proprietary equipment, an engineering sample and functional approval may be appropriate before a bulk purchase.
Control the Drawing and Test Plan for Repeat Orders
The production package should identify connector manufacturers or approved equivalents, cable construction, finished length and tolerance, pin map, orientation, retention hardware, labeling, workmanship expectations, and test criteria. Continuity alone confirms the intended connections but does not prove every signal-integrity requirement. Where impedance, insulation resistance, withstand voltage, insertion force, or another test matters, define the method, sample size, and acceptance limit in the purchase specification.
For reorders, reference the approved drawing revision and any golden-sample identifier. Component substitutions, pinout changes, or hood revisions should require approval before production. This turns an old or proprietary cable into a controlled purchasing item rather than a repeated reverse-engineering exercise.
Information to Send for a SCSI Cable Quotation
For the fastest technical review, provide:
– Host adapter and peripheral manufacturer/model;
– Clear front-view photos of both ports;
– Connector family, contact count, and gender, if known;
– Internal or external installation;
– SE, LVD, or HVD signaling, if confirmed;
– Required transfer class or existing negotiated mode;
– Pin-to-pin drawing or approved sample;
– Finished cable length and total bus layout;
– Number and spacing of connectors for a ribbon or daisy-chain cable;
– Retention hardware, hood material, and cable-exit constraints;
– Shield and grounding requirements;
– Label, barcode, packaging, and documentation requirements;
– Sample quantity, estimated production quantity, and target schedule.
If you only have an existing cable, send full-length photos, close-ups of both connector faces, and the equipment model. We can use them for preliminary identification and tell you what additional information is needed before manufacturing approval.
