Advantech PCL-10250 vs. PCL-10251: Pinout & Replacement Guide
100-pin to dual 50-pin SCSI cable differences, branch wiring, compatible card families and replacement selection
Quick reference: PCL-10250 and PCL-10251 use the same basic connector configuration - one 100-pin male connector branching to two 50-pin male connectors - but they use different internal pin assignments. Do not select a replacement by connector appearance alone. Confirm the original PCL part number, target Advantech card, branch pinout and cable length.
Terminology note: Advantech describes these products as SCSI-100 to dual SCSI-50 wiring cables. In industrial DAQ and motion-control systems, the SCSI-style connector is used as a high-density I/O interface; these cables are not being discussed here as conventional computer-storage SCSI cables.
Contents
What Are the PCL-10250 and PCL-10251 Cables?
PCL-10250 and PCL-10251 are Advantech PCL-series high-density I/O wiring cables. Both use one half-pitch 100-pin male connector on the card side and two half-pitch 50-pin male connectors on the branch side. Advantech specifies 25 twisted pairs with a drain wire, aluminum/Mylar foil plus braided-copper shielding, and a black PVC jacket for both cable families.
Their physical similarity is the main reason they are easy to confuse. A buyer looking only at the 100-pin connector, dual 50-pin branches or Y-cable appearance could reasonably assume that PCL-10250 and PCL-10251 are interchangeable. They are not. The internal routing from the 100-pin P0 connector to the two 50-pin output connectors is different.
Do not select by appearance alone: A cable can mate mechanically and still be electrically incorrect. For PCL-10250 and PCL-10251 replacement projects, the branch pin assignment is a primary compatibility requirement.
PCL-10250 vs PCL-10251 - Quick Comparison
The table below separates the similarities that can be checked from the connector and cable construction from the differences that determine actual compatibility.
| Feature | PCL-10250 | PCL-10251 |
|---|---|---|
| Advantech description | SCSI-100 to 2 × SCSI-50 shielded cable | 100-pin to two 50-pin SCSI cable |
| Connector configuration | 1 × 100-pin male to 2 × 50-pin male | 1 × 100-pin male to 2 × 50-pin male |
| Original cable construction | 25 twisted pairs + drain wire; foil + braided copper shield; PVC | 25 twisted pairs + drain wire; foil + braided copper shield; PVC |
| Original UL reference | UL 20276 | UL 2919 |
| Key electrical difference | Interleaved 100-pin branch assignment | First 50 pins to P1; second 50 pins to P2 |
| Typical Advantech use | PCI/PCIE-1752, 1754 and 1756 digital I/O families | PCI-1240/1240U and related motion-control families |
| Premier compatible reference | PCM-S-0764 | PCM-S-0759 |
| Premier drawing lengths | 1 m / 2 m | 1 m / 2 m |
| Interchangeable? | No - verify pinout | No - verify pinout |
Selection shortcut: If the equipment documentation specifies PCL-10250, use a PCL-10250-compatible pin assignment such as PCM-S-0764. If it specifies PCL-10251, use a PCL-10251-compatible pin assignment such as PCM-S-0759. Do not substitute one for the other simply because the connector shells match.
The Key Difference: Internal Pin Assignment
The clearest way to understand the difference is to compare the branch logic shown on the Premier Cable production drawings. Both drawings label the 100-pin connector as P0 and the two 50-pin connectors as P1 and P2, but the way P0 is divided between the two branches is different.
PCM-S-0764: Interleaved Branch Groups
P1 receives P0 pins 1–25 and 51–75, while P2 receives P0 pins 26–50 and 76–100. In other words, the two 50-pin branches are formed from alternating 25-pin groups on the 100-pin side.
- P0-1 → P1-1; P0-51 → P1-26
- P0-2 → P1-2; P0-52 → P1-27
- P0-25 → P1-25; P0-75 → P1-50
- P0-26 → P2-1; P0-76 → P2-26
- P0-50 → P2-25; P0-100 → P2-50
PCM-S-0759: P0 1–50 to P1, 51–100 to P2
Unlike the PCL-10250-compatible mapping, the PCL-10251-compatible wiring keeps the P0 branch grouping continuous: P0 pins 1–50 are routed to P1, while P0 pins 51–100 are routed to P2.
- P0-1 → P1-1; P0-2 → P1-26
- P0-3 → P1-2; P0-4 → P1-27
- P0-49 → P1-25; P0-50 → P1-50
- P0-51 → P2-1; P0-52 → P2-26
- P0-99 → P2-25; P0-100 → P2-50
Practical replacement rule: When the original cable label is missing, obtain the card model and approved wiring diagram before ordering. A continuity test of the existing cable can also confirm which branch mapping is required.
PCL-10250 for Advantech DAQ and Digital I/O Cards
Advantech documentation lists PCL-10250 as a wiring cable for high-density digital I/O card families including PCI/PCIE-1752, PCI/PCIE-1754 and PCI/PCIE-1756. These 100-pin I/O cards are used with compatible terminal-board solutions such as ADAM-3951, so the card model and terminal-board arrangement should be verified together when selecting a replacement cable.
PCL-10250 Compatible 100-Pin to Dual 50-Pin Cable
PCM-S-0764 is designed as a compatible breakout-cable reference for PCL-10250 applications. The drawing uses one HPDB100P male IDC connector and two HPDB50P male IDC branch connectors, with molded black PVC housings and screw-locking hardware.
- HPDB100 male to dual HPDB50 male
- 1 m and 2 m drawing options
- 28 AWG × 25-pair, 8.0 mm OD black PVC cable
- UL20276 cable reference on the current Premier drawing
- PCL-10250-compatible interleaved branch pin assignment
Application check: Confirm the exact PCI/PCIE card model and terminal-board arrangement. Even within a familiar 100-pin I/O platform, the equipment manual should remain the controlling reference for cable selection.
PCL-10251 for Advantech Motion Control Systems
Advantech's PCI-1240/PCI-1240U manual specifies PCL-10251 as the wiring cable for these motion-control cards and explains that the shielded twisted-pair construction is intended to improve noise resistance and reduce crosstalk. Advantech documentation for later PCI-1245/1245V/1245E and PCI-1265 families also lists PCL-10251 for card-to-wiring-board connections.
PCL-10251 Compatible 100-Pin to Dual 50-Pin Cable
PCM-S-0759 is the Premier Cable reference for PCL-10251-compatible branch wiring. It uses the same basic HPDB100-to-dual-HPDB50 mechanical layout as PCM-S-0764, but the P0-to-P1/P2 assignment follows the PCL-10251-style grouping rather than the PCL-10250-style interleaving.
- HPDB100 male to dual HPDB50 male
- 1 m and 2 m drawing options
- 28 AWG × 25-pair, 8.0 mm OD black PVC cable
- UL20276 cable reference on the current Premier drawing
- P0 pins 1–50 routed to P1 and 51–100 routed to P2
Construction note: Advantech's current PCL-10251 product specification references UL2919, while the current PCM-S-0759 drawing specifies UL20276. PCM-S-0759 should therefore be described as a compatible replacement cable based on the required interface and pin assignment, not as an identical copy of every original cable-construction detail.
Cable Construction and Length Options
Connector and pinout compatibility are the first checks, but cable construction also matters in industrial cabinets, DAQ systems and motion-control installations. The current PCM-S-0764 and PCM-S-0759 drawings use the same Premier Cable mechanical and cable specification; the primary difference between the two assemblies is the branch wiring.
| Premier Drawing Item | PCM-S-0764 | PCM-S-0759 |
|---|---|---|
| 100-pin connector | HPDB100P male, IDC type | HPDB100P male, IDC type |
| Branch connectors | 2 × HPDB50P male, IDC type | 2 × HPDB50P male, IDC type |
| Cable | 28 AWG × 25 pairs; 8.0 mm OD; black PVC; UL20276 | 28 AWG × 25 pairs; 8.0 mm OD; black PVC; UL20276 |
| Connector finish / housing | Black insulator; molded black PVC | Black insulator; molded black PVC |
| Locking hardware | 2-56 UNC screw hardware | 2-56 UNC screw hardware |
| Standard drawing lengths | 1000 ± 30 mm / 2000 ± 30 mm | 1000 ± 30 mm / 2000 ± 30 mm |
| Production electrical check | 100% open, short and miswire test | 100% open, short and miswire test |
Choose 1 m When
- The card and terminal boards are inside the same cabinet.
- Shorter routing reduces excess cable management.
- The original system specifies the 1 m reference.
Choose 2 m When
- The terminal boards are farther from the control card.
- The route passes through cabinet trays or partitions.
- Additional service loop or installation tolerance is required.
How to Select the Correct Replacement Cable
Start with the equipment and original part number rather than the visible connector. The correct replacement process is short, but the order matters.
1. Identify the Card Model
Check the Advantech card or controller model first. Advantech documentation lists PCL-10250 for PCI/PCIE-1752/1754/1756 digital I/O families, while PCL-10251 is specified for PCI-1240/1240U and other listed motion-control families.
2. Confirm the Original PCL Number
Read the cable label, BOM, maintenance record or equipment manual. A confirmed PCL-10250 or PCL-10251 reference immediately narrows the required pinout.
3. Verify the Branch Pinout
Do not stop after confirming 100-pin to dual 50-pin connectors. Compare the P0-to-P1/P2 assignment with the approved wiring drawing or continuity map.
4. Confirm Length and Construction
Select the correct 1 m or 2 m route and confirm any project-specific requirements for cable type, jacket, shielding, labeling, connector hardware and documentation.
Most common sourcing mistake: Ordering a generic "100-pin to dual 50-pin SCSI cable" without specifying PCL-10250 or PCL-10251 pinout. The connector description alone is incomplete for this application.
Information to Provide When Ordering a Replacement Cable
For maintenance, retrofit or replacement projects, providing the information below makes it easier to confirm whether PCM-S-0764, PCM-S-0759 or a custom wiring configuration is required.
Equipment and Original Cable
- Advantech card or controller model
- Terminal-board model, if known
- Original PCL cable number or existing cable label
- Existing wiring drawing, system BOM or connector photos, if available
Required Cable Configuration
- Required PCL-10250 or PCL-10251 pinout reference
- Required 1 m, 2 m or custom cable length
- Connector hardware, cable exit or installation constraints
- Any approved P0-to-P1/P2 wiring definition for non-standard projects
Order and Documentation Requirements
- Required quantity and sample needs
- Cable construction, shielding or jacket requirements
- Labeling and OEM packaging requirements
- Inspection report, drawing or other documentation requirements
Production Verification for Confirmed Orders
- 100% open-circuit, short-circuit and miswire test against the approved pin assignment.
- Connector type, branch identification and screw hardware inspection.
- Cable length, overmold, connector seating and strain-relief inspection.
- Label and packaging verification where specified.
Technical information basis: This comparison is based on current Premier Cable drawings for PCM-S-0764 and PCM-S-0759 together with Advantech PCL-series product specifications and card manuals. Equipment manuals and approved project drawings should remain the final compatibility reference.
Last reviewed: August 2026 | Prepared by: Premier Cable Product Team
Frequently Asked Questions
Are PCL-10250 and PCL-10251 interchangeable?
No. They use the same basic 100-pin-to-dual-50-pin connector configuration, but the internal branch pin assignments are different. A replacement should be selected against the specified PCL model or verified wiring diagram.
What connector does PCL-10250 use?
Advantech specifies one half-pitch 100-pin male connector and two half-pitch 50-pin male connectors. Premier Cable PCM-S-0764 uses the corresponding HPDB100P male to dual HPDB50P male arrangement.
What connector does PCL-10251 use?
PCL-10251 also uses one 100-pin male connector and two 50-pin male connectors. Premier Cable PCM-S-0759 follows this same mechanical layout with a different internal branch assignment.
Which cable is used with Advantech PCI-1754?
Advantech documentation lists PCL-10250 as an optional wiring cable for PCI-1754. Related PCI/PCIE-1752 and 1756 digital I/O families also list PCL-10250 in their accessory documentation.
Which cable is used with Advantech PCI-1240 or PCI-1240U?
Advantech's PCI-1240/PCI-1240U manual specifies PCL-10251 as the wiring cable. The manual also explains that its twisted-pair shielded construction is intended to improve signal quality by reducing crosstalk and external noise.
What is the difference between PCL-10250-1E and PCL-10250-2E?
The primary ordering difference is cable length: PCL-10250-1E is the 1 m version and PCL-10250-2E is the 2 m version. The required length should be selected according to the original equipment specification and cabinet routing.
Can a generic 100-pin to dual 50-pin SCSI cable replace PCL-10250 or PCL-10251?
Not without verification. Connector count and gender only confirm mechanical compatibility. The P0-to-P1/P2 pin assignment, cable construction, locking hardware and target equipment must also match.
Can PCL-10250 or PCL-10251 compatible cables be customized?
Yes. Project-based options can include cable length, pin assignment, cable construction, shielding requirement, labels and packaging. Any change to the standard wiring should be approved against the equipment interface before production.
Need a PCL-10250 or PCL-10251 Compatible Cable?
Send the original PCL part number, Advantech card model, required cable length and any available wiring drawing or connector photos. Premier Cable can review the required configuration and determine whether PCM-S-0764, PCM-S-0759 or a custom high-density I/O cable is the appropriate match.
For replacement projects, pinout review is recommended before production. Custom cable length, pin assignment, cable construction, labeling and OEM packaging can be discussed based on the project requirement.
