Micro-D 9-Pin Female to DB9 Male Shielded Cable: Features, Applications and Selection Guide
PCM-S-0788 is a 2m Micro-D 9-pin female to DB9 male shielded cable with 28AWG×9C UL2464 cable for industrial control and test equipment.
PCM-S-0788 is a 2m Micro-D 9-pin female to DB9 male shielded cable featuring 28AWG×9C UL2464 wiring, foil and braid shielding, a drain wire, molded strain relief and locking screws. It is designed for industrial control, ATE, instrumentation and compact equipment interconnection.
Quick Product Introduction
PCM-S-0788 Standard Structure:
Micro-D 9-Pin Female → 2m UL2464 Shielded Cable → DB9 9-Pin Male
| Product Name | Micro-D 9-Pin Female to DB9 Male Shielded Cable |
| Premier Cable P/N | PCM-S-0788 |
| P1 | Micro-D 9-Pin Female |
| P2 | DB9 9-Pin Male |
| Length | 2000±30mm |
| Cable Style | UL2464 |
| Conductors | 28AWG x 9C |
| Shielding | Aluminum Foil + Braid + Drain Wire |
| Cable OD | 5.6mm |
PCM-S-0788 vs Standard DB9 Extension Cablevoovt
| Comparison | PCM-S-0788 | Standard DB9 Extension Cablevoovt |
|---|---|---|
| Micro-D Interface | Yes | No |
| Standard DB9 | Yes | Yes |
| Compact Equipment | Excellent | Limited |
| Foil Shield | Yes | Depends |
What Is a Micro D to DB9 Cable?
A Micro-D-to-DB9 cable is a passive multi-conductor signal assembly designed to connect compact Micro-D equipment interfaces with conventional D-Sub equipment interfaces.
PCM-S-0788 uses nine independent conductors to establish electrical connections between two 9-pin connectors. It supports connector-format adaptation, equipment interconnection, signal extension, legacy-to-modern module integration, and test-interface expansion.
The cable contains no conversion chips or signal-processing electronics and does not alter the original communication protocol or signal levels. Its actual function depends on the electrical configuration of the connected equipment.
PCM-S-0788 →What Is a Micro-D Connector ?
Micro-D is a family of miniature, high-density D-shaped connectors designed to provide smaller interface dimensions and higher installation density than conventional D-Sub connectors.
Molex's Commercial Micro-D platform uses a 1.27mm (0.050-inch) centerline and offers configurations such as 9, 15, and 25 circuits, with support for 26AWG or 28AWG shielded cable applications.
Its compact construction helps reduce connector footprint in space-constrained equipment, making it suitable for test instruments, industrial controllers, data acquisition systems, and high-density electronic modules.
Pain Points
Core Product Value
PCM-S-0788
◆ Direct Micro D to DB9 Interconnection and 9-Pin Straight-Through Wiring
PCM-S-0788 combines a compact Micro-D 9-pin female connector with a standard DB9 male connector, enabling space-constrained modules to interface with conventional D-Sub equipment. Its nine conductors use corresponding 1:1 straight-through wiring without protocol chips or active conversion circuitry.
This makes the cable suitable for interface extension, cable replacement, and test expansion where a defined pin assignment already exists. The direct interconnection reduces additional adapter stages, while actual signal compatibility must still be verified against equipment pinouts and electrical specifications.
◆ Dual-Layer Shielding and Secure Dual-End Screw Locking
PCM-S-0788 incorporates foil, braided shielding, and a drain wire to provide a comprehensive shielding structure. The foil offers high coverage, while the braid improves mechanical durability and provides a conductive shielding path.
Together with proper grounding, this construction helps reduce external EMI effects. The Micro-D end uses #2-56UNC locking hardware, while the DB9 end uses #4-40UNC locking hardware.
These dedicated fastening structures improve mating security and help reduce accidental loosening during vibration, equipment movement, and routine maintenance in industrial and test installations.
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Compatibility Statement
Compatibility Verification
PCM-S-0788 features a Micro-D 9-pin female connector and a standard DB9 male connector, but matching contact counts do not guarantee mechanical or electrical compatibility.
Before selection, verify the Micro-D series, 1.27mm mating geometry, connector gender, screw hardware, mechanical dimensions, pin assignment, signal type, and shield-grounding requirements.
DB9 defines a connector structure rather than the RS-232 protocol and may carry RS-422, RS-485, CAN, GPIO, or proprietary signals. Compatibility must be confirmed against the equipment specifications.
DB9 Connector ≠ RS-232 Protocol
Technical Compatibility Notice
PCM-S-0788 uses a 9-pin, 1:1 straight-through wiring configuration, with P1 Pins 1 through 9 connected to their corresponding P2 pins.
This defines conductor mapping only. As a passive cable assembly, it does not include protocol conversion, signal-level conversion, or active transceiver circuitry. Compatibility with RS-232, RS-422, RS-485, CAN, or other industrial communications depends on the equipment PHY, transceiver, pin assignment, and signal levels.
A matching connector or straight-through wiring alone does not establish protocol compatibility.
Straight-Through Cable ≠ Protocol Converter
How to Choose the Correct Cable ?
Verify the Micro-D Series and Geometry
Verify the exact Micro-D series, 1.27mm geometry, connector gender and shell dimensions before selection.
Verify Pin Assignment and Straight-Through Wiring
Confirm that straight-through 1:1 wiring matches the equipment. Custom crossover or device-specific pin mapping may be required in other systems.
Verify Signal Type and Cable Requirements
Match conductor construction to the actual signal type, especially when differential buses require controlled impedance or twisted pairs.
Verify Locking Hardware and Installation Space
Verify the #2-56 and #4-40 locking hardware, jackposts, screw length and equipment clearance.
Customization Capabilities
↕ Micro-D Connector Customization
Micro-D circuit count, gender, shell and locking configurations can be customized according to equipment requirements.
□ DB9 Connector Customization
DB9 gender, shell and locking-screw configurations can be customized.
◉ Pin Assignment Customization
Straight-through, crossover, null-modem and equipment-specific pin assignments can be produced according to customer drawings.
⚙ Cable and Shielding Customization
Conductor count, wire gauge, twisted pairs and shielding structures can be customized for different signal environments.
⌘ Length and Jacket Customization
Custom lengths and jacket constructions can be developed for equipment-specific routing requirements.
◇ OEM/ODM Shielded Signal Cable Development
Complete OEM/ODM Micro-D-to-D-Sub assemblies can be developed with customized connector, wiring, shielding and test requirements.
Conclusion：
PCM-S-0788 is a shielded Micro-D 9-pin female to DB9 male cable designed to bridge compact industrial interfaces with conventional D-Sub equipment.
Its 1:1 wiring, foil-and-braid shielding, drain wire, locking hardware and molded strain relief make it suitable for industrial automation, semiconductor test, instrumentation and equipment-retrofit applications.
Compatibility should always be verified from the exact connector geometry, pin assignment, signal definition and mechanical hardware.
Product FAQ
What Is a DB9 Connector ?
DB9 is the commonly used market term for the 9-position D-Sub interface, technically often designated DE-9.
Does DB9 Automatically Mean RS-232 ?
No. DB9 identifies the connector format, whereas RS-232 defines an electrical communication interface.
Why Use Foil Shielding ?
Foil shielding provides broad coverage and helps reduce high-frequency electromagnetic coupling.
What Is a Drain Wire ?
A drain wire provides a practical electrical connection between the cable shield and the connector or chassis-ground structure.
Does Dual Shielding Eliminate EMI ?
No. EMC performance also depends on grounding, connector shielding, routing and the surrounding equipment environment.
Why Use a Metal Connector Shell ?
Metal connector shells help maintain shielding continuity through the connector transition.
