The part number **M3SWVS-CAY-R** identifies a specific configuration of a **D-Sub Ribbon Cable Assembly** manufactured by **3M**. This component is used to connect hardware interfaces using standard D-Subminiature connectors and flat ribbon cables. --- ## 1. Part Number Breakdown To understand the electronic parts involved, we can deconstruct the 3M nomenclature: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **M3** | Manufacturer | 3M Company | | **S** | Connector A | Socket (Female) D-Sub Connector | | **W** | Connector B | Socket (Female) D-Sub Connector | | **V** | Number of Pins | 37-Pin configuration | | **S** | Strain Relief | Includes strain relief on both ends | | **CAY** | Cable Length/Type | 36.0" (914.40mm) length | | **R** | Compliance | RoHS Compliant | --- ## 2. Key Components & Specifications The assembly consists of three primary electronic/mechanical parts: ### A. The D-Sub Connectors * **Type:** 37-Position D-Sub Sockets (Female). * **Pitch:** 0.050" (1.27mm) spacing for the ribbon cable transition. * **Shell:** Usually tin-plated steel for EMI/RFI shielding. * **Contacts:** Gold-plated copper alloy for high conductivity and corrosion resistance. ### B. The Ribbon Cable * **Type:** Flat Ribbon, Gray with a red edge (Polarity indicator). * **Conductors:** 37 AWG 28 stranded wires. * **Insulation:** PVC (Polyvinyl Chloride). * **Pitch:** 0.050" (1.27mm) to match the Insulation Displacement Connectors (IDC). ### C. IDC Termination * The assembly uses **Insulation Displacement Technology**. The connector "bites" through the cable insulation to make contact with the wire, ensuring a gas-tight connection without stripping individual wires. --- ## 3. Technical Parameters | Parameter | Specification | | :--- | :--- | | **Current Rating** | 1A per contact | | **Voltage Rating** | 30V AC / 42V DC | | **Operating Temperature** | -20°C to +105°C | | **Shielding** | Unshielded (Standard Ribbon) | | **Color** | Gray Cable, Blue/Black Connectors | --- ## 4. Typical Applications * **Industrial Automation:** Connecting PLC (Programmable Logic Controllers) to I/O modules. * **Data Communication:** Serial data transfer in legacy server environments. * **Testing Equipment:** Routing multiple signals between a PCB and an external interface.