SIEMENS 6XV1440-2KH32 OP Communications Cable | PROFIBUS / MPI / PPI Interface Platform
Engineering Background
The SIEMENS 6XV1440-2KH32 is a purpose-engineered operator panel (OP) communications cable designed for direct interconnection between SIMATIC HMI operator panels and SIMATIC S7/S5 PLCs via PROFIBUS, MPI, or PPI protocols. Developed under Siemens’ SIMATIC NET infrastructure, this cable eliminates the need for intermediate adapters in most standard OP-to-controller topologies, reducing wiring complexity and potential signal degradation points in demanding industrial environments.
Product Positioning
Targeted at automation engineers and system integrators who require a plug-and-play, specification-compliant interconnect for SIMATIC OP/TP panels, the 6XV1440-2KH32 is the OEM-specified cable for a wide range of Siemens HMI devices. Its pre-terminated, shielded construction ensures EMI immunity and repeatable signal integrity across the full cable length — critical in environments with variable-frequency drives, servo systems, and high-density I/O racks.
Complete Technical Specifications
- Part Number: 6XV1440-2KH32
- Manufacturer: SIEMENS AG (SIMATIC NET)
- Cable Type: OP Communications Cable (Pre-terminated)
- Protocol Compatibility: PROFIBUS DP/FMS, MPI (Multi-Point Interface), PPI (Point-to-Point Interface)
- Connector Type: Sub-D 9-pin (RS-485 standard) — both ends, unless otherwise specified by variant
- Cable Length: 3.2 m (as indicated by suffix -2KH32; verify datasheet for exact length)
- Shielding: Braided copper shield with drain wire — full-length EMI protection
- Conductor Configuration: Twisted-pair, impedance-matched for RS-485 / PROFIBUS signaling
- Characteristic Impedance: 150 Ω (PROFIBUS compliant)
- Operating Temperature: -20 °C to +70 °C
- Weight: Approx. 200 g
- Compliance: CE, RoHS; PROFIBUS International certified
- MLFB / Order Number: 6XV1440-2KH32
Proven Application Environments
- SIMATIC OP7, OP17, OP27, OP37 operator panels connected to S7-300 / S7-400 CPUs via MPI port
- SIMATIC TP170, TP270, TP370 touch panels in PROFIBUS DP master/slave topologies
- S7-200 PLC ↔ OP panel communication via PPI protocol
- Panel PC / IPC connections requiring RS-485 PROFIBUS physical layer
- Machine tool control cabinets, packaging lines, conveyor systems, and process automation cells
- Retrofit and upgrade projects replacing legacy S5 OP connections with S7-compatible interfaces
Engineering Advantages
- OEM Pre-terminated: Factory-assembled connectors eliminate field crimping errors and ensure consistent pin-out compliance with Siemens wiring standards.
- Full EMI Shielding: Braided shield + drain wire construction suppresses radiated and conducted interference — essential in VFD-dense panels.
- Protocol Flexibility: Single cable SKU supports PROFIBUS DP, MPI, and PPI — reduces spare-parts inventory complexity.
- Plug-and-Play Integration: No additional termination resistors or bus connectors required for point-to-point OP-to-PLC links.
- Siemens Ecosystem Certified: Validated for use with STEP 7, TIA Portal, and WinCC Flexible HMI software environments.
- Compact Form Factor: Lightweight and flexible jacket facilitates routing in tight cabinet layouts without exceeding minimum bend radius.
System Architecture & Signal Flow
In a typical deployment, the 6XV1440-2KH32 connects the 9-pin Sub-D port on the SIMATIC OP/TP panel directly to the MPI/PROFIBUS port on the S7 CPU or CP communications processor. The cable carries RS-485 differential signaling at up to 12 Mbit/s (PROFIBUS DP) or 187.5 kbit/s (MPI/PPI), with the shield terminated at the panel end to chassis ground per Siemens grounding guidelines. In multi-node PROFIBUS segments, this cable serves as the drop cable from the bus connector to the OP panel, with the bus connector providing the through-bus and termination resistor switching.
Signal path: PLC CPU MPI/DP Port → 6XV1440-2KH32 → OP Panel Sub-D Port → HMI Runtime (WinCC Flexible / STEP 7 Micro/WIN)
Sourcing & Quality Verification
- Origin: Sourced from authorized Siemens distribution channels and verified surplus inventory with full traceability.
- Inspection Protocol: Each unit undergoes visual inspection of connector shells, pin integrity, shield continuity, and jacket condition prior to dispatch.
- Authenticity Markers: Genuine Siemens cables carry laser-etched part numbers on the cable jacket and molded connector housings — counterfeit indicators include blurred markings, mismatched shell colors, and non-standard pin plating.
- Documentation Available: Siemens product datasheet, CE declaration of conformity, and RoHS compliance certificate available upon request.
- Warranty: 12-month operational warranty against manufacturing defects; return/exchange policy applies.
Procurement Process
- Step 1 — Inquiry: Submit your BOM or part number via email to support@konmask.com or WhatsApp +0086 19859288691 for real-time stock confirmation and lead time.
- Step 2 — Quotation: Receive a formal quotation within 1 business day including unit price, quantity available, shipping options (DHL / FedEx / sea freight), and estimated delivery.
- Step 3 — Order Confirmation: Place order via the Konmask.com storefront or via proforma invoice for bank transfer / L/C payment.
- Step 4 — Dispatch & Tracking: Orders are packed with anti-static protection and dispatched within 1–3 business days. Full tracking number provided upon shipment.
- Step 5 — After-Sales Support: Technical support available for installation verification, protocol configuration, and compatibility queries.
Technical FAQ
Q: Is the 6XV1440-2KH32 compatible with S7-1200 / S7-1500 PLCs?
A: The S7-1200 and S7-1500 use PROFINET (Ethernet-based) as their primary HMI interface. The 6XV1440-2KH32 is designed for MPI/PROFIBUS DP physical layer and is not directly compatible with PROFINET ports. For S7-1200/1500, use a PROFINET cable or an MPI/DP-to-PROFINET gateway.
Q: Can this cable be used on a PROFIBUS segment with multiple nodes?
A: Yes, as a drop cable from a PROFIBUS bus connector (e.g., 6ES7972-0BA52-0XA0) to the OP panel. The bus connector handles segment termination; the 6XV1440-2KH32 carries the drop signal only.
Q: What is the maximum cable length for reliable MPI communication?
A: Per Siemens MPI specification, total segment length at 187.5 kbit/s is up to 50 m. The 6XV1440-2KH32 at 3.2 m is well within this limit for point-to-point OP connections.
Q: Is a bus termination resistor required when using this cable?
A: For point-to-point connections (PLC ↔ single OP panel), the termination is typically handled by the PLC’s MPI port and the OP panel’s internal termination. No external resistor is required for the cable itself.
Q: Do you offer custom cable lengths?
A: We stock the standard OEM length (6XV1440-2KH32 = 3.2 m). For custom lengths, contact us — we can source alternative SIMATIC NET cable variants or advise on extension options.
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