SIGNAL CONNECTOR 17 PINS 6FX2003-OSA17 6FX2 003-OSA17 6FX2OO3-OSA17

Siemens 6FX2003-0SA17 | MOTION-CONNECT 17-Pole Signal Connector Kit — Male Thread, Pin Contacts 0.08–0.56mm², Dual Cable Terminations, for Servo Encoder/Signal Cable Field Assembly

Part Number: 6FX2003-0SA17

Manufacturer: Siemens AG (Slovakia)

Product Line: MOTION-CONNECT — Servo Cable Accessories

Product Type: Signal connector kit (field-assembly, 17-pole)

Connection Type: Male thread (external thread pin — Steckergehäuse mit Außengewinde)

Pole Count: 17 poles

Kit Contents:

• 1 × 17-pole insulator housing (male thread / pin side)
• 12 × pin contacts, 0.08–0.22 mm² wire range
• 17 × pin contacts, 0.20–0.56 mm² wire range
• 1 × cable termination (strain relief), cable diameter 6.5–10mm
• 1 × cable termination (strain relief), cable diameter 10.1–13mm 

Overview

The Siemens 6FX2003-0SA17 is a field-assembly connector kit from the MOTION-CONNECT accessory range — the collection of connectors, contact elements, and cable termination hardware that allows maintenance engineers and system integrators to fabricate or repair servo signal cables to exact lengths, rather than being limited to Siemens's pre-assembled cable catalogue.

In a SINUMERIK or SINAMICS servo installation, signal cables carry encoder feedback, brake control, temperature sensor, and other low-level signals between the servo motor and the drive amplifier or CNC module.

These cables are ordinarily purchased as pre-assembled units with the connectors already installed, tested, and shielded — the quickest and most reliable approach for a new machine build.

But machines that have been running for years accumulate situations where a pre-assembled cable is not the right answer: the machine was moved and the cable was damaged beyond a short repair, the original cable was custom-routed through a tight cable tray and a standard-length replacement will not fit, or the cable needs to be extended and no pre-assembled extension is available in the right length.

For all of these situations, the 6FX2003-0SA17 provides the connector end — the 17-pole male connector assembly that mates with the motor-side or drive-side socket of the signal cable connection.

The kit includes the connector housing, two sizes of pin contacts to accommodate the range of wire gauges found in MOTION-CONNECT signal cables, and two cable strain-relief terminations covering cable outer diameters from 6.5mm up to 13mm.

With this kit and the appropriate cable (from the MOTION-CONNECT cable range or equivalent), the engineer builds a replacement cable to the exact length the installation needs.

Key Specifications

The MOTION-CONNECT Accessory System — What It Covers

Siemens's MOTION-CONNECT programme covers the complete cable and connector ecosystem for servo drive and CNC installations.

The 6FX2003 series within MOTION-CONNECT is specifically the signal connector (Signalstecker) family — circular connectors for signal cables as opposed to power connectors for motor power cables (which belong to separate series). 

The 17-pole configuration of the 6FX2003-0SA17 matches the pin count of specific connector types used in encoder feedback, combined encoder/brake, and other multi-signal cable applications on SINUMERIK and SINAMICS servo systems.

The 6FX2003-0SA17's 17 poles accommodate the multiple signal conductors that a complete servo motor feedback cable typically carries: the A, B, and N (reference) channel pairs for incremental encoder feedback (6 wires), the encoder supply (+5V or +15V and ground — 2 wires), a zero-volt reference, thermal sensor for motor overtemperature protection (2 wires), and parking brake signals (2 wires) — adding up quickly to a count that fits within a 17-pole connector.

The exact pin assignment depends on the specific motor and drive combination and is defined in the SINUMERIK/SINAMICS cable documentation for each application.

Two Contact Sizes — Matching Wire Gauge to Signal Type

The 6FX2003-0SA17 kit includes pin contacts in two wire gauge ranges, which is a practical necessity because servo signal cables are not uniform in conductor cross-section:

0.08–0.22mm² contacts (12 pieces): These fine contacts handle thin conductors — typically the signal pairs for encoder A/B/N channels, serial encoder data lines, and thermal sensor signals. In a shielded twisted-pair signal cable, the individual conductor cross-sections often fall in the 0.08–0.14mm² range.

Using undersized contacts with larger conductors, or oversized contacts with small conductors, produces unreliable crimps that fail under the vibration and thermal cycling of machine tool environments.

0.20–0.56mm² contacts (17 pieces): The larger contacts accommodate heavier conductors — encoder supply power wires (which may be 0.25–0.35mm² to limit supply voltage drop over cable length), brake supply wires, and other conductors carrying small currents over longer distances where slightly larger cross-section improves reliability.

The dual-contact supply allows one kit to serve a range of cable types across the MOTION-CONNECT signal cable family without requiring separate connector kits for different wire gauges.

Two Cable Strain Reliefs — Accommodating Different Cable Diameters

The inclusion of two cable strain-relief terminations (6.5–10mm and 10.1–13mm outer diameter ranges) reflects the variety of MOTION-CONNECT signal cables in terms of outer diameter:

Thinner signal cables (encoder feedback only, without brake or thermal conductors) typically have outer diameters in the 6.5–9mm range — the smaller strain relief fits these.

Combined cables (encoder + brake + thermal in one jacket) and cables with additional conductors or heavier shielding may reach 10–13mm outer diameter — the larger strain relief accommodates these.

Having both strain reliefs in the kit means the engineer selects the appropriate termination for the specific cable at assembly time, rather than ordering a separate accessory part before beginning the repair.

FAQ

Q1: Is the 6FX2003-0SA17 a field-assembly kit or a finished connector?

It is a field-assembly kit — the components for assembling a connector, not a finished, ready-to-use connector. The engineer uses the included housing, pin contacts, and strain relief to build the connector at the cable end.

This requires crimping tools suitable for the specific pin contact sizes (0.08–0.22mm² and 0.20–0.56mm²), connector assembly knowledge, and familiarity with the specific pin assignment for the application.

For engineers who assemble their own cables regularly, the kit is straightforward. For occasional use, Siemens's pre-assembled cable catalogue (6FX2 and 6FX5 series cables) provides finished, tested alternatives.

Q2: What crimping tool is required for the pin contacts in this kit?

The Siemens MOTION-CONNECT documentation specifies the appropriate crimp tools for each contact size.

For contacts in the 0.08–0.22mm² range, a precision crimp tool with the correct die size for the specific contact geometry is required — standard general-purpose crimp tools are typically not suitable for contacts this small. 

For the 0.20–0.56mm² contacts, a compatible die in a standard industrial crimp tool handles the larger range.

The specific tool catalog numbers are listed in Siemens's MOTION-CONNECT cable assembly documentation.

Q3: Where is this 17-pole connector used — on the motor side or the drive side of the cable?

The 6FX2003-0SA17's male-thread pin configuration (external thread, pin contacts) typically corresponds to the connector that mates with the female-socket connection on the motor or the drive amplifier — the specific side depends on the motor and drive model. SINUMERIK and SINAMICS system documentation provides the mating connector gender and thread type for each motor and drive interface.

The 6FX2003 series as a whole covers various connector configurations; the -0SA17 variant's thread and pin orientation match specific motor feedback interfaces.

The mating cable connector (with socket contacts) belongs to the 6FX2003 series with a socket/coupling designation.

Q4: Can this connector be used with non-Siemens motors and drives, or only within the Siemens SINUMERIK/SINAMICS ecosystem?

The connector's physical format — a 17-pole circular connector with a specific thread type — is a standard industrial connector format.

If a non-Siemens motor or drive uses the same physical connector interface (same thread type, same pole count, same contact layout), the 6FX2003-0SA17 is mechanically compatible. 

However, the pin assignment for non-Siemens equipment would need to be determined from that equipment's documentation, and signal compatibility (voltage levels, signal types) must be verified independently.

Within the Siemens ecosystem, the connector interfaces and pin assignments are fully documented in the MOTION-CONNECT and SINUMERIK system documentation.

Q5: The kit contains 17 pin contacts in one range and 12 in another — does that mean not all 17 poles use the same contact size?

Correct. The 17-pole housing accommodates up to 17 contacts, but a specific cable application may use different contact sizes in different poles depending on the conductor gauges.

The kit provides 12 contacts for fine conductors (0.08–0.22mm²) and 17 contacts for medium conductors (0.20–0.56mm²), covering the population of contacts in a typical MOTION-CONNECT signal cable without requiring the engineer to pre-sort contacts.

In any given assembly, the engineer selects the appropriate contact size for each individual conductor, using the small contacts for encoder signal pairs and the larger contacts for supply and brake conductors — the kit's contents are sized to cover both needs in one pack.