Signal Siemens pLC Connector 12 Pin 12 Pole Insulator 6FX2003-0SU12

Siemens 6FX2003-0SU12 Signal Connector

Overview

The 6FX2003-0SU12 is a 12-pole signal connector supplied as a union nut socket connector set. Siemens product data identifies it with 1 × 12-pole insulator, 12 contacts for 0.08–0.22 mm² conductors, 12 contacts for 0.20–0.56 mm² conductors, and 2 cable terminals for 6.5 to 10 mm and 10.1 to 13 mm cable diameters, packed as 1 unit.

This makes it a connector assembly for signal cable termination rather than an active electronic component.

This type of connector is relevant anywhere the original signal cable structure must be preserved.

In motion and control systems, the connector is often the point where conductor size, cable diameter, and serviceable assembly all have to match the original hardware exactly. Using the correct connector set helps retain the intended cable fit and terminal compatibility without altering the signal-side connection format.

Technical Data

Application Value

This connector fits signal-cable assembly, motion-control harness replacement, encoder or feedback-related cable work, and general Siemens control-cable service where the original connector family must be maintained. Because the package includes both contact-size groups and both cable-terminal ranges, it supports practical cable rebuilding without mixing unmatched connector parts.

In service work, exact connector matching is important because a cable assembly has to fit mechanically as well as electrically. Pole count alone is not enough: the conductor-size and cable-diameter ranges also have to match the cable being terminated.

This connector set addresses those requirements directly in the supplied contents.

Selection Notes

The key points are the 12-pole layout, the socket-style union nut configuration, the two wire-size ranges, and the two supported cable-diameter ranges.

Those details decide whether the connector can be assembled correctly onto the existing cable and whether it will match the original connection structure.

FAQ

Q1: What exactly is 6FX2003-0SU12?
It is a 12-pole Siemens signal connector set in the union nut socket style.

Siemens lists it with an insulator, two contact-size groups, and two cable-terminal ranges, so it is intended for cable-end assembly or connector replacement rather than as a loose housing only.

Q2: Is this an active module or only a connector assembly?
It is a connector assembly, not an active module. The published product description covers the socket body, insulator, contacts, and cable terminals.

It does not function as a PLC module, sensor interface, or drive electronics component by itself.

Q3: Why are there two contact-size groups included?
Because the connector supports two conductor cross-section ranges: 0.08–0.22 mm² and 0.20–0.56 mm².

That matters in cable assembly, since the contact must match the wire size for correct crimping and stable long-term connection quality.

Q4: Why do the cable terminal ranges matter?
The cable terminals define which cable outside diameters the connector can clamp correctly.

Siemens lists 6.5 to 10 mm and 10.1 to 13 mm ranges, which helps ensure the cable is held securely and that the termination is mechanically stable after assembly.

Q5: What should be checked before ordering?
Check the installed connector code, confirm the system needs a 12-pole socket-style connector, verify the wire cross-section, and make sure the cable diameter falls into one of the listed terminal ranges.

Those are the key points for correct assembly fit.