6FX5002-2EQ10-1BF0 | Siemens Absolute Encoder Signal Cable — 15m / M23 + 25-Pin Sub-D / MOTION-CONNECT 500 / 16 Conductors / UL/CSA
Absolute Encoder Signal Cable at 15m — Fixed Servo Drive Installations
The 6FX5002-2EQ10-1BF0 is a 15-metre pre-assembled signal cable from Siemens' MOTION-CONNECT 500 Basic Line — the fixed-installation cable for connecting the absolute encoder integrated in SIMOTICS servo motors to the SINAMICS drive's encoder input interface. The 15m length serves medium-distance drive installations where the servo motor is located approximately 12–15 metres from the drive cabinet via fixed cable routing.
The MOTION-CONNECT 500 designation defines this as a Basic Line cable — engineered for static (fixed) or predominantly fixed installation, not for continuous cable track service. MOTION-CONNECT 500 cables represent the cost-effective choice for servo installations where the cable route does not undergo repeated flexing.
Key Specifications
| Parameter |
Value |
| Length |
15m |
| Conductors |
3×(2×0.14mm²) C + 4×0.14 + 2×0.5 + 4×0.23 |
| Outer Diameter |
9.9mm |
| Voltage Rating |
30V |
| Connectors |
M23 full thread + 25-pin Sub-D |
| Series |
MOTION-CONNECT 500 |
| Standard |
UL/CSA, DESINA |
Absolute Encoder — What This Cable Connects
An absolute encoder integrated in the motor provides complete position information — shaft angle within one revolution for single-turn types, plus accumulated turn count for multi-turn versions. Unlike incremental encoders that count pulses from a reference mark, the absolute encoder retains position data even after power interruption.
The 6FX5002-2EQ10 cable serves the EnDat interface — Siemens' adopted high-speed serial encoder protocol for absolute encoders integrated into SIMOTICS servo motors:
Serial communication channel (3×2×0.14mm² pairs): The EnDat protocol transmits absolute position data bidirectionally on differential signal pairs — the drive sends clock pulses and commands, the encoder responds with position data and diagnostic information.
Auxiliary conductors (4×0.14mm²): Supplementary signals and drive-specific communication lines for encoder identification, diagnostic readout, and thermal monitoring.
Supply conductors (2×0.5mm²): Power supply for the encoder electronics within the motor — the encoder requires 5V DC at low current, supplied through the 0.5mm² conductors.
High-resolution track conductors (4×0.23mm²): Additional signal channels for high-resolution position tracks — providing the finer angular resolution beyond the serial channel's base resolution.
Applications
SINAMICS S120 with SMC20 or on-board encoder interface: CNC machining centres and industrial servo drives using SINAMICS S120 with absolute encoder feedback for direct homing-free axis operation — no reference point travel required at machine startup.
SINUMERIK CNC axis drives: SINUMERIK-controlled machine tool axes where the 15m cable run from drive cabinet to motor suits the machine's physical layout.
High-precision servo positioning: Servo axes requiring absolute position retention through power-off — the absolute encoder eliminates startup homing sequences, improving production uptime and machine throughput.
FAQ
Q1: What is the MOTION-CONNECT 500 maximum cable track traversing distance — and when must 800PLUS be used instead?
MOTION-CONNECT 500 cables are tested for cable track traversing distances up to 5 metres. For applications where the cable track moves more than 5 metres in continuous service, the MOTION-CONNECT 800PLUS Dynamic Line equivalent (6FX8002-2EQ10) is required. For static or slowly moving installations within the 5m limit, MOTION-CONNECT 500 is both technically and commercially appropriate.
Q2: What is the advantage of absolute encoder feedback vs incremental encoder for CNC servo axes?
An absolute encoder retains shaft position data through power cycles — the SINAMICS drive knows the exact axis position immediately at power-on. An incremental encoder loses count on power removal, requiring a reference homing movement before the axis can operate in position-controlled mode. Absolute encoder axes eliminate the startup homing cycle, reducing machine setup time — particularly valuable in multi-axis machines where all axes must home before production can begin.
Q3: What SINAMICS encoder interface module connects to 6FX5002-2EQ10 cables?
The 25-pin Sub-D connector mates with the SINAMICS S120 SMC20 Sensor Module's encoder input. The SMC20 processes the EnDat absolute position data and feeds it to the SINAMICS drive control. Alternatively, some SINAMICS S120 Motor Modules have an integrated encoder input that accepts the same 25-pin Sub-D interface. Confirm from the SINAMICS S120 hardware configuration documentation which interface module applies for the specific drive configuration.
Q4: Can 6FX5002-2EQ10-1BF0 (15m) replace a shorter cable in the same installation?
Only if the longer cable can be routed without violating minimum bending radius requirements and without creating coiled excess cable that creates an EMC antenna loop. In most cases, selecting the correct cable length for the installation is preferable to routing a longer cable with excess. If a 15m cable is already installed and needs replacement, confirm the routing still accommodates the 15m length before ordering.
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