M23 Screw Lock Cable for Servo Motor Power and Encoder Feedback
Last updated: 7 September 2026
The M23 screw lock cable is made for servo motor power and encoder feedback.
One Connector Doing Two Very Different Jobs
A modern servo axis needs three motor phases and an earth, usually a brake pair, and somewhere between four and a dozen conductors for the feedback device. Running those down two separate cables means two connectors, two cable clamps and two strain reliefs on a moving arm. The M23 shell exists to put both jobs in one coupling: the larger contacts take the motor phases and the brake, while the remaining positions are given to the encoder or resolver and to the motor temperature sensor. One screw coupling, one clamp, one cable track slot.
Why the Feedback Pair Gets Its Own Shield
The motor phases are switched at several kilohertz by the drive and carry sharp edges; the feedback signal is an analogue sine/cosine track, a resolver excitation or a serial EnDat-style link that has to survive right next to them. Putting both in one jacket without separation is how you end up chasing intermittent position faults that only appear under load. The feedback group is therefore wrapped in its own foil or braid, and the whole bundle sits under an overall braid that is clamped to the metal shell at both ends. Getting that separation wrong is far more expensive than the cable.
The Pinout Is the Hard Part, Not the Cable
There is no single M23 servo pinout. Power positions broadly follow the conventions described in IEC 61915 and the DESINA-style hybrid layouts, but which contact carries which phase, where the brake pair sits, and what the feedback positions are wired for vary between drive makers and even between motor frames from the same maker. Resolver, sin/cos incremental, absolute serial and commutation-track variants all land on different pins.
- Tell us the motor model and the drive model, or send the existing cable.
- State the feedback type: resolver, sin/cos 1 Vpp, absolute serial, or commutation only.
- Say whether the brake pair is needed, and whether the thermal sensor pair is a thermistor or a switch.
- Confirm the connector size and coding your motor uses, since M23 shells come in power and signal variants.
Cable Construction for Moving Axes
Where the axis moves, the jacket has to be a drag-chain grade PUR over a fine-stranded conductor, with the lay chosen for flexing rather than for static installation. Shield coverage should be high and the braid angle set so it does not open up under repeated bending. On a fixed machine base a PVC jacket is perfectly adequate and costs less. Length is usually driven by the cable track path rather than by straight-line distance, and it is worth measuring the track rather than guessing.
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Frequently Asked Questions
Which connector family does M23 Screw Lock Cable for Servo Motor Power and Encoder use?
It uses M23 circular, screw coupling.
What jacket material does M23 Screw Lock Cable for Servo Motor Power and Encoder use?
The jacket is Drag-chain PUR for moving axes, PVC for fixed runs.
What conductor does M23 Screw Lock Cable for Servo Motor Power and Encoder use?
Motor phases and earth, brake pair, feedback, temperature sensor.
| Category | Screw-Lock Molded Cable |
|---|---|
| Connector family | M23 circular, screw coupling |
| Function | Servo motor power plus encoder feedback in one connector |
| Feedback shielding | Separate shield over the feedback group, plus overall braid |
| Conductor groups | Motor phases and earth, brake pair, feedback, temperature sensor |
| Jacket options | Drag-chain PUR for moving axes, PVC for fixed runs |
| Connector variants | Power and signal shell sizes, straight or right angle |
| Pinout | Built to the motor and drive model supplied by the buyer |
| Length | Made to order |
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