The ALSR021B-010C-196BS-HI0SSN-CBN is Wittenstein’s cyber® dynamic linear actuator in the 22 mm frame size — a fully integrated, high-dynamic servo linear actuator combining a three-phase permanent magnet synchronous motor, precision ball screw with 1 mm spindle pitch, built-in linear guide with anti-rotation mechanism, and singleturn absolute BiSS C encoder in a single ready-to-install unit operating from a 48 VDC bus, providing 35 mm stroke in a compact sealed package with IP54 protection and integrated STO safety function for semiconductor, packaging, medical device, and precision assembly automation.
Available now at Atlantech Drives with worldwide express delivery and 12-month warranty — complete our quote form for pricing and availability.
What Is the ALSR021B-010C-196BS-HI0SSN-CBN?
The ALSR021B-010C-196BS-HI0SSN-CBN is a Wittenstein cyber® dynamic series linear actuator in the 22 mm outside diameter frame — the second smallest of the four cyber dynamic actuator sizes (17, 22, 32, 40 mm) — providing a fully integrated electromechanical linear motion axis as a direct maintenance-free alternative to pneumatic cylinders in precision positioning applications.
Decoding the part string: ALSR identifies the cyber dynamic linear actuator with closed pushing rod and standard design; 021 identifies the 22 mm frame size; B identifies the standard version; 010C identifies the 1 mm spindle pitch ball screw (force-optimised configuration — the 1 mm pitch prioritises peak force output over maximum linear speed, as opposed to the higher-pitch speed-optimised variant); 196BS identifies the 35 mm stroke; HI0SSN identifies the convection cooling and IP54 protection with standard cable outlet; CBN identifies the singleturn absolute BiSS C encoder feedback system.
The fully integrated design — servo motor, ball screw, linear guide, anti-rotation mechanism, and encoder in one sealed housing — eliminates the coupling between motor shaft and screw that represents the primary source of inertia mismatch, compliance, and assembly error in conventional motor-plus-screw axis arrangements. Material number 50016140-01-0 is Wittenstein’s internal reference for this specific configuration.
Key Technical Specifications
- Part Number: ALSR021B-010C-196BS-HI0SSN-CBN
- Material Number: 50016140-01-0
- Series: Wittenstein cyber® dynamic actuator L
- Frame Size: 22 mm outside diameter
- Motor Type: Three-phase permanent magnet synchronous motor
- DC Bus Voltage: 48 VDC
- Stroke: 35 mm
- Spindle Pitch: 1 mm (force-optimised)
- Feedback System: Singleturn absolute encoder, BiSS C interface
- Protection Class: IP54 (cable outlet side)
- Cooling: Convection (natural air cooling)
- Safety Function: STO (Safe Torque Off), SIL3
- Cable Technology: EMC-shielded single-cable (power + encoder in one cable)
- Positioning Accuracy: Up to 0.05 mm
- Repeatability: Up to 0.01 mm
- Lubrication: Permanent (maintenance-free)
- UL Approval: No
- EPLAN: Available (macro files for electrical design integration)
- Rockwell Encompass: Compatible (worldwide Encompass program partner)
Architecture & Design Overview
The ALSR021B-010C-196BS-HI0SSN-CBN implements Wittenstein’s cyber® dynamic actuator L architecture — the «L» variant featuring a closed pushing rod configuration with integrated linear guidance and anti-rotation mechanism that prevents the output rod from rotating during extension and retraction, enabling direct attachment of end-effectors (grippers, dispensing needles, press tools) without requiring external anti-rotation guides.
The 1 mm ball screw pitch in the force-optimised configuration converts motor torque to linear force with maximum mechanical advantage — at 1 mm pitch, one motor revolution produces 1 mm of linear travel, and the force multiplication from pitch reduction means the 22 mm frame motor generates substantially higher peak force than the equivalent speed-optimised 2 mm pitch variant at the same motor torque.
The singleturn absolute BiSS C encoder provides absolute position feedback within one motor revolution — with 1 mm pitch, absolute position is known within ±0.5 mm without homing at power-up within one pitch interval, requiring a reference move only for multi-revolution absolute position determination when the system has been moved unpowered. The EMC-shielded single-cable technology routes both motor power (U, V, W phases) and encoder signals (BiSS C differential) through a single drag-chain-compatible cable — reducing cable count by 50% versus separate power and encoder cable architectures, simplifying cable management in multi-axis systems and reducing connector count at the servo drive.
The integrated STO (Safe Torque Off) function removes gate drive power from the motor’s output stage on STO activation without removing DC bus power, achieving SIL3 safe shutdown in compliance with IEC 61800-5-2 — enabling integration with safety-rated emergency stop and guard door interlocking circuits without main contactor cycling.
Typical Industrial Applications
The ALSR021B-010C-196BS-HI0SSN-CBN’s 22 mm frame, 35 mm stroke, and force-optimised 1 mm pitch make it the correct specification for high-force, short-stroke precision positioning axes in confined machine spaces.
In semiconductor die bonding and wire bonding machines, the 22 mm actuator drives the Z-axis bonding head through the 35 mm approach-bond-retract cycle at cycle rates that pneumatic cylinders cannot achieve with equivalent position accuracy — the servo-controlled approach speed, contact force, and retract speed are programmed in the simco® drive rather than mechanically adjusted, enabling rapid format changes between bond heights without mechanical adjustment. Electronic component assembly machines — SMT placement, selective soldering, dispensing — use the ALSR021B-010C-196BS-HI0SSN-CBN for Z-axis approach and pressing functions where the 35 mm stroke covers the full component height range and the 1 mm pitch provides the force resolution required for controlled-force component pressing.
Medical device assembly systems requiring ISO 13485-compliant traceability of assembly parameters use the actuator’s simco® drive integration to log force and position data for each assembly cycle — replacing pneumatic press operations where force and position cannot be measured and recorded without additional instrumentation. Pharmaceutical dosing and dispensing systems use the ALSR021B-010C-196BS-HI0SSN-CBN for syringe plunger actuation and valve needle actuation where dispensed volume is controlled by precise stroke position — the 0.01 mm repeatability translates directly to dispensed volume repeatability without volumetric feedback sensors.
Frequently Asked Questions
Q: What servo drive is required to operate the ALSR021B-010C-196BS-HI0SSN-CBN, and can it be controlled by a third-party drive with BiSS C encoder input?
A: Wittenstein’s simco® drive series is the primary recommended drive for the cyber® dynamic actuator L, providing pre-configured motor parameters, integrated fieldbus interfaces (EtherCAT, PROFINET, EtherNet/IP, CANopen), and optimised current control for the 48 VDC bus voltage. Third-party servo drives with 48 VDC bus capability and BiSS C encoder input can also operate the ALSR021B-010C-196BS-HI0SSN-CBN — the drive must support the motor’s three-phase permanent magnet synchronous motor type and be configurable with the motor’s electrical parameters (pole count, rated current, encoder resolution). Contact Wittenstein or Atlantech Drives for motor parameter data sheets for third-party drive integration.
Q: Does the singleturn BiSS C encoder require a homing cycle at power-up to establish absolute position over the full 35 mm stroke?
A: Yes, for full-stroke absolute position. The singleturn BiSS C encoder provides absolute position within one motor revolution (corresponding to 1 mm of linear travel at the 1 mm spindle pitch) — the drive knows the position within the current 1 mm pitch interval absolutely without homing, but does not know which pitch interval (0–1 mm, 1–2 mm… 34–35 mm) the actuator is in after unpowered movement. A reference move to a hard stop or proximity sensor establishes the full-stroke absolute position reference. If the application requires full absolute position without homing across power cycles, specify the multiturn absolute encoder variant of the cyber® dynamic actuator L available on larger frame sizes.
Q: Can the ALSR021B-010C-196BS-HI0SSN-CBN replace an existing pneumatic cylinder with 35 mm stroke in a machine retrofit?
A: Yes — this is one of the primary cyber® dynamic actuator applications. The mechanical retrofit requires mounting the actuator in the pneumatic cylinder’s position (verify the mounting flange dimensions against the actuator’s dimensional drawing), connecting the pushing rod to the existing end-effector, and replacing the pneumatic control valve and flow controls with a simco® drive and servo controller. The servo retrofit eliminates compressed air consumption for the axis, enables programmable force and position control replacing fixed pneumatic force and mechanical stops, and provides data logging capability for process quality documentation that pneumatic cylinders cannot provide.
Do you need more references from this brand? Explore our full catalog of Wittenstein here: https://atlantechdrives.com/manufacturers/wittenstein/
