ACS Motion Control SP+SAR-LT-4E Servo Drive Module

Product Details

SP+SAR-LT-4E Product Description

The ACS SP+SAR-LT-4E is a high-performance, system-ready servo drive module engineered for seamless integration within the ACS Motion Control SPiiPLUS distributed motion control architecture. Designed to operate as a native node within multi-axis servo systems, this drive delivers deterministic torque and velocity control across demanding industrial automation environments — from semiconductor wafer handling and flat-panel display manufacturing to precision medical device assembly and advanced packaging lines. Its architecture-native design eliminates the integration overhead typically associated with third-party drives, enabling engineers to deploy, tune, and commission axes faster while maintaining full system coherence across the entire motion platform.

The SP+SAR-LT-4E is built around ACS's proven SafeAxis architecture, incorporating hardware-level safety functions that align with IEC 61508 SIL 2 requirements. This makes it suitable for applications where personnel safety and process integrity must coexist with high-throughput motion performance. The drive communicates natively over the EtherCAT-based SPiiPLUS network, ensuring sub-millisecond synchronization with the central motion controller and all peer axes — a critical requirement in coordinated multi-axis gantry, SCARA, and delta robot configurations.

Every SP+SAR-LT-4E unit in our inventory has undergone full pre-shipment functional testing, including power stage verification, encoder interface validation, and communication handshake confirmation with SPiiPLUS controller nodes. Units are backed by a 12-Month Warranty covering manufacturing defects and functional failures, with global logistics support for rapid deployment to facilities in Asia, Europe, and North America.

The SP+SAR-LT-4E achieves its full performance potential when deployed as part of a cohesive SPiiPLUS motion control platform. At the controller layer, the ACS SPiiPLUS MC4U or SPiiPLUS EC motion controller serves as the central coordination node, issuing synchronized motion commands to all axis drives over the EtherCAT ring. The SP+SAR-LT-4E receives these commands with deterministic latency, enabling tight multi-axis interpolation essential for contouring and coordinated pick-and-place operations.

For power distribution, the ACS SP+PS power supply module provides the regulated DC bus voltage required by the SP+SAR-LT-4E and peer drives within the same cabinet. Proper bus capacitance and regenerative energy management are handled at the power layer, ensuring stable operation during rapid acceleration and deceleration cycles common in high-throughput automation.

At the I/O layer, the ACS SP+DIO digital I/O expansion module integrates directly into the SPiiPLUS network, providing additional discrete inputs and outputs for limit switches, home sensors, and interlock signals — all synchronized to the motion timeline without additional PLC overhead. For analog signal acquisition, the SP+AIO analog I/O module extends the platform's sensing capability to process variables such as force feedback, tension control, and pressure monitoring.

Communication gateway functions are handled by the ACS SPiiPLUS EtherCAT Master interface, which bridges the SPiiPLUS motion network to plant-level PROFINET or EtherNet/IP infrastructure, enabling seamless integration with Siemens S7 PLCs, Rockwell ControlLogix systems, or SCADA platforms without disrupting the real-time motion control loop. For HMI integration, ACS's SPiiPLUS MMI Application Studio provides a dedicated engineering environment for motion program development, axis tuning, and real-time oscilloscope diagnostics — reducing commissioning time significantly compared to generic HMI platforms.

In multi-axis gantry or SCARA configurations, the SP+SAR-LT-4E operates alongside additional SP+SAR single-axis or dual-axis variants, sharing the same EtherCAT segment and synchronization clock. This modular scalability allows engineers to expand axis count incrementally without redesigning the control architecture. For applications requiring functional safety beyond STO — such as Safe Limited Speed (SLS) or Safe Direction (SDI) — the ACS SP+SB safety board integrates directly with the drive to extend the safety function set while maintaining full motion performance.

Terminal block wiring and signal conditioning are simplified through the use of ACS SP+CB connector boards, which provide pre-wired breakout interfaces for encoder, motor power, and I/O connections — reducing panel wiring time and minimizing the risk of field wiring errors during installation and maintenance cycles.

Semiconductor & Electronics Manufacturing: In wafer handling, die bonding, and PCB drilling systems, the SP+SAR-LT-4E provides the sub-micron positioning repeatability and deterministic axis synchronization required for yield-critical processes. Its low-voltage architecture suits cleanroom-compatible cabinet designs where thermal management and EMI containment are paramount.

Medical Device Assembly: Precision dispensing, stent cutting, and catheter winding machines rely on coordinated multi-axis motion with integrated safety functions. The SP+SAR-LT-4E's SIL 2-rated STO function satisfies machine safety requirements under ISO 13849 and IEC 62061, enabling CE-marked machine designs without external safety relays on each axis.

Flat Panel Display (FPD) Manufacturing: Large-format gantry systems for glass substrate handling, laser scribing, and inkjet printing demand long-stroke linear motor control with nanometer-level position feedback. The SP+SAR-LT-4E's support for EnDat 2.2 and BiSS-C absolute encoders ensures position integrity across full travel without homing cycles after power restoration.

Advanced Packaging & Labeling Lines: High-speed pick-and-place, form-fill-seal, and servo-driven cam applications benefit from the drive's torque control bandwidth and EtherCAT synchronization, enabling electronic line shafting and virtual cam profiles that replace mechanical gearboxes and reduce changeover time.

Energy & Power Generation: Test bench automation for turbine blade inspection, generator winding machines, and valve actuator test systems require robust servo performance in industrial environments with elevated EMI. The SP+SAR-LT-4E's shielded architecture and CE certification support reliable operation in these demanding electrical environments.

Q1: Is the SP+SAR-LT-4E compatible with existing SPiiPLUS MC4U and SPiiPLUS EC controllers without firmware upgrades? The SP+SAR-LT-4E is designed as a native node within the SPiiPLUS EtherCAT-based architecture. Compatibility with specific controller firmware versions should be confirmed against the ACS compatibility matrix for your controller revision. In most cases, units shipped from our inventory are tested against current SPiiPLUS firmware releases, and we recommend aligning controller firmware to the version validated during our pre-shipment test. Our technical team can provide the firmware version used during testing upon request.

Q2: Can the SP+SAR-LT-4E be integrated into a mixed-axis system alongside standard (non-LT) SP+SAR variants on the same EtherCAT segment? Yes, the SPiiPLUS architecture supports mixed drive configurations on the same EtherCAT ring, provided bus voltage domains are properly isolated and the power supply architecture accounts for the different voltage requirements of LT (low-voltage) and standard variants. The motion controller manages axis-level parameters independently, so mixed configurations are fully supported at the software level. Physical cabinet design must ensure proper bus separation and regenerative energy routing between voltage domains.

Q3: What does the 12-Month Warranty cover, and what is the process for warranty claims on the SP+SAR-LT-4E? The 12-Month Warranty covers manufacturing defects, component failures, and functional non-conformance identified under normal operating conditions consistent with ACS Motion Control's published specifications. It does not cover damage resulting from incorrect installation, overvoltage events, or unauthorized modification. To initiate a warranty claim, contact NANKMOS at [email protected] with the unit serial number, purchase documentation, and a description of the observed fault. Our team will coordinate return logistics and provide a replacement or repaired unit within the agreed service timeline. Pre-shipment test records are retained for each unit to support fault analysis and warranty adjudication.