AUTOTECH SAC-RL100-M11 Resolver

Product Details

SAC-RL100-M11 Product Description

The AUTOTECH SAC-RL100-M11 is a precision resolver engineered for energy-conscious motor control and high-throughput production environments. Designed to integrate seamlessly into the RL100 servo system architecture, this resolver delivers accurate rotor position and velocity feedback that enables servo drives and motion controllers to operate at peak efficiency — eliminating unnecessary torque corrections, reducing reactive current draw, and minimising thermal stress across the drive chain. In smart factory deployments where energy cost and equipment uptime are primary KPIs, the SAC-RL100-M11 provides the closed-loop sensing foundation that makes measurable efficiency gains possible.

In a fully integrated smart production line, the SAC-RL100-M11 resolver sits at the heart of the feedback loop that governs energy-efficient motion. When paired with an AUTOTECH RL100 servo drive, the resolver's high-resolution sine/cosine output allows the drive to execute precise field-oriented control (FOC), dramatically reducing the reactive power component that would otherwise manifest as heat and wasted electrical energy. This is especially critical in multi-axis systems where cumulative inefficiency across six or more axes can add thousands of kilowatt-hours to annual energy bills.

At the controller level, a Siemens S7-1500 PLC or equivalent motion controller reads interpolated position data from the resolver via the servo amplifier's encoder interface, enabling synchronised multi-axis coordination without over-torquing individual motors. The PLC's energy management function blocks can monitor per-axis power draw in real time, flagging axes where abnormal resolver signal deviation indicates bearing wear or winding degradation — a key input for predictive maintenance scheduling.

On the power supply side, an AUTOTECH or compatible 24 VDC industrial power supply feeds the resolver excitation circuit. Because the SAC-RL100-M11 draws less than 2 W in excitation, it imposes negligible load on the bus — an important consideration in dense I/O cabinets where thermal management is constrained. Alongside the resolver, AUTOTECH I/O expansion modules collect digital and analogue signals from limit switches, temperature sensors, and pressure transducers, feeding the PLC with the full plant-floor picture needed for load-adaptive control.

For variable-speed applications such as conveyor drives and pump systems, the SAC-RL100-M11 works in tandem with variable frequency drives (VFDs) — for example, an ABB ACS880 or Siemens SINAMICS G120 — where resolver feedback enables sensorless vector control to be upgraded to full closed-loop vector control, yielding 3–8% additional energy savings at partial load. The resolver signal is conditioned by an R/D converter module (resolver-to-digital), such as the AUTOTECH RDC-11 interface card, before being passed to the drive's DSP for real-time commutation.

At the supervisory level, a Wonderware InTouch HMI or Siemens WinCC SCADA platform visualises energy consumption trends per production cell. Resolver-derived velocity and position data, aggregated through OPC-UA communication modules, feeds energy dashboards that allow process engineers to identify idle-running motors, optimise ramp profiles, and schedule preventive shutdowns during low-demand periods — all without interrupting production throughput.

The fundamental value of the AUTOTECH SAC-RL100-M11 in an energy optimisation strategy lies in its ability to provide the servo system with accurate, noise-immune position feedback under harsh industrial conditions. Unlike optical encoders that are susceptible to contamination and vibration-induced signal loss, the resolver's inductive operating principle makes it inherently robust in environments with coolant mist, metal swarf, and high electromagnetic interference — conditions common in CNC machining centres, stamping presses, and automated welding lines.

When the servo drive receives clean, accurate feedback from the SAC-RL100-M11, it can execute tighter speed and torque regulation loops. This translates directly into reduced overshoot, fewer correction pulses, and lower RMS current draw — all of which reduce I²R losses in motor windings and cabling. In a 10-axis machining centre running two shifts per day, this efficiency improvement can reduce motor-related energy consumption by 8–15% annually, depending on duty cycle and load profile.

From a thermal management perspective, lower I²R losses mean less heat generated in the motor and drive cabinet. This reduces the duty cycle of cabinet cooling fans and air conditioners — secondary energy consumers that are often overlooked in energy audits. In facilities operating in high-ambient-temperature regions, this thermal benefit also extends motor insulation life and reduces the frequency of drive IGBT replacements.

For production line rhythm (takt time) optimisation, the resolver's high update rate enables the motion controller to execute faster settling times at each positioning step. Shorter settling times mean higher throughput without increasing motor speed — a key lever for improving OEE (Overall Equipment Effectiveness) without additional energy input. Combined with predictive maintenance alerts triggered by resolver signal quality degradation, unplanned downtime is reduced, keeping the line running at its designed energy-per-part ratio.

All units are shipped from in-stock inventory, pre-tested against AUTOTECH factory acceptance criteria, and covered by a 12-Month Warranty from the date of delivery. Each SAC-RL100-M11 undergoes excitation impedance verification, transformation ratio measurement, and insulation resistance testing before dispatch, ensuring that the unit installed on your production line performs to specification from day one.

Q1: How does the SAC-RL100-M11 contribute to measurable energy savings in a servo system?The resolver provides high-accuracy rotor position feedback that allows the servo drive to execute field-oriented control with minimal reactive current. By reducing unnecessary torque corrections and lowering RMS current draw, the system achieves 8–15% lower motor energy consumption in typical two-shift production environments. The low excitation power draw (<2 W) also ensures the resolver itself adds negligible load to the control bus.

Q2: Is the SAC-RL100-M11 compatible with third-party servo drives and PLCs outside the AUTOTECH RL100 series?Yes. The SAC-RL100-M11 outputs standard sine/cosine resolver signals compatible with any servo drive or motion controller equipped with a resolver input interface or an external R/D converter. It has been validated with Siemens SINAMICS, ABB ACS, and Mitsubishi MR-J series drives, as well as Siemens S7 and Allen-Bradley ControlLogix PLC platforms. Confirm the excitation frequency range (2–10 kHz) and transformation ratio (0.5) with your drive supplier before installation.

Q3: What is the recommended replacement or upgrade path if my existing resolver is degraded?The SAC-RL100-M11 is a direct form-fit-function replacement for resolvers in the AUTOTECH RL100 mechanical envelope. Before replacement, verify the shaft diameter, flange pattern, and connector pinout against your existing unit. If upgrading from a lower-accuracy resolver, recalibrate the drive's resolver offset parameter after installation. AUTOTECH technical documentation and our support team can provide pinout cross-reference tables on request.

Q4: What does the 12-Month Warranty cover, and how is the pre-shipment test conducted?The 12-Month Warranty covers manufacturing defects in materials and workmanship from the date of delivery. Each unit is tested for excitation impedance, transformation ratio accuracy, insulation resistance (>100 MΩ at 500 VDC), and signal output symmetry prior to shipment. Units that fail any parameter are quarantined and not dispatched. In the event of a warranty claim, AUTOTECH provides a replacement unit from in-stock inventory, minimising production downtime.