Description
Key Technical Specifications
- Product Model: SAC-RL100-M11T
- Manufacturer: AUTOTECH CONTROLS
- Product Type: Resolver / rotary position sensor
- Product Family: RL100 resolver series
- Function: Absolute rotary position feedback
- Construction: Brushless rotary transformer with rotor and stator windings
- Power Supply: 24 VDC power group referenced
- Operating Temperature: 0°C to 60°C
- Humidity: 5% to 95% referenced
- Certification: UL referenced
- Origin: USA referenced
- Weight: Approximately 6 lb referenced — verify on nameplate
Product Introduction
On the machine floor, a resolver like the SAC-RL100-M11T usually shows up when a rotating shaft needs reliable position feedback — not when someone needs a PLC output card or a relay driver. The RL100 family is commonly associated with heavy-duty industrial position sensing, where shock, vibration, oil mist, coolant, temperature swings, and continuous mechanical duty can kill weaker feedback devices.
Why it matters: if the resolver fails or drifts, the control system may lose accurate shaft position, produce bad speed/angle feedback, generate following errors, or force the machine into a fault stop. For spare-parts planning, the real value is keeping a verified SAC-RL100-M11T unit available — with the correct mechanical mounting, shaft interface, and wiring termination — so a failed position sensor does not turn into extended downtime.
Troubleshooting Quick Reference
| Fault | Likely Cause | Quick Check | Fix |
|---|---|---|---|
| No position feedback | 24 VDC supply missing, broken cable, open resolver winding | Measure 24 VDC at power terminals; check continuity on resolver leads | Restore supply; repair/replace cable; verify winding continuity |
| Erratic position values | Loose coupling, shaft slip, damaged rotor/stator, EMI | Inspect mechanical coupling; check shielding and grounding | Tighten coupling; separate signal cables from power cables |
| Wrong angle or offset | Incorrect wiring phase, resolver-to-drive mismatch, calibration loss | Compare wiring diagram with drive/resolver interface | Rewire correctly; recalibrate; verify resolver-to-drive compatibility |
| Intermittent faults | Vibration, damaged connector, corroded pins, flexing cable | Wiggle-test connectors; inspect cable strain relief | Reseat/replace connectors; add strain relief; replace damaged cable |
| Machine alarms for encoder/resolver | Drive not recognizing feedback format or signal level | Check drive alarm text and resolver output levels | Confirm resolver output matches drive input requirements |
SAC-RL100-M11T
Application Scenarios & Pain Points
- Rotary position feedback on presses or packaging machines: The resolver must survive vibration, shock, oil mist, and repeated motion. The pain point is usually mechanical wear — coupling slip, bearing wear, or shaft misalignment — before the resolver electronics actually fail.
- Legacy Autotech Controls replacements: Older machines may still depend on RL100-family resolvers. The risk is ordering a similar Autotech part without confirming the full model number, termination, and mounting style.
- Motion control systems with resolver inputs: Drives and motion controllers expect specific excitation, output levels, and wiring. Swapping resolvers without checking the drive interface can create calibration or alarm problems.
- Harsh industrial environments: Coolant, solvents, humidity, and temperature swings can damage connectors, cables, and seals. The resolver itself may be fine while the termination or cable fails first.
- Surplus procurement risk: Some listings misclassify SAC–M11T as a controller or semiconductor module. That is misleading and can waste time during emergency maintenance.
