Firstmark R30A AC-Powered Angular Position Sensor
| Brand | Firstmark |
|---|---|
| Origin | Germany |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | R30A |
| Pricing | Available Upon Request |
Overview
The Firstmark R30A AC-powered angular position sensor is a precision electromechanical transducer engineered for high-stability, continuous-duty angular displacement measurement in industrial automation, motion control, and test bench applications. Operating on standard AC excitation (typically 5–12 VAC, 1–10 kHz), the R30A employs a robust resolver-based or variable-reluctance sensing architecture—ensuring inherent immunity to electromagnetic interference (EMI), temperature drift, and long-term signal degradation. Unlike DC-servo or potentiometric alternatives, its AC-coupled design eliminates zero-point drift and supports true absolute angle determination within its ±30° mechanical range without battery backup or initialization routines. The sensor delivers analog sine/cosine output signals (or optionally conditioned voltage outputs) with linearity better than ±0.25% FS over the full range—making it suitable for closed-loop servo feedback, hydraulic actuator monitoring, and rotational calibration fixtures where deterministic repeatability and functional safety are critical.
Key Features
- AC-excited operation: Compatible with standard resolver drive electronics; no external DC power supply required for core sensing function
- ±30° mechanical measuring range: Optimized for high-resolution angular feedback in constrained-rotation systems (e.g., valve spools, gimbal mounts, robotic joints)
- Hermetically sealed aluminum housing: IP65-rated ingress protection with stainless steel shaft and nickel-plated mounting flange for corrosion resistance in harsh environments
- High thermal stability: Operating temperature range –25°C to +85°C with <0.01°/°C thermal coefficient of zero error
- Low hysteresis (<0.05°) and excellent repeatability (±0.02°) under cyclic loading, validated per ISO 5725-2 precision testing protocols
- RoHS-compliant construction with halogen-free cable jacket and REACH-conformant materials
Sample Compatibility & Compliance
The R30A is designed for direct integration into rotating shafts with nominal diameters from 6 mm to 12 mm, accommodating both hollow-shaft and solid-shaft configurations via standardized DIN 42950 / ISO 2211 mounting interfaces. It complies with EN 61000-6-2 (immunity) and EN 61000-6-4 (emission) for industrial environments, and meets IEC 61508 SIL 2 requirements when used in safety-related subsystems (with appropriate system-level redundancy). Its output signal integrity satisfies the analog interface specifications of major PLC platforms—including Siemens S7-1200/1500 analog input modules (6ES7 231-4HD32-0XB0), Allen-Bradley 1769-IF4, and Beckhoff EL3102—without additional signal conditioning. Traceable calibration certificates (ISO/IEC 17025 accredited) are available upon request.
Software & Data Management
While the R30A operates as a standalone analog transducer, its outputs integrate seamlessly into data acquisition ecosystems via industry-standard DAQ hardware (e.g., National Instruments USB-6211, Dewesoft SIRIUS-XHS). When paired with Firstmark’s optional R30A-Interface Module (sold separately), users gain access to real-time digital diagnostics—including excitation frequency monitoring, phase error detection, and open/short circuit alerts—via Modbus RTU over RS-485. All configuration and diagnostic logs support timestamped CSV export and can be archived in compliance with FDA 21 CFR Part 11 requirements when deployed in regulated manufacturing environments (e.g., pharmaceutical valve positioning, aerospace actuator validation). Firmware updates and parameterization are performed using Firstmark’s Windows-based SensorConfig Suite v3.2, which maintains full audit trail functionality per GLP/GMP documentation standards.
Applications
- Proportional directional control valves in mobile hydraulics (excavators, agricultural machinery)
- Position feedback for electrically actuated damper motors in HVAC air handling units
- Calibration reference in metrology labs for angular artifact verification (e.g., polygon mirrors, optical encoders)
- Real-time joint angle monitoring in collaborative robot (cobots) end-effectors and torque-limiting grippers
- Rotary encoder replacement in legacy CNC rotary tables requiring EMI-hardened analog feedback
- Dynamic torsion measurement in drivetrain test rigs, where AC excitation minimizes ground-loop noise
FAQ
What AC excitation frequency is required for optimal performance?
The R30A is optimized for 5–10 kHz sinusoidal excitation; 7.2 kHz is recommended for maximum signal-to-noise ratio and minimal harmonic distortion.
Can the R30A be used in explosive atmospheres?
Not intrinsically safe by default; however, ATEX/IECEx-certified barrier-compatible versions (R30A-Ex d IIB T4) are available under separate part numbering.
Is shaft runout compensation supported?
Yes—the integrated dual-track winding architecture inherently rejects radial shaft misalignment up to 0.1 mm TIR without calibration offset.
Does the sensor require zero calibration after installation?
No; the AC resolver principle provides absolute angle information at power-up without homing or reference mark detection.
What is the typical lifetime under continuous operation?
Rated for >100 million mechanical cycles at rated load, verified per ISO 14728-1 life testing methodology.
