Description

Allen‑Bradley 8851‑LC‑MT Resolver Interface Module

Technical Specifications

• Product Model: 8851‑LC‑MT
• Brand: Allen‑Bradley (Rockwell Automation)
• Warranty: One Year
• Input Voltage: 5 V DC backplane supply
• Operating Temperature: 0 °C ~ +60 °C
• Storage Temperature: ‑40 °C ~ +85 °C
• Response Time: Resolver position update cycle <250 μs
• Protection Class: IP20 plug‑in motion‑control module
• Accuracy Class: Industrial resolver position‑decoding grade
• Output Frequency: Not applicable
• Rated Current: Max 380 mA @5 VDC; power consumption 1.9 W
• Feedback Interface: Multi‑channel resolver excitation and position decoding
• Resolver Excitation: 7 V RMS, 4 kHz excitation signal
• Position Resolution: High‑resolution digital position output for motion‑controller backplane
• Diagnostics: Loss‑of‑signal, resolver coil‑fault detection, module self‑diagnostics, LED status indicators
• System Compatibility: Allen‑Bradley 8850 series multi‑axis motion‑control system
• Certifications: CE, UL/cUL
• Humidity: 5‑95 % RH, non‑condensing
• Weight: 0.33 kg
• Dimensions: 145 × 95 × 22 mm
• 

Product Overview

8851‑LC‑MT resolver interface module decodes analog resolver feedback signals into high‑resolution digital position‑data for Rockwell 8850 legacy multi‑axis motion‑control platform. It provides resolver excitation signal and monitors resolver coil health continuously. Detects resolver wiring open‑circuit / short‑circuit faults and reports fault status to motion‑controller host. This legacy motion‑control module is out‑of‑production; available units are refurbished and new‑old‑stock spare‑parts for metal‑forming‑machinery, heavy‑automation‑equipment maintenance and retrofit projects.

Application Notes

‑ Only compatible with 8850 motion‑control rack; cannot be used with Kinetix‑series drives. ‑ Check resolver wiring phase sequence and excitation‑wiring before commissioning. ‑ ESD anti‑static precautions required during module replacement. ‑ Typical deployment: metal‑forming‑press‑equipment, heavy‑duty automated‑machinery legacy motion‑control‑system spare‑part stocking.