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RD77NS8

The RD77NS8 is an 8-axis high-performance positioning module for MELSEC iQ-R series PLCs, designed for large-scale motion control systems requiring multi-axis synchronization over CC-Link IE Field Network. It delivers sub-microsecond coordination for precision automation in industrial applications.

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Key Features & Specifications
Performance Specifications
Control Axes: 8 axes (independent/synchronized operation)

Positioning Speed: Up to 4Mpps (pulses per second) per axis

Synchronization Accuracy: ±100ns (network-wide)

Control Modes:

Position/Speed/Torque control

Linear/Circular/Helical interpolation

Electronic cam (128 cams max.)

Gear following & phase control

Feedback Support: 22-bit absolute encoder (MELSERVO-J5 compatible)

Network & Integration
Communication Protocol: CC-Link IE Field Network (1Gbps)

Servo Compatibility: Direct control of MR-J5 series servo drives

I/O Capacity: 32 virtual inputs/outputs (for limits/origin signals)

Data Exchange: Real-time status monitoring via PLC tags

Advanced Functions
Dynamic Motion Switching: Change profiles during operation

Vibration Suppression: Adaptive filter tuning

Collision Detection: Torque limit monitoring

Override Control: Adjust speed/torque in real time

Environmental & Physical
Operating Temperature: 0°C to 55°C

Protection Class: IP20

Weight: 0.35kg