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RD77MS2

The RD77MS2 is a 2-axis synchronous positioning module for MELSEC iQ-R series PLCs, delivering ultra-high-speed motion control with nanosecond-level synchronization accuracy. Designed for advanced automation systems requiring precise multi-axis coordination, it supports linear/circular interpolation and electronic cam functions.

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Key Features & Specifications
Performance Specifications
Control Axes: 2 axes (simultaneous)

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

Synchronization Accuracy: ±10ns (axis-to-axis)

Control Modes:

Position/Speed/Torque control

Linear/Circular interpolation

Electronic cam (up to 64 cams)

Feedback: 22-bit absolute encoder support

Motion Control Functions
Advanced Curve Control: S-curve acceleration/deceleration

Override: Speed/torque adjustment during operation

Dedicated Instructions: 50+ motion commands (e.g., MELSERVO-J5 compatible)

Connectivity & Integration
Network Compatibility: CC-Link IE Field Network

I/O Points: 16 dedicated high-speed inputs (for limits/origin)

SSCNET III/H Interface: For direct servo drive connection

Environmental & Physical
Operating Temperature: 0–55°C

Vibration Resistance: 5.9m/s² (10–57Hz)

Weight: 0.25kg