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RD77MS4

The RD77MS4 is a 4-axis ultra-high-speed positioning module for Mitsubishi MELSEC iQ-R series PLCs, designed for advanced multi-axis motion control applications requiring nanosecond-level synchronization. It supports complex interpolation and electronic cam functions, making it ideal for precision automation systems.

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Key Features & Specifications
Performance Specifications
Control Axes: 4 axes (simultaneous operation)

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

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

Control Modes:

Position / Speed / Torque control

Linear / Circular / Helical interpolation

Electronic cam (up to 64 cams)

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

Advanced Motion Functions
S-curve Acceleration/Deceleration: Smother motion profiles

Override Control: Real-time speed/torque adjustment

Dedicated Motion Commands: 50+ PLC instructions for flexible programming

Error Recovery: Automatic retry and dynamic braking

Connectivity & Integration
Network Support: CC-Link IE Field Network (via RJ71GF11-T2)

High-Speed I/O: 16 dedicated inputs (for limits, origin, etc.)

SSCNET III/H Interface: Direct servo drive connection (supports MR-J5 series)

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

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

Weight: 0.3kg