MOTOR CONTROL · CURRENT FOCUS

FFU Group Control System

One-stop centralized monitoring for cleanroom fan filter units

System Overview

FFU (Fan Filter Unit) is the core equipment of cleanrooms. Rays-Power FFU group control system is fully in-house: gateway, driver board, communication board, PC console and cloud platform. A single gateway manages up to 300 FFUs with centralized monitoring, batch control, auto addressing and fault tracing.

Standard Modbus protocol integrates with touchscreens, PC consoles and cloud platforms with reliable communication; FOC vector control and active PFC deliver motor performance while meeting grid harmonic requirements.

System Topology

Host system → independent gateway uplinks (Ethernet / RS-485) → 5 downstream RS-485 zones × 60 RSP5021 slaves

Concept view connecting the FFU cloud, gateway, five zones and multiple fan filter units — Concept product rendering

Independent uplinks · Ethernet / RS-485Downstream · 5× RS-485 × 60 RSP5021 slaves

System Components

Four layers, fully in-house, closed-loop from hardware to software

Concept rendering of an FFU industrial gateway without internal circuitry — Concept product rendering

RSP5028 Gateway

System core · protocol bridge

Five independent downstream RS-485 zones support up to 60 RSP5021 slaves each; the gateway provides separate Ethernet and RS-485 uplink interfaces.

Downstream: 5× RS-485 zones × 60 units
Independent uplinks: Ethernet / RS-485
300 FFU per gateway
Auto addressing / clock sync / fault aggregation

RSP5020 Control Board

Display · control · comms

LED display for speed/power/current/pressure, 3-key operation, pressure sensing, Modbus communication.

LED status display + indicators
3 keys: on/off, speed, params
Pressure sensing (filter clog monitoring)
Time management / run records / fault history

Concept rendering of a brushless motor controller without internal circuitry — Concept product rendering

RSP5021 Motor Driver Board

FFU motor drive · RS-485 slave

FOC vector control + active PFC and 12+ fault protections; the slave communicates only through RS-485.

Slave communication: RS-485
FOC vector control, efficient & quiet
Active PFC power correction
0~1300 RPM / 0~150W
OC/OV/UV/stall/phase-loss/OT protection

FFU_Console (PC)

PC monitoring software

300-unit screen monitoring, batch control, CSV logging, SQLite audit.

300-unit on-screen monitoring
Real-time full polling
Batch: start/stop/speed/clear fault
Auto data logging (adjustable interval)
3 roles (operator/maintainer/admin)

FFU Cloud Platform

Web remote monitoring

Site overview / device monitoring / trends / alerts / remote control.

Site overview + zone grid
Real-time trends (ECharts)
Alert center: fault/offline
Web start/stop/speed (auth + audit)
User management

Core Technology

Every item proven in the field

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Standard Modbus

Standard Modbus protocol, seamless integration with console, touchscreen and cloud.

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Auto Addressing

Factory-default address, auto-assigned per unit during installation, saved to device storage. Install = configured.

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FOC Vector Control

FOC vector control, smooth and efficient across the full speed range, low torque ripple and noise.

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Active PFC

Active PFC power correction, PF 0.989, THD ≤10%, third-party harmonic test certified.

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12+ Fault Protections

OC/OV/UV/stall/phase-loss/over-temp etc. No auto-recovery, lock after 3 failed starts, traceable fault codes.

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Logging & Audit

Full lifecycle data logging with traceable operation and fault history.

Measured Performance

Laboratory measured electrical performance

Power Factor PF

THD

Maximum Speed

0RPM

Power Range

※ Lab measured data; full report available from sales

System Specifications

Key technical specifications

Components	Gateway 5028 + Control 5020 + Motor Driver 5021 + Console/Cloud
Capacity	300 units / gateway (5 zones × 60)
Links	Ethernet / RS-485
Protocol	Standard Modbus protocol
Speed range	0 ~ 1300 RPM (per motor model)
Power range	0 ~ 150W
Power factor	PF 0.989 (measured)
THD	≤10% @30W / ≤6% @100W
Protection	12+ types (OC/OV/UV/stall/phase-loss/OT etc.)

Applications

For environments with stringent cleanliness requirements

Semiconductor Fabs

Cleanliness control for litho / etch / thin-film areas

Cleanrooms

Electronics / pharma / food clean workshops

Data Centers

Positive pressure and airflow management

Laboratories

Constant temp/humidity clean labs ventilation

Downloads

Datasheets and manuals (being uploaded)

Datasheets / manuals in preparation — contact sales

☁️ Enter FFU Smart Cloud ↗