Three-quarter view of floor-standing FFU central control cabinet with blue touchscreen

FFU and Terminal Air Purification Equipment

FFU Central Control System

A floor-standing control cabinet that supervises multiple FFU zones through an industrial HMI, protected power distribution and building-network communication.

Multi-Zone HMI Control
Central Alarm Overview
Operating Data Logging
BACnet or Modbus Interface

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Product Introduction

The FFU central control system consolidates cleanroom fan commands, feedback and alarms in a lockable electrical cabinet. An industrial touchscreen presents zone status, airflow or speed setpoints and maintenance warnings, while internal PLC, power supplies, circuit protection and network repeaters distribute commands to field-connected EC fan filter units. The architecture can place routine room operation on the HMI and pass selected points to the building management system. Separate power and communication terminals simplify commissioning and isolate a field wiring fault from the supervisory electronics.

Key Features

A graphical HMI displays FFU zones, operating states and active faults from one service location.

PLC-based sequences can apply occupied, standby and recovery setpoints to different cleanroom areas.

Logged fan hours, alarm events and selected environmental points support maintenance planning.

Isolated BACnet or Modbus communication exchanges approved status and command points with the BMS.

Customer Product Concerns

A large FFU installation becomes difficult to operate when individual units lack common setpoints, fault visibility and a controlled interface to the building system.

Operators walk through multiple rooms to change hundreds of local fan settings.The central HMI applies commands to defined FFU zones from one supervised interface.

A failed fan remains unnoticed until particle control is affected.Motor feedback and communication alarms identify the affected address and zone promptly.

Night operation consumes full fan power even when contamination loads are low.Scheduled occupied and standby modes reduce selected EC fan setpoints without shutting down monitoring.

Direct BMS commands can conflict with local cleanroom operating sequences.A defined gateway exposes selected points while the PLC retains interlocks and command priorities.

Typical Applications

Large semiconductor FFU ceilingsMulti-room pharmaceutical facilitiesBattery dry-room clean zonesDisplay and optics manufacturingCentral cleanroom operations centres

Technical Parameters

Representative enclosure and electronics ranges for an FFU central control system are listed below.

Core Material	Industrial PLC, touchscreen HMI, 24 VDC power supplies, protected distribution and isolated RS-485/Ethernet gateways
Panel Thickness	180-300 mm control-cabinet depth
Effective Width	600-1000 mm nominal cabinet width
Maximum Length	Up to 1800 mm cabinet height for expanded power and communication sections
Steel Facing Thickness	1.5-2.0 mm powder-coated steel enclosure and hinged front door
Core Density	Approximately 1800-1900 kg/m³ nominal density of the FR-4 substrate used in the central control board
Thermal Conductivity	Approximately 0.25-0.40 W/(m·K) through the FR-4 substrate inside the FFU central controller
Surface Finish	Light-grey or cleanroom-white epoxy-polyester powder-coated cabinet with sealed HMI bezel
Joint Type	Gasketed hinged door, DIN-rail terminal blocks, separated gland plates and pluggable field connectors
Customization	Available based on the intended application and operating environment.

Available Options

Wall-mount or floor-standing cabinetBACnet MS/TP, Modbus RTU or Ethernet gatewayDifferential pressure and temperature inputsRemote web dashboard and event logging

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