Wall-mounted cleanroom DDC control panel shown complete in three-quarter view

Cleanroom Control and Environmental Monitoring Systems

Cleanroom DDC Control System

A distributed direct-digital-control panel that manages cleanroom HVAC loops, schedules and alarms through networked BACnet room and plant controllers.

Distributed HVAC Control
BACnet Controller Network
Local Trend Buffering
Expandable Universal I/O

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Product Introduction

DDC controllers are distributed between AHUs, mechanical rooms and cleanroom zones so each group of HVAC points is controlled close to the equipment. Universal inputs accept common temperature, humidity and pressure signals, while analog and digital outputs command dampers, valves and fan drives. BACnet communication exposes live values, alarms, schedules and trends to the building-management platform. Local programs and retained configuration allow the controlled plant to continue operating during a supervisory-network interruption.

Key Features

Distributed controllers shorten field wiring between HVAC equipment and the control point.

Universal I/O channels can be configured for common sensor, contact and actuator signals.

Local schedules, alarms and trend buffers remain active without a central workstation connection.

BACnet networking supports shared values and coordinated operation across multiple cleanroom zones.

Customer Product Concerns

A DDC system must distribute control efficiently while preserving a consistent point structure and dependable communication to the central BMS.

Long home-run cables increase installation complexity and analog noise.Local DDC panels position I/O near AHUs and cleanroom zone equipment.

Different controller programs use inconsistent point names.A standardized device and point naming structure keeps graphics, alarms and trends aligned.

Supervisory network loss interrupts basic plant sequences.Local DDC logic, schedules and retained setpoints continue at the controller level.

Adding one sensor consumes a dedicated fixed-function module.Configurable universal I/O channels accommodate several common signal types.

Typical Applications

Air-handling unit DDCCleanroom zone controlMechanical-room automationBuilding automation retrofits

Technical Parameters

Typical cleanroom DDC panel construction ranges are given below.

Core Material	Powder-coated steel enclosure with FR-4 DDC boards and pluggable copper terminals
Panel Thickness	160-300 mm enclosure depth
Effective Width	400-800 mm panel width
Maximum Length	Up to 1200 mm panel height
Steel Facing Thickness	1.2-1.5 mm powder-coated steel panels
Core Density	7800-8050 kg/m³ for steel enclosure components
Thermal Conductivity	45-60 W/(m·K) for the steel cabinet
Surface Finish	Fine-textured off-white powder coat with printed terminal identification
Joint Type	Wall-mounted DIN-rail enclosure with removable terminal blocks and BACnet trunk connections
Customization	Available based on the intended application and operating environment.

Available Options

BACnet MS/TP or BACnet/IPLocal operator displayRemote I/O expansionIntegrated 24 VAC power supply

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