Han Xin ELV System

What is AHU Control in BMS?

🌬️ AHU = Air Handling Unit

BMS controls:
✔ Fan speed
✔ Cooling valves
✔ Dampers
✔ Air temperature
✔ Ventilation airflow
✔ Filter monitoring

The goal is comfortable, clean, and energy-efficient air.

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What is a BMS Field Panel?

📦 It’s the local control cabinet for building systems.

Inside a field panel:
✔ BMS controllers
✔ Relays
✔ Power supplies
✔ Input/output modules
✔ Network communication devices
✔ Terminal wiring

It connects sensors, actuators, and equipment into one smart control system.

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What is Digital Output in BMS?

🔘 It switches equipment ON or OFF.

BMS uses digital output to:
✔ Start fans
✔ Stop pumps
✔ Turn lights ON/OFF
✔ Control exhaust systems
✔ Automate building operation

Simple command—powerful automation.

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What is Analog Output in BMS?

⚡ It sends variable control signals like 0–10V.

BMS uses it to:
✔ Control fan speed
✔ Adjust valve position
✔ Regulate airflow
✔ Improve energy efficiency

More signal = more control.

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What is Digital Input in BMS?

🔘 It reads simple ON/OFF signals from field devices.

Examples:
✔ Pump RUN / STOP
✔ Door OPEN / CLOSED
✔ Alarm ACTIVE / NORMAL
✔ Flow YES / NO

Simple signals—but very important for monitoring.

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