AHU Control π¬οΈπ’ | BMS HVAC Explained
Han Xin ELV System
Teaching ELV Systems: CCTV | Fire Alarm | Access Control | BMS | Networking | Smart Building Technology.
05/06/2026
What is AHU Control in BMS?
π¬οΈ AHU = Air Handling Unit
BMS controls:
β Fan speed
β Cooling valves
β Dampers
β Air temperature
β Ventilation airflow
β Filter monitoring
The goal is comfortable, clean, and energy-efficient air.
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Field Panel βοΈπ¦ | BMS Local Control Cabinet Explained
04/06/2026
What is a BMS Field Panel?
π¦ Itβs the local control cabinet for building systems.
Inside a field panel:
β BMS controllers
β Relays
β Power supplies
β Input/output modules
β Network communication devices
β Terminal wiring
It connects sensors, actuators, and equipment into one smart control system.
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Digital Output β‘π | BMS ON/OFF Control Explained
03/06/2026
What is Digital Output in BMS?
π It switches equipment ON or OFF.
BMS uses digital output to:
β Start fans
β Stop pumps
β Turn lights ON/OFF
β Control exhaust systems
β Automate building operation
Simple commandβpowerful automation.
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Smooth Equipment Control in Smart Buildings
02/06/2026
What is Analog Output in BMS?
β‘ It sends variable control signals like 0β10V.
BMS uses it to:
β Control fan speed
β Adjust valve position
β Regulate airflow
β Improve energy efficiency
More signal = more control.
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BMS ON/OFF Signal Basic
01/06/2026
What is Digital Input in BMS?
π It reads simple ON/OFF signals from field devices.
Examples:
β Pump RUN / STOP
β Door OPEN / CLOSED
β Alarm ACTIVE / NORMAL
β Flow YES / NO
Simple signalsβbut very important for monitoring.
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