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8/13/2019 1-Bms Design
http://slidepdf.com/reader/full/1-bms-design 1/22
Introduction to BASSystems
8/13/2019 1-Bms Design
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Specifying / Design of BMS• Define hardware point types:
– Analogue - within a specified range – Digital - On / Off or Open / Closed
– Metering - Water, Electricity via a Contact
• Define Control Strategy – Plant Control Strategy
– Software Interlocks – Set Values
– Time Parameters
– Alarm Limits
8/13/2019 1-Bms Design
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Analogue Input• Analogue Input
– 0-10Vdc – 0-10 000 Ohms
– 0-20mA
• Examples of A.I.
– Temperature Sensor
– Humidity Sensor – Pressure Transducer
– Light Level
– Solar Level
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Analogue Output
• Analogue Output – 0 to 10Vdc
• Examples of A.O.
– Electronic Actuators Valves / Dampers
– Speed Control
– Remote Setting Signal
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Digital Input
• Digital Input (Status or Binary Input) – Clean Contact (Volt Free)
• Examples of D.I.
– Air Flow Switch
– Door Contact
– Water Level Switch
8/13/2019 1-Bms Design
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Digital Output
• Digital Output (Binary Output) – A Switch
– 240Vac Rated
– Override Switches
• Examples of D.O.
– Start / Stop Fan – Start / Stop Chiller
– Switch On / Off Lights
8/13/2019 1-Bms Design
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Meter
• Metered Input (Pulse Input) – A High Speed Pulse
– Up to 600 Pulses per Minute
• Examples of Metering
– Water Consumption
– Electricity Consumption
– Number of Persons Passing a Turnstile
8/13/2019 1-Bms Design
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Software Points• Used to define the Control Strategy
• Typical Software Point Types – TIM - Time Schedules
– SPA - Set Point – CTL - PID Control Algorithms
– ROT - Rotation of Plant
– CAL - Calculation
– PRG - Programmable Freely Defined
– MD - Maximum Demand
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Typical AHU Plant
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Typical AHU PlantD.I. D.I.
D.I.
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Typical AHU PlantD.I. D.I.
D.I.
D.O.
D.O.
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Typical AHU PlantD.I. D.I.
D.I.
D.O.
D.O.
A.O. A.O.A.O.
A.O.
A.O. A.O.
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Typical AHU PlantD.I. D.I.
D.I.
D.O.
D.O.
A.O. A.O.A.O.
A.O.
A.O. A.O.
A.I.
A.I.
8/13/2019 1-Bms Design
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Select Outstation
• Based on Hardware count
• Match to appropriate Outstation
• Fixed hardware or Modular
• Allow spare capacity for future
expansion
8/13/2019 1-Bms Design
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UNC 132• Fixed Configuration
• 8 A.I.• 10 D.I.
• (2 Meter)
• 6 A.O.
• 8 D.O.
• Total 32 H/W
• 50 Software points
• EEPROM Backup
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Modules
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UNC 196 Outstation• 6 Card Slots
• 16 Channel A.I. Card• 16 Channel D.I. Card
• 16 Channel A.O. Card
• 16 Channel D.O. Card• 6 Channel Meter Card
• Door Status Included
• Power status Included
• Total = 6 X 16 + 2 = 98
• Up to 250 points = 152S/W
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8/13/2019 1-Bms Design
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Network Interface Unit
• Terminals
• Modems
• Bridges
• 3 X RS232
• 1 X LAN
8/13/2019 1-Bms Design
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Keypad• Local Interrogation
• Parameter Changes
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BAS2800+ SystemsArchitecture
PSTN
X2 5
ISDN
Copper
802.3
Fibre
Field*
Automation*
Management*
* As per CEN TC247 standards
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