Hello everyone, I'm Brother Xue. The building automation system has an intersection with HVAC, electrical, energy, intelligent lighting and other majors, so how to divide this interface, and what interface requirements are needed?
The interface requirements, technical interface and division of labor interface between the building automation system and other specialties
1. Air conditioning system requirements
Fresh air treatment unit (four controls/humidification/constant frequency)
1. In the power box, the operation status and fault alarm signals should be provided for the building automatic control system (all are passive normally open contacts), and a special relay for start and stop should be provided (AC24V, the current is less than 5A, and the start and stop is a relay to promote the work of the fan of the strong current control cabinet), and the coil should be led to the external lead terminal. A local/remote control switch (providing a manual/automatic status passive contact) should be installed in the power box for maintenance by service personnel.
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
2. The power supply of the water valve actuator is AC24V. The power consumption should preferably not be greater than 10W. The water valve opening (equal percentage) control should be able to receive a 0-10VDC control signal.
3, Humidifier:
The humidifier (regulation) should be able to accept the adjustment signal of 0~10V. And it can provide an output of 0-10VDC feedback signal.
High-voltage micro-mist (switch) start-stop control signal: We provide relay normally open signal for relay output, which can overvoltage 220V and current ≤5A. The other party provides a working voltage of 220VAC to push the humidifier to work.
4. Damper actuator requirements:
The on/off control (floating-point controlled) damper actuator is required to be AC24V control voltage, passive node, and provide normally open feedback signal.
The regulated damper requires a power supply of AC24V, which should be able to receive 0-10VDC control signals and provide 4~20mA or 0-10VDC feedback signals.
5. Electrostatic precipitator:
The operation status and dust cleaning prompt signals should be provided for the building automatic control system (all are passive normally open contacts), and special relays for start and stop should be provided (AC24V, the current is less than 5A, the start and stop is a relay, and the strong current control electrostatic precipitator should be promoted).
Running state: passive node, providing always-on signal
Dust cleaning prompt signal: passive node, providing normally open signal
Fresh air treatment unit (four controls/humidification/inverter)
1. In the power box, the operation status and fault alarm signals should be provided for the building automatic control system (all are passive normally open contacts), and a special relay for start and stop should be provided (AC24V, the current is less than 5A, and the start and stop is a relay to promote the work of the fan of the strong current control cabinet), and the coil should be led to the external lead terminal. A local/remote control switch (providing a manual/automatic status passive contact) should be installed in the power box for maintenance by service personnel.
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
2. The power supply of the water valve actuator is AC24V. The power consumption should preferably not be greater than 10W. The water valve opening (equal percentage) control should be able to receive a 0-10VDC control signal.
3, Humidifier:
The humidifier (regulation) should be able to accept the adjustment signal of 0~10V. And it can provide an output of 0-10VDC feedback signal.
High-voltage micro-mist (switch) start-stop control signal: We provide relay normally open signal for relay output, which can overvoltage 220V and current ≤5A. The other party provides a working voltage of 220VAC to push the humidifier to work.
4. Damper actuator requirements:
The on/off control (floating-point controlled) damper actuator is required to be AC24V control voltage, passive node, and provide normally open feedback signal.
The regulated damper requires a power supply of AC24V, which should be able to receive 0-10VDC control signals and provide 4~20mA or 0-10VDC feedback signals.
5. Frequency conversion control equipment:
The equipment that needs frequency conversion control should be able to provide the frequency converter, and the frequency converter should be able to accept the control signal of 4~20mA or 0~10v. And it can provide output of 4~20mA or 0-10VDC frequency feedback signal. All contacts should be led to the special external terminals marked with positive and negative poles.
Inverter operating state: passive node, providing normally open signal
Inverter fault alarm: passive node, providing normally open signal
Inverter start-stop: special relay (AC24V, current less than 5A, start-stop is a relay, promote the work of the strong current inverter), its coil should be led to the external lead terminal.
6. Electrostatic precipitator:
The operation status and dust cleaning prompt signals should be provided for the building automatic control system (all are passive normally open contacts), and special relays for start and stop should be provided (AC24V, the current is less than 5A, the start and stop is a relay, and the strong current control electrostatic precipitator should be promoted).
Running state: passive node, providing always-on signal
Dust cleaning prompt signal: passive node, providing normally open signal
Ceiling-mounted heat recovery air handling unit
1. In the power box, the operation status and fault alarm signals should be provided for the building automatic control system (all are passive normally open contacts), and a special relay for start and stop should be provided (AC24V, the current is less than 5A, and the start and stop is a relay to promote the work of the fan of the strong current control cabinet), and the coil should be led to the external lead terminal. A local/remote control switch (providing a manual/automatic status passive contact) should be installed in the power box for maintenance by service personnel.
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
2. The power supply of the water valve actuator is AC24V. The power consumption should preferably not be greater than 10W. The water valve opening (equal percentage) control should be able to receive a 0-10VDC control signal.
3, Humidifier:
The humidifier (regulation) should be able to accept the adjustment signal of 0~10V. And it can provide an output of 0-10VDC feedback signal.
High-voltage micro-mist (switch) start-stop control signal: We provide relay normally open signal for relay output, which can overvoltage 220V and current ≤5A. The other party provides a working voltage of 220VAC to push the humidifier to work.
4. Damper actuator requirements:
The on/off control (floating-point controlled) damper actuator is required to be AC24V control voltage, passive node, and provide normally open feedback signal.
The regulated damper requires a power supply of AC24V, which should be able to receive 0-10VDC control signals and provide 4~20mA or 0-10VDC feedback signals.
5. Frequency conversion control equipment:
The equipment that needs frequency conversion control should be able to provide the frequency converter, and the frequency converter should be able to accept the control signal of 4~20mA or 0~10v. And it can provide output of 4~20mA or 0-10VDC frequency feedback signal. All contacts should be led to the special external terminals marked with positive and negative poles.
Inverter operating state: passive node, providing normally open signal
Inverter fault alarm: passive node, providing normally open signal
Inverter start-stop: special relay (AC24V, current less than 5A, start-stop is a relay, promote the work of the strong current inverter), its coil should be led to the external lead terminal.
6. Electrostatic precipitator:
The operation status and dust cleaning prompt signals should be provided for the building automatic control system (all are passive normally open contacts), and special relays for start and stop should be provided (AC24V, the current is less than 5A, the start and stop is a relay, and the strong current control electrostatic precipitator should be promoted).
Running state: passive node, providing always-on signal
Dust cleaning prompt signal: passive node, providing normally open signal
Combined Air Handler (Quad Control/Humidification/Inverter)
1. In the power box, the operation status and fault alarm signals should be provided for the building automatic control system (all are passive normally open contacts), and a special relay for start and stop should be provided (AC24V, the current is less than 5A, and the start and stop is a relay to promote the work of the fan of the strong current control cabinet), and the coil should be led to the external lead terminal. A local/remote control switch (providing a manual/automatic status passive contact) should be installed in the power box for maintenance by service personnel.
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
2. The power supply of the water valve actuator is AC24V. The power consumption should preferably not be greater than 10W. The water valve opening (equal percentage) control should be able to receive a 0-10VDC control signal.
3, Humidifier:
The humidifier (regulation) should be able to accept the adjustment signal of 0~10V. And it can provide an output of 0-10VDC feedback signal.
High-voltage micro-mist (switch) start-stop control signal: We provide relay normally open signal for relay output, which can overvoltage 220V and current ≤5A. The other party provides a working voltage of 220VAC to push the humidifier to work.
4. Damper actuator requirements:
The on/off control (floating-point controlled) damper actuator is required to be AC24V control voltage, passive node, and provide normally open feedback signal.
The regulated damper requires a power supply of AC24V, which should be able to receive 0-10VDC control signals and provide 4~20mA or 0-10VDC feedback signals.
5. Frequency conversion control equipment:
The equipment that needs frequency conversion control should be able to provide the frequency converter, and the frequency converter should be able to accept the control signal of 4~20mA or 0~10v. And it can provide output of 4~20mA or 0-10VDC frequency feedback signal. All contacts should be led to the special external terminals marked with positive and negative poles.
Inverter operating state: passive node, providing normally open signal
Inverter fault alarm: passive node, providing normally open signal
Inverter start-stop: special relay (AC24V, current less than 5A, start-stop is a relay, promote the work of the strong current inverter), its coil should be led to the external lead terminal.
6. Electrostatic precipitator:
The operation status and dust cleaning prompt signals should be provided for the building automatic control system (all are passive normally open contacts), and special relays for start and stop should be provided (AC24V, the current is less than 5A, the start and stop is a relay, and the strong current control electrostatic precipitator should be promoted).
Running state: passive node, providing always-on signal
Dust cleaning prompt signal: passive node, providing normally open signal
Air Handler (Return Air Type) (Non-Humidifying/Constant Frequency)
1. In the power box, the operation status and fault alarm signals should be provided for the building automatic control system (all are passive normally open contacts), and a special relay for start and stop should be provided (AC24V, the current is less than 5A, and the start and stop is a relay to promote the work of the fan of the strong current control cabinet), and the coil should be led to the external lead terminal. A local/remote control switch (providing a manual/automatic status passive contact) should be installed in the power box for maintenance by service personnel.
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
2. The power supply of the water valve actuator is AC24V. The power consumption should preferably not be greater than 10W. The water valve opening (equal percentage) control should be able to receive a 0-10VDC control signal.
3. Electrostatic precipitator:
The operation status and dust cleaning prompt signals should be provided for the building automatic control system (all are passive normally open contacts), and special relays for start and stop should be provided (AC24V, the current is less than 5A, the start and stop is a relay, and the strong current control electrostatic precipitator should be promoted).
Running state: passive node, providing always-on signal
Dust cleaning prompt signal: passive node, providing normally open signal
4. Damper actuator requirements:
The on/off control (floating-point controlled) damper actuator is required to be AC24V control voltage, passive node, and provide normally open feedback signal.
The regulated damper requires a power supply of AC24V, which should be able to receive 0-10VDC control signals and provide 4~20mA or 0-10VDC feedback signals.
2. Air supply and exhaust system
1. Exhaust fan
In the power box of the exhaust fan, the operating status and fault alarm signals should be provided for the building automatic control system (all are passive normally open contacts), and a special relay for start and stop (AC24V, the current is less than 5A, and the start and stop is a relay to promote the work of the fan of the strong current control cabinet), and its coil should be led to the external lead terminal. A local/remote control switch (providing a manual/automatic status passive contact) should be installed in the power box for maintenance by service personnel.
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
2. Make-up fan
In the power box of the make-up fan, the operation status and fault alarm signals should be provided for the building automatic control system (all are passive normally open contacts), and a special relay for start and stop (AC24V, the current is less than 5A, the start and stop is a relay to promote the work of the fan of the strong current control cabinet), and the coil should be led to the external lead terminal. A local/remote control switch (providing a manual/automatic status passive contact) should be installed in the power box for maintenance by service personnel.
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
3. Exhaust fan (frequency conversion)
In the power box of the exhaust fan, the operating status and fault alarm signals should be provided for the building automatic control system (all are passive normally open contacts), and a special relay for start and stop (AC24V, the current is less than 5A, and the start and stop is a relay to promote the work of the fan of the strong current control cabinet), and its coil should be led to the external lead terminal. A local/remote control switch (providing a manual/automatic status passive contact) should be installed in the power box for maintenance by service personnel.
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
Fan inverter:
The equipment that needs frequency conversion control should be able to provide the frequency converter, and the frequency converter should be able to accept the control signal of 4~20mA or 0~10v. And it can provide output of 4~20mA or 0-10VDC frequency feedback signal. All contacts should be led to the special external terminals marked with positive and negative poles.
Inverter operating state: passive node, providing normally open signal
Inverter fault alarm: passive node, providing normally open signal
Inverter start-stop: special relay (AC24V, current less than 5A, start-stop is a relay, promote the work of the strong current inverter), its coil should be led to the external lead terminal.
3. Water supply and drainage system
Submersible Sewage Pump/Rainwater Pump:
In the electric control box, the operation status, manual/automatic status and fault alarm signals (all passive normally open contacts) should be provided for the building automation system.
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
Hot Water Circulating Pump:
In the electric control box, the operation status, manual/automatic status and fault alarm signals (all passive normally open contacts) should be provided for the building automation system.
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
Feed/Grey Water Pump:
The electric control box should provide the building automation system with operating status, manual/automatic status and fault alarm signals (all of which are passive normally open contacts).
Running state: passive node, providing always-on signal
Fault alarm: passive node, provide normally open signal
Hand / Auto Operation: Passive node, providing normally open signal
The inverter control equipment should be able to provide the inverter, and the inverter should be able to accept the control signal of 4~20mA or 0~10v. And it can provide output of 4~20mA or 0-10VDC frequency feedback signal. All contacts should be led to the special external terminals marked with positive and negative poles.
Inverter operating state: passive node, providing normally open signal
Inverter fault alarm: passive node, providing normally open signal
Inverter start-stop: special relay (AC24V, current less than 5A, start-stop is a relay, promote the work of the strong current inverter), its coil should be led to the external lead terminal.
Fourth, the system integration excuse requirements
1. Communication interface of cold and heat source system:
The building automation system requires the cooling and heating source system to have RS485 standard communication ports, and all the information of the cooling and heating source systems is uploaded to the building automation system through this communication interface, and their own communication formats such as communication rate, parity check form, etc. All information should be based on international standard protocols such as BACnet or Modbus. In the event of a communication failure, the cold and heat source systems must ensure that all information has been sent from the communication port and meets the requirements. The specific agreement must be technically disclosed and negotiated before the system is commissioned. The communication distance is no more than 1200 meters from BACnet and 600 meters from Modbus.
2. Communication interface of intelligent lighting system
The building automation system requires the intelligent lighting system to have an RS485 standard communication port, and all the information of the intelligent lighting system is uploaded to the building automation system through this communication interface, and its own communication format is published such as communication rate, parity check form, etc. All information should be based on international standard protocols such as BACnet or Modbus. In the event of a communication failure, the intelligent lighting system must ensure that all information has been sent from the communication port and meets the requirements. The specific agreement must be technically disclosed and negotiated before the system is commissioned. The communication distance is no more than 1200 meters from BACnet and 600 meters from Modbus.
3. Communication interface of substation and distribution system
The building automation system requires the substation and distribution system to have RS485 standard communication port, and all the information of the substation and distribution system is uploaded to the building automation system through this communication interface, and its own communication format is published such as communication rate, parity check form, etc. All information should be based on international standard protocols such as BACnet or Modbus. In the event of a communication failure, the substation and distribution system must ensure that all information has been sent from the communication port and meets the requirements. The specific agreement must be technically disclosed and negotiated before the system is commissioned. The communication distance is no more than 1200 meters from BACnet and 600 meters from Modbus.
4. Elevator system interface
The building automation system requires the elevator system to have RS485 standard communication port, and all the information of the elevator system is uploaded to the building automation system through this communication interface, and its own communication format is published such as communication rate, parity form, etc. All information should be based on international standard protocols such as BACnet or Modbus. In the event of a communication failure, the elevator system must ensure that all information has been sent from the communication port and meets the requirements. The specific agreement must be technically disclosed and negotiated before the system is commissioned. The communication distance is no more than 1200 meters from BACnet and 600 meters from Modbus.
5. Substation automation system interface
The building automation system requires the substation automation system to have RS485 standard communication port, and all the information of the substation automation system is uploaded to the building automation system through this communication interface, and its own communication format is published such as communication rate, parity check form, etc. All information should be based on international standard protocols such as BACnet or Modbus. In the event of a communication failure, the substation automation system must ensure that all information has been sent from the communication port and meets the requirements. The specific agreement must be technically disclosed and negotiated before the system is commissioned. The communication distance is no more than 1200 meters from BACnet and 600 meters from Modbus.
6. Swimming pool system interface
The building automation system requires the swimming pool system to have RS485 standard communication port, and all the information of the swimming pool system is uploaded to the building automation system through this communication interface, and its own communication format is published such as communication rate, parity form, etc. All information should be based on international standard protocols such as BACnet or Modbus. In the event of a communication failure, the pool system must ensure that all information has been sent from the communication port and meets the requirements. The specific agreement must be technically disclosed and negotiated before the system is commissioned. The communication distance is no more than 1200 meters from BACnet and 600 meters from Modbus.
7. Energy metering system interface
The building automatic control system requires the energy metering system to have an RS485 standard communication port, and all the information of the energy metering system is uploaded to the building automatic control system through this communication interface, and its own communication format is published such as communication rate, parity check form, etc. All information should be based on international standard protocols such as BACnet or Modbus. In the event of a communication failure, the energy metering system must ensure that all information has been sent from the communication port and that the requirements are met. The specific agreement must be technically disclosed and negotiated before the system is commissioned. The communication distance is no more than 1200 meters from BACnet and 600 meters from Modbus.
V. Supplementary Notes:
(1) The AC24V relay power supply is provided by the building automation system, please note that the total power of each power box/cabinet special relay should not be greater than 10W. If this power box/cabinet supplies power to the air conditioning unit or fresh air unit, please note that the total power of the control relay should not be greater than 5W. If it is exceeded, we recommend that the power box/cabinet be equipped with a 24VAC power supply (please indicate in advance whether it is a 24VAC power supply).
(2) The power cabinet should be uniformly, clearly and correctly numbered the signal terminals that need to be monitored by the building automation system.
(3) It is recommended that the operating (on/off) status signal of the relevant equipment can be drawn from the normally open passive auxiliary contact of the contactor.
(4) It is recommended that the fault alarm signal of the relevant equipment can be drawn from the normally open passive auxiliary contact of the thermal protection relay.
(5) The specific interface points should be consistent with the point list provided by our company. Before the final procurement of equipment, the deepening interface (e.g., quantity, location, type, etc.) should be fed back to the building automation contractor for confirmation.
Sixth, the scope of work
1. Scope with HVAC system
The scope of work of the HVAC equipment manufacturer: responsible for the reservation of the sensor installation hole on the refrigeration system pipeline;
The scope of work of the strong current control cabinet manufacturer: responsible for the output and acceptance of control signals of the operation status and fault alarm signals of all fans and pump equipment, and draw these signals out to the terminal strip, and the role of these signals is indicated in the number.
2. With the scope of water supply and drainage system
The scope of work of the manufacturer of the strong current control cabinet of the water supply and drainage system: responsible for the output and acceptance of the control signals of the operation status and fault alarm signals of all pump equipment, and the signals are drawn out to the terminal strip, and the role of these signals is indicated in the number.
3. With the range of electric valve suppliers
Since all self-control valves are purchased by Party A, the valve supplier must meet the requirements of the bidding documents for the valve, and provide the terminal wiring diagram of the signal output and control signal input. The building automation system takes a signal from the valve actuator and outputs the control signal to the valve actuator. During the operation of the system, as long as the control signal given by the building automation system has reached the valve actuator, any problems and faults that occur during the operation of the valve shall be dealt with and solved by the valve supplier itself. The electric valve is installed by the electric valve supplier and provides its own working power supply, the wiring of the power supply is completed by the electric valve supplier, and the building equipment system is only responsible for controlling the laying and wiring of the signal line.
7. Reserved and embedded utilization rate
Confirm that the utilization rate of the existing implemented trunking and pipelines is: 100%
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