GCS Product Overview - Basyx VVR
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Product Data Global Control Solutions GCS Basyx VVR Product Overview The Basyx VVR controller provides direct digital control of pressure- independent variable air volume boxes. The VVR is a snap-track mounted controller used for retrofit projects where existing 3-wire floating motors are available, and includes a differential pressure sensor for accurate monitoring and control of air flow at very low volumes. The unit controls through a sophisticated PID algorithm which constantly resets air flow requirements by space temperature, thus eliminating constant damper hunting typical of temperature only control units. The Basyx VVR controller contains four (4) relay outputs for binary control of fan or heating stages, and one (1) 0-10vdc output for control of modulating reheat valves. In addition, an inexpensive room temperature sensor provides space monitoring as well as setpoint adjustment and override activation. The system may be installed as a stand-alone unit, requiring no connection with other controllers. A Windows based Setup and Service Program allows direct connection to the VVR through an RJ11 jack on the room sensor, which facilitates easy setup and manual operation for air balance and system commissioning. The VVR may also be installed as a part of a complete Basyx control and automation system with a maximum configuration of 256 controllers. When connected within the Basyx network, all VVR controllers may be interrogated and programmed through the standard Basyx TriComm interface software, including direct connect, modem connection or intranet/internet interface. The Basyx VVR system technology allows system firmware to be modified or upgraded through a flash memory configuration, and does not require Eprom changes for system updates. Dual processors enhance the overall operation and capabilities of the unit. Features • “Stand-alone” operation requires no central controller for system operation. • Designed for retrofit applications where existing 3-wire floating motors are available. • Single unit provides control of cooling only, reheat, fan-powered reheat and constant volume terminal units. • Air flow control through space temperature reset insures the proper air flow within the controlled space - Eliminates the “hunting” of damper and associated air noise commonly found with temperature only based controls • On-board pressure differential sensor performs monitoring of air flows and eliminates mounting and wiring of external devices. • Inexpensive room temperature sensor allows setpoint adjustment and override of the system. • Four (4) relay outputs and one (1) 0-10vdc analog output provide automatic control of staged heating and reheat valves. • Unit will operate as a stand-alone unit, requiring no connection to other systems or controllers - Ideal for pneumatic system replacements. • Windows setup program allows connection directly through the room sensor, makes air balancing and system startup easy. • Program integrity through flash memory which retains system programming upon a loss of power. • Flash memory allows firmware upgrades through laptop or telephone connection - No chips to change. • May be installed as a part of an overall Basyx automation and control system, with a total system capacity of 256 controllers. • Maximum communications bus length of 4000 feet. • 24vac power reduces installation cost.
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GCS Product Overview- BASYX VVR
Transcript of GCS Product Overview - Basyx VVR
Product DataGlobal Control Solutions
GCS
Basyx VVR
Product Overview
The Basyx VVR controller provides direct digital control of pressure-independent variable air volume boxes. The VVR is a snap-track mountedcontroller used for retrofit projects where existing 3-wire floating motors areavailable, and includes a differential pressure sensor for accurate monitoringand control of air flow at very low volumes. The unit controls through asophisticated PID algorithm which constantly resets air flow requirements byspace temperature, thus eliminating constant damper hunting typical oftemperature only control units.
The Basyx VVR controller contains four (4) relay outputs for binary control offan or heating stages, and one (1) 0-10vdc output for control of modulatingreheat valves. In addition, an inexpensive room temperature sensor providesspace monitoring as well as setpoint adjustment and override activation. Thesystem may be installed as a stand-alone unit, requiring no connection withother controllers. A Windows based Setup and Service Program allowsdirect connection to the VVR through an RJ11 jack on the room sensor, whichfacilitates easy setup and manual operation for air balance and system commissioning. The VVR may also be installed as a partof a complete Basyx control and automation system with a maximum configuration of 256 controllers. When connected within theBasyx network, all VVR controllers may be interrogated and programmed through the standard Basyx TriComm interfacesoftware, including direct connect, modem connection or intranet/internet interface.
The Basyx VVR system technology allows system firmware to be modified or upgraded through a flash memory configuration,and does not require Eprom changes for system updates. Dual processors enhance the overall operation and capabilities of theunit.
Features
• “Stand-alone” operation requires no central controller for system operation.• Designed for retrofit applications where existing 3-wire floating motors are available.• Single unit provides control of cooling only, reheat, fan-powered reheat and constant volume terminal units.• Air flow control through space temperature reset insures the proper air flow within the controlled space - Eliminates the
“hunting” of damper and associated air noise commonly found with temperature only based controls• On-board pressure differential sensor performs monitoring of air flows and eliminates mounting and wiring of external
devices.• Inexpensive room temperature sensor allows setpoint adjustment and override of the system.• Four (4) relay outputs and one (1) 0-10vdc analog output provide automatic control of staged heating and reheat valves.• Unit will operate as a stand-alone unit, requiring no connection to other systems or controllers - Ideal for pneumatic
system replacements.• Windows setup program allows connection directly through the room sensor, makes air balancing and system startup
easy.• Program integrity through flash memory which retains system programming upon a loss of power.• Flash memory allows firmware upgrades through laptop or telephone connection - No chips to change.• May be installed as a part of an overall Basyx automation and control system, with a total system capacity of 256
controllers.• Maximum communications bus length of 4000 feet.• 24vac power reduces installation cost.
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Typical Wiring Details
Specifications
Communication: EIA RS-485 at 57.6K baud on 18AWG shielded, plenum rated cable (recommended Belden 6300FE or equivalent)
Power Requirements: Voltage: 24VAC (-10% / 5%), 50/60/HzCurrent: 2.4VA plus actuator currentRecommend 5VA transformer sizing for AC power
Analog Inputs: (3) 10K ohm thermistor 10,000 ohm type II.
Digital Inputs: (2) Dry contacts >/= 50ms timing
Analog Outputs: (1) 0-10VDC >/= 1K ohm drive impedance
Digital Outputs: (4) Dry contacts: SPST pilot duty rated 1 amp at 24VAC/24VDC
Environmental Limits: Temperature: 32oF to 125oF.Humidity (non-condensing): 95%
UL Listing: ANSI/UL 916
Dimensions: 4.5"W x 4.0"H x 1.75"D
Shipping Weight: Approx. 0.5 lbs.
Although accurate at the time of publication, data is subject to change without notice
