Honeywell W7761A Control Application, Control Provided, Products Covered, Organization of Manual

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EXCEL 10 W7761A INPUT/OUTPUT DEVICE

Control Application

The W7761A, Excel 10 Remote Input/Output device, provides auxiliary inputs and outputs for use with an Excel 10 Zone Manager and Excel 10 controllers over the Echelon® LonWorks® E-Bus. The W7761A Remote Input/Output Device can be connected to outdoor air temperature and humidity sensors that can be used by other Excel 10 controllers on the E-Bus or Excel 5000 controllers on the C-Bus through the Excel 10 Zone Manager. This would allow the controllers to use their physical inputs for monitoring other elements such as return humidity, IAQ, etc. to achieve better control. The W7761A can be used to average many space temperature sensors that are located in a zone that is controlled by the W7750 Constant Volume AHU Controller. The W7761A device has 8 Digital Outputs which may be Discrete, Modulating or Floating. For example, this allows the control of lighting zones, miscellaneous exhaust or ventilation fans, miscellaneous pumps, and can enable freeze protection. See Fig. 2.

OA

 

HUMIDITY

MISC.

 

 

FANS

 

EXCEL 10

 

W7761A

OA

REMOTE

INPUT/OUTPUT

TEMPERATURE

 

PUMPS

LIGHTING

CONTROL

OCCUPANCY

SENSOR

EXCEL 10 T7770

 

 

WALL MODULE

WINDOW CONTACT

M12885

Fig. 2. Typical W7761A control application.

Control Provided

The W7761A was not intended to control staged or modulating heating/cooling coils, mixed air economizer dampers, or system fan/heat pump units. The W7761A contains inputs and outputs, but no control software. All control that would be associated with the inputs and outputs in the W7761A would be accomplished though the Excel Zone Manager and would not be suitable for VAV control, temperature control, or any control function that would require less than a 30 second update rate.

Products Covered

This System Engineering Guide describes how to apply the W7761A Excel 10 Remote Input/Output Device and related accessories to typical applications. The specific devices covered include:

•W7761A Remote I/O device.

•T7770 A through D Wall Modules.

•Q7750A Excel 10 Zone Manager.

•Q7751A Router (FTT to FTT only).

•Q7752A Serial Interface Adapter.

•Q7740A,B Repeaters (2-way and 4-way).

•209541B FTT Termination Module.

Organization of Manual

This manual is divided into three basic parts: the Introduction, the Application Steps, and the Appendices that provide supporting information. The Introduction and Application Steps 1 through 5 provide the information needed to make accurate material ordering decisions. Application Step 6 and the Appendices include configuration engineering that can be started using Excel E-Vision PC Software after the devices and accessories are ordered. Application Step 7 is troubleshooting.

The organization of the manual assumes a project is being engineered from start to finish. If an operator is adding to, or is changing an existing system, the Table of Contents can provide the relevant information.

Applicable Literature

The following list of documents contains information related to the Excel 10 W7761 Remote I/O Device and the EXCEL 5000®

System in general.

 

Form No.

Title

4

74-2699

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Contents Excel 10 W7761A Remote Input/Output Device List of Tables AppendicesDescription of Devices Typical system overviewControl Application Control ProvidedProducts Covered Organization of ManualProduct Names Agency Listings Abbreviations and DefinitionsExcel 10 W7761A INPUT/OUTPUT Device Construction ControllersExcel 10 W7761A Remote I/O Device W7761A construction in in. mm Performance Specifications Power List Of Available Points W7761ASpecified Space Temperature Sensing Range Environmental Operating TemperatureShipping Temperature Memory CapacityDischarge Air Temperature Outdoor Air TemperatureReturn Air Temperature Mixed Air TemperatureWall Modules 5585Configurations T7780 construction, subbase dimensions in in. mmMixed-Output-Type Control Occupancy SensorWindow Open/Closed Digital Input Wall Module OptionsPlan The System OverviewApplication Steps Step No Description Determine Other Bus Devices Required Lay Out Communications and Power WiringBus Layout 750,1$ Power Wiring Power Budget Calculation ExampleVA Ratings For Transformer Sizing Device Description Line LossVA Rating Nema class 2 transformer voltage output limitsLine VOLTAGE` GREATER` Than 150 VAC General Considerations Prepare Wiring DiagramsW7761A Devices W7761A I/O Description Terminal Number DescriptionTemperature Sensor DE V IC E Window Contact Contact Closed = Occupancy Sensor Occupied Valve Actuator Bus Termination Module Typical Pneumatic transducer Series 60 Floating to W7761ASee for E-Bus termination wiring options +$672 Order Equipment Excel 10 W7750 ControllersT7770 Wall Modules SensorsAccessories Echelon Based Components and PartsCabling Temperature Degrees Excel 10 Alarms Broadcasting the Service MessageW7761A Device Status LED T7780 Ddwm Bypass Pushbutton LED StatesAppendix A. Using E-Vision to Commission a W7761 Device Adding Analog Inputs Enthalpy 4 to 20 mAAdding Other VOLTAGE/CURRENT Sensors Adding Digital Inputs Appendix B. Sequences of Operation Room Temperature Sensor RmTempCommon Operations Window Sensor StatusWndw Dirty Filter MonitorSeries 60 Modulating Control Pulse Width Modulating PWM ControlTemperature Relative Humidity RelativeAir Flow CO 2 ConcentrationDefault Table C1. Input/Output Points LeftTable C1. Input/Output Points Right Excel 10 W7761A INPUT/OUTPUT Device Values that can be assigned to any output channels English Metric or User Address DI3Sel1Type Refer to the description for DI1Sel1Type Stoff Stnul Stlow Stmed Sthigh Ston DO2Type Excel 10 W7761A INPUT/OUTPUT Device SrcDigIn2Sts Refer to the description for SrcDigIn1Sts Table C2. Control Parameters Left Table C2. Control Parameters Right SH MA DA EV HW MN TSNoalarm Table C3. Status Points LeftTable C3. Status Points Right RIO1 Software version NvoStatus InOverride SH MA DA EV HW MN TS Table C4. Configuration Parameters Left Table C4. Configuration Parameters Right DO0 Higher than the value specified for AILowLimit DO4 Seconds = 25.6 seconds DO6PWMPeriod Refer to the description for DO1PWMPeriod Table C5. Direct Access And Special Points Left Table C5. Direct Access And Special Points RightApproximate Memory Size Estimating Procedure Fig. D-1. Point capacity estimate for Zone ManagerAppendix E. Sensor Data for Calibration Resistance SensorsSensor Type Sensor Use1956.79 Table E-4. Sensor Voltage Versus Humidity Voltage/Current SensorsHumidity Percentage Sensor Voltage C7600C1008 4 to 20 mA C7600C output current vs. humidity Sensor Type Fig. E-6. Graph of Sensor Current versus Enthalpy volts CO 2 Concentration PPM Sensor Voltage Table E-9. Sensor Voltage Versus CO 2 ConcentrationTable E-10. Sensor Voltage Versus Input Voltage To A/D Table E-11. Sensor Voltage Vdc Versus Pressure Inw Voltage to A/D Sensor VoltagePressure Inw kPa Sensor Voltage Vdc 3ODD
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