Honeywell W7761A specifications Construction, Controllers

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EXCEL 10 W7761A INPUT/OUTPUT DEVICE

PWM - Pulse Width Modulated output; allows analog modulating control of equipment using a digital output on the controller.

RTD - Resistance Temperature Detector; refers to a type of temperature sensor whose resistance output changes according to the temperature change of the sensing element.

RIO - Remote Input/Output Device. Provides auxiliary inputs and outputs for use with an Excel 10 Zone Manager and Excel 10 controllers.

Subnet - An E-Bus segment that is separated by a router from its Q7750A Zone Manager.

TOD - Time-Of-Day; the scheduling of Occupied and Unoccupied times of operation.

TPT - Twisted Pair Transceiver.

UV - Unit Ventilator Controller.

VA - Volt Amperes; a measure of electrical power output or consumption as applies to an ac device. Vac - Voltage alternating current; ac voltage rather than dc voltage.

VAV - Variable Air Volume; Refers to either a type of air distribution system, or to the W7751 Excel 10 VAV Box Controller that controls a single zone in a variable air volume delivery system.

VOC - Volatile Organic Compound; refers to a class of common pollutants sometimes found in buildings. Sources include

out-gassing of construction materials, production-line by-products, and general cleaning solvents. A VOC is occasionally used as a measure of indoor air quality.

W7750 - The model number of the Excel 10 CVAHU Controllers (also see CVAHU).

W7751 - The model number of the Excel 10 VAV Box Controllers (also see VAV).

W7752 - The model number of the Excel 10 FCU Controllers (also see FCU).

W7753 - The model number of the Excel 10 UV Controllers (also see UV).

W7761 - The model number of the Excel 10 RIO Device (also see RIO).

Wall Module - The Excel 10 Space Temperature Sensor and other optional controller inputs are contained in the T7770 or T7780 Wall Modules. See Application Step 5. Order Equipment for details on the various models of Wall Modules.

XBS - Excel Building Supervisor; a PC based tool for monitoring and changing parameters in C-Bus devices.

Construction

Controllers

The Excel 10 W7761A RIO Device is available in one model. It contains 4 resistive inputs that can be configured for either 20Kohm NTC or PT3000 sensors, 2 voltage or current inputs, 4 digital inputs and 8 Digital Outputs (Triacs) which may be Discrete (maintained or momentary), Modulating (PWM) or Floating.

The W7761A consists of a single circuit board that is mounted in a sheet metal subbase and protected by a factory snap-on cover. The device mounts with two screws (see Fig. 3 or 4). Using DIN rail adapters (see Fig. 5) they can also be snapped onto standard EN 50 022 35 mm by 7.5 mm (1-3/8 in. by 5/16 in.) DIN rail. DIN rail is available through local suppliers. If using DIN rail also purchase from Augat Inc. part number 2TK2D DIN rail (adapter) two each for every device (see Fig. 5). Wires are attached to the screw terminal blocks on both sides of the device. Connection for operator access to the E-Bus is provided by plugging the SLTA connector cable into the communications jack.

A channel in the cover allows the device status LED to be visible when the cover is in place. There are no field-serviceable parts on the circuit board and, therefore, it is intended that the cover never be removed.

The W7761A can be mounted in any orientation. Ventilation openings were designed into the cover to allow proper heat dissipation regardless of the mounting orientation. See Fig. 3 and 4.

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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 OptionsApplication Steps Step No Description OverviewPlan The System Bus Layout Lay Out Communications and Power WiringDetermine Other Bus Devices Required 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 W7761A Devices Prepare Wiring DiagramsGeneral Considerations 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 W7761A Device Status LED Broadcasting the Service MessageExcel 10 Alarms 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 Common Operations Room Temperature Sensor RmTempAppendix B. Sequences of Operation 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 Humidity Percentage Sensor Voltage Voltage/Current SensorsTable E-4. Sensor Voltage Versus Humidity C7600C1008 4 to 20 mA C7600C output current vs. humidity Sensor Type Fig. E-6. Graph of Sensor Current versus Enthalpy volts Table E-10. Sensor Voltage Versus Input Voltage To A/D Table E-9. Sensor Voltage Versus CO 2 ConcentrationCO 2 Concentration PPM Sensor Voltage Pressure Inw kPa Sensor Voltage Vdc Voltage to A/D Sensor VoltageTable E-11. Sensor Voltage Vdc Versus Pressure Inw 3ODD
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