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

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