Honeywell excel 10 w7753a User Manual

9

95-7520—02

The installation wiring diagrams should indicate the locations 

for placement of 209541B Termination Module(s). Refer to the 

E-Bus Wiring Guidelines, form 74-2865, and the Excel 10 FTT 

Termination Module Installation Instructions, form 95-7554. 

Correct placement of the termination module(s) is required for 

proper E-Bus communications.

W7753A CONTROLLER STATUS LED
The LED on the front and center of a W7753A Controller 

provides a visual indication of the status of the controller. See 

Fig. 15. When the W7753A receives power, the LED should 

appear in one of the following allowable states:

1. Off—no power to the processor.

2. Continuous On—processor is in initialized state.

3. Slow Blink—controlling, normal state.

4. Fast Blink—when the Excel 10 has an alarm condition.

ALARMS
When an Excel 10 has an alarm condition, it reports it to the 

central node on the E-Bus (typically, the Excel 10 Zone 

Manager, or Small Building Controller). See Table 1. The 

information contained in an alarm message follows:

• Subnet Number: This is the E-Bus subnet that contains the 

Excel 10 node that has the alarm condition. Subnet 1 is on 

the Zone Manager side of the router; Subnet 2 is on the 

other side of the router.

• Node Number: This is the Excel 10 node that has the alarm 

condition (see Network Statics).

Alarm Type: The specific alarm being issued. An Excel 10 can 

provide the alarm types listed in Table 1.

The Service Message allows a device on the E-Bus to be 

positively identified. The Service Message contains the 

controller ID number and, therefore, can be used to confirm 

the physical location of a particular Excel 10 in a building.

There is one method of broadcasting the Service Message 

from an Excel 10 W7753A Controller. This uses a hardware 

push button on the side of the controller (see Fig. 16).

When an Assign ID command is issued from the 

commissioning tool, the node goes into the 

SERVICE_MESSAGE mode for five minutes. In the 

SERVICE_MESSAGE mode, pressing the service pin on the 

controller or the bypass button on a wall module causes the 

Service Message to be broadcast on the network. All other 

functions are normal in the SERVICE_MESSAGE mode.

The controller must be configured using the Excel 10 E-Vision 

PC configuration tool. Once this is done, the W7753A can be 

commanded to MANUAL mode, and each output can be 

exercised/viewed to verify proper wiring connections and 

equipment operation. See the Excel 10 E-Vision Users Guide, 

form 74-2588 for details on configuring and testing W7753A 

Controllers.

For the detailed descriptions of the sequences of operation, 

see the Excel 10 Unit Ventilator System Engineering, 

form 74-2964 Appendix B.

M12697

1

2

3

4

5

6

7

8

9 10 11 12 13 14

15 J3

31 30 29 28 27 26

25 24 23 22 21 20

19 18 17

16

E 

GND

LED BYPASS SNSR GND SET PT AI-1 

OHM

GND A1-2 

OHM

AI-3 

V/mA

GND AI-4

V/mA

22VDC

OUT

E-BUS E-BUS

JACK

DI-4 GND DI-3 DI-2 GND

DI-1 24

VAC

24

VAC

COM

1

OUT

2

OUT

3

OUT

4

OUT

5

OUT

6

OUT

7

OUT

8

OUT

W7753A

STATUS 

LED

M10094

SERVICE
PIN
BUTTON