Introduction; Description Of Devices; Control Application; Fig. 1. Typical T7300F/Q7300H Lonworks® Network Diagram - Honeywell Q7300H System Engineering

T7300F/Q7300H SERIES 2000 COMMERCIAL THERMOSTATS AND COMMUNICATING SUBBASES

INTRODUCTION

Description of Devices

The Q7300H Subbase is a LonMark® certified device that
provides networking capability for the T7300F Thermostat
in a LonWorks® system using a transformer-coupled Free
Topology Transceiver (FTT). See Fig. 1.
The T7300F/Q7300H communicates with all LonMark®
devices including the following:
Other T7300F/Q7300H Commercial
Thermostat/Communicating Subbases.
— Excel 15 S7760A Command Display.
— Excel 10 W7750A,B Constant Volume Air Handler
Unit (CVAHU) Controller.
— Excel 15 W7760A Building Manager.
— Excel 10 W7761A Remote Input/Output (RIO)
Controller.
NOTEBOOK PC
MODEM
BUILDING MANAGER
1 4 8
EXCEL 15
W7760
30 31
17 23
RS-232
SERIAL
PORT
SLTA
MODEM
BUILDING MANAGER
1 4 8
EXCEL 15
W7760
17 23 30 31
RS-232
SERIAL
PORT
SLTA
Fig. 1. Typical T7300F/Q7300H LonWorks® network diagram.

Control Application

The T7300F/Q7300H Series 2000 Commercial
Thermostats and Communicating Subbases control 24
Vac commercial single zone heating, ventilating and air
conditioning (HVAC) equipment. In addition, the Q7300H
can communicate schedule information and system
instructions to other devices in a LonWorks® network.
Fig. 2 shows a typical T7300F/Q7300H application in a
three-stage heat and two-stage cool heat pump system.
For additional T7300F/Q7300H hookups, see Fig. 13, 15,
16.
12 16
EXCEL 10
CVAHU
44
37
LonWorks ® BUS
S7760
Back Select
12 16
EXCEL 10
CVAHU
37 44
LonWorks ® BUS
S7760
Back Select
3
WALL MODULE
T7300
WALL MODULE
T7300
M16083B
63-4365