Honeywell W7620 用户手册

The W7620 Single  Zone Control System is Honeywell’s

new  line of single zone   control  products. The W7620,
can conveniently monitor and control  individual HVAC

zone equipment.

System features include CNAP (Control Network

Automation Protocol) communication, application

flexibility, DDC (Direct Digital Control), network
integration, easy installation and programming, and

increased  equipment reliability.

The basic  W7620  Single  Zone  Controller has built-in
capability to process I/O  (Input/Output) data, run DDC
programs, and communicate along with other devices  on
the CNAP  network.  See  W7620 family photo.

The  W7620  Single   Zone Controller is a DDC device.

DDC has a control loop which periodically updates the
outputs as a  function  of a  set of measured inputs and a
given set of algorithms.  The  advantages of DDC  are:

The W7620 Single  Zone  Controller provides sophisticated

control loops for accurate control of single zone equipment 
that prevents  temperature  droop and provides greater
comfort  in the zone.

Use of a single programmed computer reduces
requirements for calibration checks because there are

fewer interconnected analog components. Periodic

recalibration is automatically performed.

EEPROM (Electrically Erasable  Programmable Read

Only Memory) and EPROM  (Erasable   Programmable
Read Only Memory) hold the control  program  and
parameters eliminating the need  for a battery.

Networking controllers together on  a   RS-485   network
using  CNAP software  provides information for integration
of control functions, monitoring, trending, alarming, and
report generation.

The  W7620 Single  Zone  Controller can be applied in a
stand-alone environment with distributed zone control
and hard-wired time-of-day functionality  It can also be

applied as part of a networked  system via connection to

the RS-485 CNAP network. The CNAP network  enables

communication to multiple W7620  Zone  Controllers as

well as to other controllers,  such as the W7600  Control

Module, 47640 NIU  or a Q7650  PC Interface  Card in

a PC with ZM7603 Remote Monitoring software.  Refer
to the  ZM7601 Configuration  Tool/ZM7603 Remote

Monitoring software specification sheet,  Form  63-4272,
for a more detailed description.

Through the  CNAP  network, the controller can be
provided with information specific  to its controlled zone

only,  or with information necessary for a  group of zone

controllers.  ZM7601/ZM7603   software  can,  in  turn,  be

provided  with periodic information on  any controller data
for monitoring, data gathering, or report generating. See
Figure 1.

The  W7620  Zone Control System was designed for

application flexibility. Simply  by changing the  algorithm
which is stored in EBPROM and by determining  the  input

and output requirements, the same 

 

 

be applied in a variety of applications.

‘Ike W7620 Baseboard provides input dedicated to the
T7660 Space Temperature Sensor (space temperature,

remote setpoint,  bypass switch with LED feedback, and

CNAP communication connections). The baseboard  only
provides four SPST  (Single Pole, Single Throw)  relays.

A variety of small point, single zone  or heat pump
applications can be met by using only the W7620.

The  W7621 Input  Board  adds two resistive, one digital,

one AC input, and two voltage inputs that can be used

for a variety of inputs depending on application. One

W7621 input board can be  added  to the W7620  Zone

controller.

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