® U.S. Registered Trademark
EN0B-1023 GE02R0700
Copyright © 2000 Honeywell Inc. • All rights reserved
AQS51/61-KAM
COMBINED CO
2
-/TEMPERATURE
DUCT SENSOR/CONTROLLER
PRODUCT DATA
GENERAL
The AQS51-KAM and AQS 61-KAM sensors/controllers for
duct mounting measure the carbon dioxide (CO
2
) con-
centration and the temperature in the return or outside air.
They are used in ventilation and air conditioning systems to
control the amount of fresh outside air being supplied to the
occupants for acceptable indoor air quality and to reduce
unnecessary conditioning of outside air during low-
occupancy periods.
This Demand Controlled Ventilation (DCV) is a cost effective
solution to conserve energy and to ensure that the fresh
outside air supplied is no more than is necessary to meet the
actual requirements of the occupants at any given time.
The sensors/controllers offer separate 0(2)...10Vdc or
0(4)...20mA outputs for CO
2
and temperature and in addition
a digital ON/OFF relay output with switching hysteresis for
alarm or other purposes.
The UART interface (RS232) for serial communication allows
a PC to be connected in order to perform maintenance
checks or reconfigurations during normal operation. If used
as a controller, each of these outputs can be configured to
provide a more complex ventilation strategy based on a
mixture of CO
2
plus temperature measurements and to
assign a number of functions, including hierarchy.
For this analog output configuration, the software program
STRATEGY is available, which is part of the User Interface
Program Software package AQS-USP22 used for re-
calibration, change of the measurement range or other
service or set-up purposes.
The switching setpoint and differential of the relay output for
CO
2
limit monitoring or plant/system ON/OFF control can be
adjusted within the measurement range. This output can be
used also as automatic fire threshold to switch off ventilation,
when CO
2
levels exceed normal limit of e. g. 2500 ppm in
case of fire.
FEATURES
•
CO
2
measurement range 0...3000 ppm corresponding
to 0...0.3% CO
2
. Factory-calibrated 0...2000 ppm
•
Multifunctional unit for temperature and CO
2
-
measurement or control
•
State-of-the-art Non-Dispersion-Infrared (NDIR)
technology to measure carbon dioxide gas
•
Automatic drift correction (ABC-algorithm) based on a
long term evaluation provides typical zero drift check
maintenance-intervals of up to 5 years
•
Standard output signals 0(2)...10 Vdc or 0(4)...20 mA
each for CO
2
and temperature measurement or control
•
Programmable mixed controller signal output(s)
provides ventilation control strategies to match
exactly the application requirements
•
Digital ON/OFF relay output for CO
2
limit monitoring
•
RS232 interface for configuration, parameter setting
or data exchange with a PC using Windows 95/98
•
User interface program on diskette for service,
recalibration and change of measurement ranges
•
Optional with 4-digit LCD display with the selectable
indication of:
•
- CO
2
and room temperature alternating
- Error code
- CO
2
-concentration (ppm)
- Temperature (
°°°°
C)
- Analog Output1
- Analog Output2
