User Manual

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542

QXA2001 QXA2000 AQX2000

Condensation Monitor

QXA2000

QXA2001

1542P03

1542P01

1542P02

The QXA2000 condensation monitor is used to avoid damage due to condensa-

tion on chilled ceilings and in HVAC plant.

It operates on AC/DC 24 V and has a potential free AC/DC 1…48 V changeover

contact. Suited for use with extension module AQX2000 (AC 230 V) equipped with

a potential free AC 12…250 V changeover contact.

Use

For monitoring condensation in buildings with chilled ceilings or in ventilation, air condi-

tioning or heating plant.

The condensation monitor is used

• to prevent condensation on chilled ceilings

• to prevent condensation at critical spots of HVAC plant or buildings

(in air ducts, near fans, etc.)

• as a condensation switch

In general, the condensation monitor is for use on all kinds of surfaces where conden-

sation must be avoided.

Ordering and delivery

When ordering the condensation monitor, please give name and type reference. It is

supplied complete with a strap-on band for pipe diameters from 10 to 100 mm and

thermal conductive paste.

The AQX2000 extension module, which is offered as an accessory item, must be or-

dered separately.

CE1N1542en

30.09.2010

Building Tech

nologies

Summary of content (8 pages)

PAGE 1
QXA2001 QXA2000 Condensation Monitor 1542P02 1542P01 1542P03 1 542 AQX2000 QXA2000 QXA2001 The QXA2000 condensation monitor is used to avoid damage due to condensation on chilled ceilings and in HVAC plant. It operates on AC / DC 24 V and has a potential free AC / DC 1…48 V changeover contact. Suited for use with extension module AQX2000 (AC 230 V) equipped with a potential free AC 12…250 V changeover contact.
PAGE 2
Equipment combinations Suited for use with all types of devices • that operate on AC / DC 24 V and that can handle the condensation signal delivered by the monitor’s potential free AC / DC 1...48 V relay changeover contact, or • that, in connection with the AQX2000 extension module, operate on AC 230 V and that can handle the condensation signal delivered by the module’s potential free AC / DC 12...
PAGE 3
QXA2001 Versions such as QXA2000 have, however, offset sensor heads (fixed cable connection of 1.5 meters) rather than a directly integrated sensor. View: Sensor head on the mounting side 1 2 3 View: Sensor head front side Sensing element Tensioning strap Connector cable 1.5 m to base housing The AQX2000 extension module consists of base, top section and printed circuit board with the lateral connection terminals. RXZ40.1 The RXZ40.
PAGE 4
Disposal Dispose of the device as electronic waste in compliance with European directive 2002/96/EEC (WEEE) and not as municipal waste. Observe all relevant national regulations and dispose of the unit correctly. Observe all local and applicable laws. Mounting notes QXA2000 condensation monitor Mounting choices: • Pipe-mounting with strap-on band (pipe diameter 10...
PAGE 5
Technical data QXA2000, QXA2001 Power supply G (G+), G0 (G−) Operating voltage Rated voltage Frequency Power consumption SELV/PELV AC / DC 24 V ± 20 % AC / DC 24 V 50 / 60 Hz max. 1 VA Switching point on increase of humidity Switching differential (fixed) Response time in static air From 80 auf 99 % r. h. From 99 auf 80 % r. h. Condensation 95 ± 4 % r. h. approx. 5 % r. h.
PAGE 6
AQX2000 Power supply (L, N) Inputs Outputs Operating voltage Rated voltage Frequency Power consumption AC 230 V ± 10 % AC 230 V 50 / 60 Hz max. 4 VA Status signal input (D, GND) Contact voltage Contact current DC 37 V (SELV/PELV) 13 mA Voltage output (G, G0) Operating voltage Frequency at AC 24 V Load Relay output (Q11, Q12, Q14) Operating voltage range Operating current range Switching capacity Protective data AC 24 V ± 20 % (SELV/PELV) 50 / 60 Hz max.
PAGE 7
Diagrams Internal diagrams G (G+) Q12 Q11 Q14 AQX2000 Connection diagram G D L G0 GND N Q11 Q12 Q14 1542G02 (G-) G0 1542G01 r.F. % G (G+) Operating voltage AC 24 V (DC 24 V) G0 (G−) System neutral Q... Potential free changeover contact AC / DC 1... 48 V G Operating voltage AC 24 V G0 System neutral D, GND Status signal input DC 37 V for potential free changeover contact of the QXA2000, QXA2001 L, N Mains voltage AC 230 V Q... Potential free changeover contact AC / DC 12...
PAGE 8
Dimensions QXA2000 QXA2001 AQX2000 Dimensions in mm 8/8 2002-2010 Siemens Switzerland Ltd Siemens Building Technologies Condensations Monitor QXA2000 / QXA2001 Din Rail Subject to alteration CE1N1542en 30.09.