User Manual

Setpoint range 15…95 % r.h.
Control mode on/off
Switching differential approx. 4 % r.h. (fixed)
Type of switch potential-free microswitch (S.P.D.T.)
Contact rating
Maximum 5 (3) A, AC 250 V
Minimum 100 mA, AC 24 V
External supply line protection (EU)
Fuse slow max. 10 A
or
Circuit breaker max. 13 A
Characteristic B, C, D
according to EN 60898
or
Power source with current limitation of max.
10 A
Temperature influence compensated
Long-term stability approx. − 1.5 % r.h./a
Balancing at 55 % r.h., 23 °C
Time constant (v = 0.2 m / s) approx. 3 min
Perm. air velocity 10 m/s
Perm. ambient temperature
Operation 0…70 °C
Storage / transport − 30…+ 70 °C
Degree of protection
Protection class II according to EN 60730-1
Protection degree of housing
QFM81.2 IP30 according to EN 60529
QFM81.21 IP55 according to EN 60529
Directives and Standards
Product standard EN 60730-1
Automatic electrical controls for house-
hold and similar use
Electromagnetic compatibility (Applications) For use in residential, commerce, light-
industrial and industrial environments
EU Conformity (CE) CM1T1514xx
*)
Connection terminals for 0.5 mm dia. min.
2 x 1.5 mm
2
max.
Environmental compatibility:
The product environmental declaration OE-T-99.41761e
*)
contains data on environmen-
tally compatible product design and assessments (RoHS compliance, materials compo-
sition, packaging, environmental benefit, disposal).
Materials
Sensing element Polymer
Casing with stem PPS, Fortron 1140L6, glass fibrerein-
forced
Cover PC Lexan 940
Transparent cover PC Makrolon 2014R, transparent
(only with QFM81.21)
Weight approx. 0.34 kg
Maintenance maintenance-free, can be recalibrated
*) The documents can be downloaded from http://siemens.com/bt/download.
Technical data
4/5
Siemens Duct Hygrostats QFM81… CM1N1514E
Building Technologies 2014-07-30