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BETA Monitoring
Monitoring of Plants and Devices
7
LQ2 0 temperature controllers
14/23
Siemens ET B1 · 10/2008
14
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Overview
The temperature controllers are used for controlling or limiting
temperatures in residential and non-residential buildings, as well
as in industrial areas. They're used for heating registers, panel
and hot air heating and direct floor heating, as a limiting thermostat
for air-conditioning systems and cooling systems, control cabinet
cooling, etc. as well as for temperature control in humid and
dusty rooms. Can also be used for inaccessible room temperature
setting for rooms in public buildings, such as schools, dayrooms
and comparable applications.
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Benefits
•
Electronic temperature controllers with red/green LED for
supply voltage indication, switching status indication and
temperature sensor monitoring. This supports the monitoring
of safe operation at all times
•
The temperature sensor with the measuring element KTY or a
PT100 is monitored for short circuits and interruptions. This
protects against unpleasant surprises during operation.
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Technical specifications
7
LQ2 001
7
LQ2 002
7
LQ2 003
7
LQ2 005
Standards
EN 60730
Rated control voltage U
c
V AC 230
Operating range
At 50/60 Hz
×
U
c
0.8 ... 1.2
Rated frequency f
n
Hz
45 ... 65
Measuring ranges, setting ranges
°C
-30 ...
+30 0 ... +60
+40 ... +100 2 ... +400
Switching hysteresis
Adjustable
°C
1 ... 5
4 ... 20
Status indication, LED
Switching status indication
•
Actuating voltage
Green
•
Switching state ON
Red
•
Break or short circuit of the sensor conductor
Red flashing
Different phases
Actuator/contact permissible
Yes
Electrical isolation
Creepage distances and
clearances, actuator/contact mm
4
Rated impulse withstand voltage U
imp
(1.2/50
s)
Actuator/contact
kV
> 2.5
Contacts
contact
1
CO
•
Rated operational voltage U
e
V AC 250
•
Rated operational current
I
s
-
At p.f. = 1
A
16
-
At p.f. = 0.4
A
4
•
Minimum contact load
V; mA 10; 100
•
Contact switching
Closes with increasing
temperature
Terminals 3/4
Terminals
•
Terminals
±
screw (Pozidriv)
PZ 1
•
Conductor cross-sections
-
Rigid
mm
2
1.5 ... 6
-
Flexible, with end sleeve
Min.
mm
2
0.75
Environmental conditions
•
Permissible ambient temperature
-
Device
°C
-10 ...
+55
-
Temperature sensor
°C
-30 ...
+105
--
•
Permissible humidity
-
Device
%
80
-
Temperature sensor
%
98
--
•
Degree of protection
Acc. to EN 60529
-
Device
IP20, with connected conductors
-
Temperature sensor
IP65
--
•
Safety class
Acc. to EN 61010
II
© Siemens AG 2008