User Manual

The setting element is located inside the cover. It consists of 6 pins and a shorting plug.
It is used to select the required measuring range and to activate the test function.
The different plug positions have the following meaning
• For the temperature measuring range:
Shorting plug in the left position (R1) = 0...50 °C
Shorting plug in the mid position (R2) = − 50...+ 50 °C (factory setting)
Shorting plug in the right position (R3) = − 35...+ 35 °C
• For activating the test function:
Shorting plug in the horizontal position: The values according to the table "Test
function active" will be made available at the signal output.
In the event of fault, the output signal will reach 0 V (4 mA) after 60 seconds.
Engineering notes
To power the sensor, a transformer for safety extra low-voltage (SELV) with separate
windings for 100 % duty is required. When sizing and electrically protecting the
transformer, local safety regulations must be observed.
When sizing the transformer, the power consumption of the temperature sensor must
be taken into consideration. For correct wiring, refer to the Data Sheets of the devices
with which the sensor is used.
The permissible cable lengths must be observed.
When laying the cables, it must be observed that the longer the cables run side by side
and the smaller the distance between them, the greater the electrical interference.
Twisted pair cables are required for the secondary supply lines and the signal lines.
Mounting notes
• For supply air temperature control: Downstream from the fan, if the fan is located
after the last air handling unit. Otherwise, after the last air handling unit with a
minimum distance of 0.5 m
• For extract air temperature control: Always upstream of the extract air fan
• As a limit sensor for the supply air temperature: As close as possible to the air outlet
into the room
• For dew point control: Immediately after the spray trap of the air washer
Manually bend the probe so that it lies diagonally across the duct or in equally spaced
windings across the entire duct cross-section. The probe must not touch the duct wall.
Mounting Instructions are printed on the packaging.
Permitted: Not permitted:
1761Z03
max. 70 mm
min. 200 mm
2
1
1761Z05
1761Z07
Fault
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Cable routing
and
cable selection
Mounting location
Mounting positions
Mounting examples
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Siemens Duct temperature sensors QAM2161.040, QAM2171.040 CE1N1762en
Building Technologies 2014-07-30