User Manual

2
Siemens
Datasheet
A6V11610252_en
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a
Smart Infrastructure 2019-07-12
Use
The sensor is used in ventilation and air conditioning plants for:
● Controlling or limiting the flow temperature
● Limiting the return temperature
● Controlling the domestic hot water (DHW) temperature
Function
The immersion temperature sensor acquires the temperature of the medium via its sensing
element whose resistance value changes as a function of the temperature. This change is
converted to a Modbus RS-485 output signal. The output signal corresponds to the selected
temperature range.
Technical design
Cable entry is made via the M16 cable entry gland (IP54) supplied with the sensor which can
be screwed into the housing. Immersion rod and housing are rigidly connected.
Type summary
Product number SSN NO. Accessory Immersion
length
Operating voltage Output signal
QAE2154.010/MO S55720-S465 With clamp for
protection pocket
1)
100 mm AC 24 V ±20 %/
DC 13.5...35 V
Modbus RTU
1)
Protection pocket needs to be ordered separately.
Ordering
When ordering, please specify name and product number, for example: Immersion
temperature sensor QAE2154.010/MO.
Accessories
Accessories are not included with standard delivery.
Name Material Nominal
pressure
Type of sealing Immersion
length
Type reference
Protection
pocket
Brass (CuZn37) PN10 Threaded with sealing
means
100 mm ALT-SB100
Protection
pocket
V4A (1.4571) PN16 Threaded with sealing
means
100 mm ALT-SS100
Protection
pocket
V4A (1.4571) PN40 With flange for flat seal 100 mm ALT-SSF100
For other protection pocket accessories, see datasheet N1194.
Notes
Engineering
If the nominal pressure exceeds PN10, protection pockets made of stainless steel (V4A) are
required. The temperature measuring range must be selected on the sensor, if required.
Powering the sensor requires a transformer for safety extra low-voltage (SELV) with
separate windings for 100 % duty. When sizing and protecting the transformer, comply with
all local safety regulations.
When sizing the transformer, determine the power consumption of the room sensor.
For correct wiring, see the datasheets of the devices with which the sensor is used.
Observe permissible line lengths.