Room temperature measuring transducer THERMASGARD® RTM1-Modbus

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Product group: WG01
Room temperature measuring transducer THERMASGARD® RTM1-Modbus
Calibratable THERMASGARD®RTM1 Modbus room temperature measuring transducer with Modbus connection, with/without optional display for showing the actual temperature, in an elegant housing made of plastic, with snap-on cover, base with 4-hole attachment, for mounting on vertically or horizontally installed in-wall flush boxes, with predetermined breaking point for on-wall cable entry.
The calibratable room operating device measures the temperature of non-aggressive gases, particularly air. Options include a setpoint potentiometer as an operating element as well as device versions with LCD display for showing temperature/humidity/dew point or setpoint readings. The displays (LCD) and the retrieval of measureed and control values are triggered via the Modbus interface.
Technical details
Voltage supply
24 V AC (± 20 %) and
15…36 V DC
Power consumption
< 1,0 VA/ 24 V DC
< 2,2 VA/ 24 V AC
Data points
temperature, relative humidity, dew point,
setpoint potentiometer
Deviation of humidity
typical ± 2.0 % r. H. (20…80 % r. H. ); at + 25 °C, otherwise ± 3.0 % r. H.
Temperature deviation
typically ± 0.2 K at +25 °C
digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability
Measuring range
0...+50 °C
Zero point offset
± 10 °C, adjustable by potentiometer
Ambient temperature
storage –35...+85 °C;
operation 0...+50 °C
clean air and
non-aggressive, non-combustible gases
Bus protocol
Modbus (RTU mode),
address range 0...247 selectable
Signal filtering
4 s / 32 s
Process connection
by screws
plastic, material ABS,
colour pure white (similar to RAL 9010)
85 x 85 x 27 mm (Baldur 1)
wall mounting or on in-wall flush box, Ø 55 mm,
base with 4 holes, for attachment to vertically or
horizontally installed in-wall flush boxes for rear cable entry,
with predetermined breaking point for cable entry
from top/ bottom in case of plain on-wall installation
Permissible air humidity
< 95 % r. H., non-precipitating air
Protection class
III (according to EN 60 730)
Protection type
IP 30 (according to EN 60 529)
CE conformity,
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU
Two-line display with illumination
, cutout 36 x 15 mm (W x H),
for displaying the ACTUAL temperature and the internal diagnostics
(sensor breakage, sensor short circuit)