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THERMASGARD® MWTM - Modbus - T3

Mean value temperature measuring transducers THERMASGARD® MWTM - Modbus - T3

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Product group: WG01
Mean value temperature measuring transducers THERMASGARD® MWTM - Modbus - T3
Calibratable THERMASGARD® MWTM - Modbus - T3 mean value temperature measuring transducer with Modbus connection, in an impact resistant plastic housing with quick-locking screws, optionally with/without display, with flexible sensor rod (0.4...20m, fully active) in a robust protective plastic-coated copper tube, incl. mounting flange.

The rod sensor serves to detect the mean temperature (mean value) in gaseous media. It is used in ventilation and air conditioning ducts over the entire cross-section or on a defined length (laid along a meandering route, it uniformly detects the surrounding temperature). For proper mounting of the rod, mounting clamps MK-05-M mounting clamps (accessory) are available.
Innovative Modbus temperature transmitter with galvanically separated RS485 interface, selectable bus termination resistance, DIP switches for setting the bus parametres and bus address in current-free state, LEDs for telegram status display, two separate push-in terminals and a large back-lit three-line display with customised programming in the 7-segment range and dot-matrix ranges. Uses internal diagnostics to detect sensor breakage or shorts as errors. The error messages can be retrieved via Modbus and are shown on the display. The sensor is factory-calibrated and can be fine-tuned to ambient conditions by an expert.
Technical details
Voltage supply
24 V AC (± 20 %) and
15…36 V DC
Power consumption
< 1.2 W/ 24 V DC; < 1.8 VA/ 24 V AC
Temperature deviation
typically ± 0.2 K at +25 °C
Sensor
Pt1000, DIN EN 60751, class B
Measuring range
– 50...+ 150 °C; Tmin –50 °C, Tmax + 80 °C
Zero point offset
± 10 °C
Ambient temperature
Measuring transducer –30...+70 °C
Medium
clean air and
non-aggressive, non-combustible gases
Error detection
sensor breakage, sensor short circuit
Bus protocol
Modbus (RTU mode),
address range 0...247 selectable
Signal filtering
0,3 s / 1 s / 10 s
Process connection
by mounting flange, plastic
(galvanised steel optional, see accessories)
and mounting clamps MK - 05 - M
Sleeve
stainless steel, 1.4571, V4A
Rod material
copper sensor tube, plastic-coated,
with spring for buckling protection
Probe
active over the entire length
(averaging)
Electrical connection
0.2 - 1.5 mm², via push-in terminal
Cable connection
cable gland, plastic
(2x M 20 x 1.5; with strain relief, exchangeable,
inner diameter 8 - 13 mm) or
M12 connector according to DIN EN 61076-2-101
(optional on request)
Cable gland
2x M 20 x 1.5; with strain relief, exchangeable,
inner diameter 8 - 13 mm
Installation
Bending radius > 35 mm
admissible vibration load ½ g
admissible tensile load < 480N
Permissible air humidity
< 95 % r. H., non-precipitating air
Protection class
III (according to EN 60 730)
Protection type
IP 65 (according to EN 60 529)*
Standards
CE conformity,
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU
Internal diagnostics
Error 1 at sensor breakage
Error 2 at sensor short circuit