CMa20
Outdoor M-Bus temperature and humidity sensor
The CMa20 is an M-Bus communicating temperature and humidity sensor for outdoor use. CMa20 is the ideal product for temperature and humidity report of outdoor climate. The high accuracy sensor and user friendly handling makes the CMa20 the perfect choice for outdoor climate logging.
Description
TEMPERATURE AND HUMIDITY
The CMa20 has a high accuracy temperature and humidity sensor, which will provide precise and fast readings. The precision meets the standards for measuring outdoor climate.
M-BUS READOUT
The M-Bus readout consists of momentary values and the average values for the last hour and day. The power used by CMa20 is only 1 T (1.5 mA) and both primary and secondary addressing mode can be used.
Technical data
Mechanics
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Casing material
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Polystyrol
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Protection class
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IP65
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Dimensions
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110 x 100 x 52 mm
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Weight
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140 g
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Connection M-Bus
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Screw terminal <1.5 mm²
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Mounting
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Wall mounted
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Electrical
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Power supply
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21-42 VDC through M-Bus connection, independent of the wiring polarity
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Power consumption
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1.5 mA M-Bus 1T
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Environmental
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Operating temperature range
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-40 °C to +55 °C
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Storage temperature range
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-40 °C to +85 °C
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Operating humidity
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0 to 100 % RH no condensation
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Temperature sensor
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Temperature range
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-40 °C to +55 °C
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Temperature accuracy 10 to +30 °C
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+/- 0.2 °C
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Temperature accuracy 0 to +10 °C
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+/- 0.4 °C
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Temperature accuracy -10 to +0 °C
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+/- 0.5 °C
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Temperature accuracy -40 to +55 °C
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+/- 1.5 °C
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Humidity sensor
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Range
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0-100 % RH
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Repeatability RH
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+/- 0.1 % RH
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Humidity accuracy 10 to 90 %RH
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+/- 2 %
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Humidity accuracy 0 to 100 %RH
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+/- 4 %
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M-Bus
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M-Bus standard
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EN 13757
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M-Bus baud rate
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300, 2400 Bit/s
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IR interface
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No
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M-Bus commands
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SND_UD, SND_NKE, REQ_UD2
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Addressing modes
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Secondary, Primary
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Momentary values
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Temperature, humidity, status
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Historic values
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Average values for last hour and last day
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Approvals
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EMC
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EN 61000-6-2, EN 61000-6-3
|
Downloads
| CMa20 User's manual | CMa20 Outdoor M-Bus temperature and humidity sensor user's manual | |
| CMa20 Quick manual | CMa20 Outdoor M-Bus temperature and humidity sensor quick manual |
| CMa20 Product sheet | CMa20 Outdoor M-Bus temperature and humidity sensor product sheet |
| CMa10, CMa11 Declaration of conformity | CMa10, CMa11 Declaration of conformity |
Knowledge base
No knowledge base downloads found.
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