Sensors

Elvaco offers temperature and humidity sensors, both for indoor and outdoor environments. The product line enables simple and cost-effective metering, which enables a more effective use of energy and a better real-estate climate. Sensors are available with M-Bus or Wireless M-Bus communication, as well as with or without display.  

 

CMa11 - Indoor temperature/humidity sensor, M-Bus

CMa11w is a two-way M-Bus temperature and humidity sensor for indoor use. The sensor offers high accuracy, reliability and user-friendliness, which makes it the optimal choice for tenant owners. Readout and configuration are easily performed via M-Bus or by using a mobile phone (via NFC).

Mechanics

Casing material:
ABS UL94-V0, white
Protection class:
IP30
Dimensions (w x h x d):
80 x 80 x 25 mm
Mounting:
Wall-mount
Weight:
75 g

Electrical connections

Supply voltage:
From M-Bus
M-Bus slave port:
Screw terminal. Cable 0.25-1.5 mm², 0.5 Nm tightening torque

Electrical characteristics

Nominal voltage:
21-42 VDC

Environmental specifications

Operating temperature:
-20 °C to +55 °C
Operating humidity:
0 to 95 %, no condensation
Operating altitude:
0-2000 m
Pollution degree:
Degree 2
Usage environment:
Indoors
Storage temperature:
-40 °C to +85 °C
Measurement range, temperature sensor:
-20 °C to +55 °C
Measurement range, humidity sensor:
0 % RH to 100 % RH

Temperature sensor, margin of error

Temperature: 10 °C to 30 °C:
±0.2°C
Temperature: 0 °C to 10 °C:
±0.4°C
Temperature -10 °C to 0 °C:
±0.5°C
Temperature: below -10 °C or above 30 °C:
±1.5°C

Humidity sensor, margin of error

Humidity: 10 % RH to 90 % RH:
±2% RH
Humidity: below 10 % RH or above 90 % RH:
±4% RH

User interface

LCD diplay:
No
Momentary values:
Temperature, humidity, status
Historic values:
Average value over the last hour and last day

M-Bus

Interfaces:
M-Bus slave
M-Bus standard:
EN 13757

Wireless M-Bus

Integrated M-Bus Master

Wireless M-Bus Receiver

M-Bus slave interface

M-Bus baud rate, slave port:
300 and 2400 bit/s
Nominal voltage, slave port:
21-42 VDC
Power consumption:
1T/1.5 mA
Addressing modes:
Primary, secondary
Default address:
0 (primary) and serial number (secondary)

General

Data storage (examples)

Mobile Network

Fixed Network (Ethernet)

Integration

Approvals

EMC:
EN 61000-6-2, EN 61000-6-3

Connections and Interfaces

Transmissions

For downloads, please visit our support site at: https://support.elvaco.com

Our website has gathered all resources you need to update, tune and troubleshoot your installations, such as:

  • Latest software versions
  • FAQs
  • Guides
  • In-depth technical information
  • Support forum

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