Elvaco CMa10 User manual

INTRODUCTION
The CMa10/CMa11 is a 2-way M-Bus communicating temperature and
humidity sensor for indoor use.
For a complete description of the product or for information in Swedish,
visit the Elvaco AB website, www.elvaco.com.
OVERVIEW
CMa10/11
Indoor M-Bus temperature and humidity sensor
1. Push-button (SW2) (CMa10)
2. Display (CMa10)
3. Push-button (SW1)
4. M-Bus in
5. Serial number (secondary
address)
6. Do not use for mounting
MOUNTING
When mounting the CMa10/CMa11, avoid rooms with a lot of
supplementary heat, such as kitchens or south facing rooms. Position
the sensor away from direct sunlight. Avoid placing on an external wall
or near an external door. Make sure that the sensor is not positioned
closer than 1 m from the nearest radiator and at least 1.5 m above the
floor. The CMa10/CMa11 can be mounted directly on the wall, or over a
mounting box. If the CMa10/CMa11 is placed over a conduit pipe, it is
recommended to fill the pipe to prevent air flow.
Remove the rear cover to connect the M-Bus 2-wire interface.
IMPORTANT
• Do not use mounting holes (6) as shown in overview.
• If the product should be demounted from the wall, use a
screwdriver to separate the product from the rear cover. The
screwdriver should be inserted carefully in the upper part of the
holes.
M-BUS 2-WIRE BUS
M-Bus is a multi-drop 2-wire bus with no polarity. Use a cable of area
0.25-1.5 mm2, e.g. a standard telephone cable (EKKX 2x2x0.5).
Demount the M-Bus terminal (4) by sliding the terminal to the right.
Connect the incoming wiring to the terminal and slide back in position.
IMPORTANT
• All connected M-Bus slave devices must have unique M-Bus
secondary or primary addresses depending on addressing mode.
• Measure voltage over M-Bus slave connection to verify M-Bus
master connection. Voltage should be between 21-42 VDC.
CONFIGURE USING LCD DISPLAY (CMA10)
The display shows current sensor information and is also used to
change and view the CMa10 configuration, i.e. M-Bus primary and
secondary addresses. End users only have access to the Standard
menu. The Setup menu can only be entered using the push-button SW1
on the rear of the product.
Standard menu
Push-button SW2 on the front is used for changing display page,
resetting received messages and average values which can be viewed
by the end user. Enter next page by pressing push-button SW2.

© 2016, Elvaco AB. All rights reserved. The documentation and product are provided on an “as is” basis only and may contain deficiencies or
inadequacies. Elvaco AB takes no responsibility for damages, liabilities or other losses by using this product. No part of the contents of this
manual may be transmitted or reproduced in any form by any means without the written permission of Elvaco AB. Printed in Sweden.
CMa10, CMa11 Quick manual A4 English
Document id: 1090025
Version: 3.0
Setup menu
From the Standard menu, enter the Setup menu by pressing the push-
button SW1 for 5 seconds. Change values by pressing push-button
SW2. Change page by pressing SW1 for 2 seconds. If more than one
option can be set on one page, press SW1 once for a short time to
configure the next option.
RESET TO FACTORY DEFAULT
In order to reset the product configuration to factory default, navigate
to “Total Reset” in the Setup menu and select “y”. Reset to factory
defaults can also be made using the M-Bus command Application reset,
see CMa10/CMa11 User Manual.
TROUBLESHOOTING
Product does not respond to M-Bus master commands
Please verify your M-Bus slave configuration and connection:
• Voltage over M-Bus connection should be between 21-42 VDC.
• All M-Bus slaves connected to the M-Bus master must have
unique primary or secondary addresses depending on which
addressing mode is used.
• Verify M-Bus slave baud rate used by M-Bus master. M-Bus
master baud rate must be identical to the M-Bus slave baud rate.
No information visible on the display
This problem can be a result of setting the LCD contrast too low.
Change the LCD contrast value by issuing the M-Bus Command “Set
LCD contrast” or “Application reset”, see CMa10/CMa11 User Manual.
Temperature value is inaccurate
The temperature sensor is very accurate, but incorrect positioning of
the product may result in unintended temperature variations. Please
take the following in consideration when mounting the product:
• Do not mount the product close to heat sources (front and rear).
• Do not mount the product in direct sunlight.
• Do not mount the product in the area of a spotlight beam.
TECHNICAL SPECIFICATIONS
Mechanics
Protection class IP20
Dimensions 80x80x28 mm
Weight 75 g
Connection M-Bus Screw terminal/Spring terminal solid wire
0.25-1.5 mm²
Mounting Wall mounted
Electrical
Power supply 21-42 VDC through M-Bus connection,
independent of the wiring polarity
Power consumption 1.5 mA M-Bus 1T
Environmental
Operating temperature range CMa10: 0 °C to +50 °C
CMa11: -20 °C to +55 °C
Storage temperature range -40 °C to +85 °C
Sensor accuracy
Temperature 10 to 30 °C +/- 0.2 °C
Humidity 10 to 90 % RH +/- 2 % RH
M-Bus
M-Bus standard EN 13757
M-Bus baud rate 300, 2400 Bit/s
M-Bus commands SND_UD, SND_NKE, REQ_UD2
Addressing modes Secondary, primary
Approvals
EMC EN 61000-6-2, EN 61000-6-3
Factory defaults
M-Bus baud rate 2400 Bit/s
M-Bus primary address 0
M-Bus secondary address Serial number
LCD contrast 52
Product Part number Description
CMa10 1050024 M-Bus communicating temperature and
humidity sensor for indoor use. With
LCD display.
CMa11 1050054 M-Bus communicating temperature and
humidity sensor for indoor use.
ORDERING INFORMATION
CONTACT INFORMATION
Elvaco AB Technical support:
Phone: [phone]
E-mail: support @elvaco.com
Online: www.elvaco.com
SAFETY
The warranty does not cover damage to the product caused by usage
in any other way than described in this manual. Elvaco AB can not be
liable for personal injury or property damage caused by usage in any
other way than described in this manual.
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unityharmonizationlegislation:
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bilityofthemanufacturer:
a,Sweden.
unityharmonizationlegislation:
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documents:
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R
MITY
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bilityofthemanufacturer:
a,Sweden.
unityharmonizationlegislation:
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documents:
R
MITY
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bilityofthemanufacturer:
a,Sweden.
unityharmonizationlegislation:
e
documents:
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