Elvaco CMa10 User manual

CMa10/CMa11
Indoor temperature/humidity sensor, M-Bus
INTRODUCTION
CMa10/CMa11 is a 2-way M-Bus temperature/humidity
sensor developed for indoor use. The product is available with
(CMa10) or without (CMa11) LCD display.
For more information about the product, please visit the
Elvaco AB website, http://www.elvaco.com.
English
CONFIGURE SETTINGS VIA LDC DISPLAY*
CMa10 has two different display modes: the standard mode
and the setup mode. End-users will only have access to the
standard mode, which displays current sensor information. The
setup mode is entered using the SW1 push button (4) at the
back of the product and can be used to configure settings for
the sensor.
Standard mode
Push button SW2 on the front is used to display the next page,
and get information about average, maximum and minimum
values as well as messages.
MOUNTING
The sensor is mounted on a wall by using the holes on the
product rear cover.
M-BUS
M-Bus is a multi-drop 2-wire bus with no polarity. Use a cable
with an area of 0.25-1.5 mm2 to connect CMa10/CMa11 to
a master device. Remove the rear cover. Slide and hold the
M-Bus connector (5) to the right, connect the two wires and
slide the terminal back into position.
OVERVIEW
1. LCD display*
2. Push button (SW2)*
3. NFC antenna
CONFIGURE SETTINGS VIA NFC
CMa10/CMa11 is equipped with an NFC antenna, which can be
used to read current settings or configure a device. Please refer
to the user’s manual for more information on how to use NFC.
FACTORY DEFAULT RESET
In order to reset CMa10 to factory default settings, enter the
setup mode and navigate to “Total Reset”. Select “y”.
Both CMa10 and CMa11 can be reset to factory default settings
via M-Bus command. Please refer to the “Application reset”
command in the user’s manual for more information.
Below, the factory default settings for CMa10 and CMa11 are
listed.
IMPORTANT
• Avoid mounting the product near supplementary heat
sources, such as kitchen stoves, or in direct sunlight.
• Make sure to mount the product at least 1.5 meters
from the floor and at least 1 meter from the nearest
radiator.
• Do not mount the product on an external wall or near a
door. If mounted over a conduit pipe, make sure that the
pipe is filled to prevent air flow.
DEMOUNTING
To demount the sensor device, carefully insert the end of a
screwdriver in the upper part of one of the enclosure bottom
holes, as illustrated below.
IMPORTANT
• Each CMa10/11 sensor must use a unique secondary
or primary address (depending on the addressing mode
set).
• Make sure to measure the voltage over the M-Bus
connector to verify that the M-Bus master has been
connected properly. The voltage should be in the range
of 21-42 VDC.
Setup mode
The setup mode is entered by pressing and holding push
button SW1 (4) for 5 seconds (when LCD display is off). The
next page is displayed by pressing SW1 for 2 seconds. To
configure the value of a field, press push button SW2. If there
are more than one configurable field on a page, push button
SW1 is used to switch between them.
Factory default settings
M-Bus baud rate 2400 Bit/s
M-Bus primary address 0
M-Bus secondary address Serial number
LCD contrast* 52
4. Push button (SW1)
5. M-Bus connector
6. Serial number
IMPORTANT
• If setup lock is enabled, the device cannot be unlocked
again.

Item number Description
1050131 CMa10 Indoor temperature/humidity sensor, M-Bus,
with display
1050133 CMa11 Indoor temperature/humidity sensor, M-Bus
CONTACT INFORMATION
Elvaco AB Technical support:
Phone: [phone]
E-mail: [email protected]
Online: www.elvaco.com
TECHNICAL SPECIFICATIONS
Mechanics
Protection class IP30
Dimensions (w x h x d) 80 x 80 x 25 mm
Weight 75 g
Mounting Wall-mount
Electrical connections
Supply voltage From M-Bus
M-Bus slave port Screw terminal/spring terminal solid wire
0.25-1.5 mm2
Electrical characteristics
Nominal voltage 21-42 VDC
User interface
Push button SW1 Enter setup mode, next page in setup
mode.
Push button SW2* Next page in standard mode, edit
configurable field in setup mode
LCD display CMa10: Yes, CMa11: No
Momentary values Temperature, humidity, status
Historic values Average values over the last hour/day
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
Approvals
EMC EN 61000-6-2, EN 61000-6-3
ORDERING INFORMATION
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.
TROUBLESHOOTING
Product does not respond to M-Bus master
Please verify that:
• Voltage over M-Bus connector is in the range of 21-42
VDC.
• The product uses a unique primary/secondary address
(depending on addressing mode set).
• The product and the M-Bus master uses the same baud
rate.
CMa10 does not display any information
The problem might be a result of the LCD contrast being
set too low. The value can be configured by using the M-Bus
command “Set LCD contrast” (see user’s manual for more
information). By performing a factory reset CMa10 will return to
its original LCD contrast settings.
Temperature value is inaccurate
Although the temperature sensor is normally very accurate, an
incorrect positioning of the product can sometimes result in
unintended temperature variations. When mounting the sensor,
please verify that:
• The product is not mounted near any heat or cold
sources.
• The product is not mounted in direct sunlight
• The product is not mounted in a spotlight beam.
*Only applicable to CMa10