Elvaco CMeX30 Installation guide
INTRODUCTION
The CMeX30 is a digital to analog converter (D/A module) with an
output voltage range from 0-10 V or current output range from 4-20
mA. The value is set through standard M-Bus commands. CMeX30
has a high accuracy, is reliable and can be used for advanced control
processes. For a complete description of the product or for information
in Swedish, visit the Elvaco AB website, www.elvaco.com.
OVERVIEW
1. Serial number
2. M-Bus connector
3. Screw terminal for
4-20mA/0-10V
4. Power supply L
5. Power supply N
6. Status LED (green)
7. Error LED (red)
MOUNTING
The CMeX30 should be mounted on a DIN-rail. The metallic clip on the
bottom is used to mount and demount the unit from the DIN-rail. DIN-
rail enclosure must cover the terminals.
POWER SUPPLY
The installation must be performed by a qualied electrician or installer
with required knowledge. The power supply should be connected to
screw terminals (4) and (5). The voltage should be 100-240 VAC, 50/60
Hz. The power supply should be connected via a clearly marked switch
placed close to CMeX30, so the unit can be switched o during service
work.
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). Connect
the wiring to the connector (2).
IMPORTANT
• All connected M-Bus slave devices must have unique primary or
secondary M-Bus 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.
LED INDICATIONS
The product is equipped with a green and red LED. The green LED
shows the operation status of the product. When the green LED is
permanently on, the product is powered up and ready to use. When the
green LED is flashing, the product is communicating via M-Bus. The red
LED indicates that the M-Bus 2-wire is not properly connected.
Green LED
Mode Product state Visual
On The unit is in operation
mode
200 ms o/ 200
ms on/200 ms
o/ 200 ms on
The unit has received
M-Bus telegram
Red LED
Mode Product state Visual
On M-Bus missing
CONNECTION OF OUTPUT 0-10 V
CMeX30 can be connected to any analog voltage input that can handle
0-10 V. Connect the negative cable (signal GND) to the center terminal
of screw terminal (3), the signal is connected to the right terminal of
screw terminal (3).
CONNECTION OF OUTPUT 4-20 MA
CMeX30 can be connected to any passive current input that can handle
4-20 mA. Connect the signal cable for 4-20 mA to the left terminal
of screw terminal (3). Connect the negative cable (signal GND) to the
center terminal of screw terminal (3).
CMeX30
DIN-mounted M-Bus D/A module
© 2022, Elvaco AB. All rights reserved. The documentation and product are provided on an “as is” basis only and may contain deciencies or in-
adequacies. 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.
CMeX30 Quick manual A4 English
Document id: 1090065
Version: 3.2
Mechanics
Protection class IP20
Dimensions 90x65x36 mm
Weight 100 g
Connection M-Bus Pin terminal solid wire 0.6- 0.8 Ø mm
Mounting DIN mounted
Power supply Screw terminal cable 0.75-2.5 mm², 0.5 Nm
tightening torque
Electrical
Nominal voltage 100-240 VAC
Voltage range -10 % to +10 % of nominal voltage
Frequency 50/60 Hz
Power consumption (max) 2.5 W
Power consumption (nom) 1 W
Installation category CAT 2
Environmental
Operating temperature range -30 °C to +55 °C
Storage temperature range -40 °C to +85 °C
Pollution Degree 2
Operating altitude 0-2000 m
M-Bus
M-Bus standard EN 13757
M-Bus baud rate 300, 2400 Bit/s
M-Bus load 1T (1.5 mA)
Maximum cable length Is dependent of master
IR interface No
Analog output
Output types 4-20 mA and 0-10 V cannot be controlled
individually
Connection Pluggable screw terminal
Min input impedance 4-20 mA TBD
Max load current 0-10 V TBD
Approvals
EMC EN 61000-6-2, EN 61000-6-3
Safety EN 61010-1, CAT 2
Product Article number Description
CMeX30 1050014 DIN-mounted M-Bus D/A module
ORDERING INFORMATION
CONTACT INFORMATION
Elvaco AB Technical support:
E-mail: support @elvaco.com
Online: www.elvaco.com
TECHNICAL SPECIFICATIONS
TROUBLESHOOTING
CMeX30 does not respond to M-Bus master commands
Verify your M-Bus slave conguration and connection:
• Voltage over M-Bus connection should be between 21 VDC and 42
VDC. Red LED will indicate error.
• All M-Bus slaves connected to the M-Bus master must have
unique primary addresses or secondary addresses depending on
addressing mode.
• Verify M-Bus slave baud rate used by M-Bus master. M-Bus master
baud rate must be identical to M-Bus slave baud rate.
CMeX30 cannot control the connected unit
Disconnect the cables to the unit to be controlled, e.g. the actuator.
Measure the output with a multimeter while an M-Bus command is
sent to change the output. If this works, there is probably an error in the
connection to the input of the unit to be controlled.
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.
SIMPLIFIED DECLARATION OF CONFORMITY
Hereby, Elvaco declares that the product is in compliance with the
following directives:
EU:
- 2014/30/EU (EMC)
- 2014/35/EU (LVD)
- 2011/65/EU + 2015/863 (RoHS)
The complete Declaration of Conformity can be found at www.elvaco.
se/en > Search on product or article number.
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