elvaco CMeX20WCMeX20W External Wireless M Bus Instructions
- July 26, 2024
- elvaco
Table of Contents
elvaco CMeX20WCMeX20W External Wireless M Bus Instructions
INTRODUCTION
CMeX20W enables ABB electricity meters with IR interface to communicate via Wireless M-Bus. The communication is automatically configured between CMeX20W and the ABB meter. CMeX20W allows transmission of meter values from the ABB meter via a standardized interface that can be handled by all receivers on the market that complies with the M-Bus standard.
OVERVIEW
- DIN lock
- Antenna connection
- Serial number CMeX20W
- Power supply L
- Power supply N
- IR interface
- LED
- Push button
MOUNTING
CMeX20W should be mounted on a DIN rail, on the left side of the ABB electricity meter. The metallic clip on the bottom is used to mount and demount the unit from the DIN-rail. For safety reasons, a DIN-rail enclosure must cover the terminals.
If assembling the CMeX20w in an OVC 3 environment, it is required to install an external surge arrester in front of the product.
CMeX20W should be equipped with an antenna mounted on the SMA connector (2). The included mini stub antenna works in most installations. However, if the CMeX20W is mounted in a metal cabinet, it may require an external antenna that can be ordered from Elvaco.
POWER SUPPLY
The installation should be performed by a qualified electrician or an installer with the required knowledge. The power supply must be protected with a maximum 10 A circuit breaker of characteristic C or slow blow fuse. The power supply should be connected via a clearly marked, easily accessible and nearby switch so the unit can be switched off during service work.
Main supply should be connected to screw terminals (4) and (5). Main supply voltage should be in the range of 220-240 VAC, 50 Hz.
OPERATION AND FUNCTION
After power up, the CMeX20W will try to communicate via the IR port with the electricity meter that is mounted on the right side of the product. Before communication is established with the meter, the LED (7) lights up red. In this mode, no wireless M-Bus messages are sent from CMeX20W.
CMeX20W can be configured to either send encrypted or unencrypted messages. By pressing the push button (8) for at least 5 seconds, the transmission is changed between encrypted and unencrypted mode. In encrypted mode, the LED (7) lights up yellow and in unencrypted mode, the LED lights up green.
CMeX20W uses the Wireless M-Bus mode T1. The product supports both encrypted and unencrypted messaging. Encrypted mode means that the Wireless M-Bus messages are protected with a 128 bit AES key.
When CMeX20W has created a connection to the electricity meter, the LED changes color from red to green in unencrypted mode, and yellow in encrypted mode. The CMeX20W now starts to send readings once every 16 seconds. The LED flashes (turns off for 500 ms) every time a wireless message is sent.
When a meter change is performed, the CMeX20W is automatically configured. Wait for green or yellow LED to light up which indicates that CMeX20W has contact with the new meter.
TROUBLESHOOTING
Red LED is on, no wireless messages are sent
This may be due to the following:
- ABB meter is not powered up.
- The distance between CMeX20W and the electricity meter is too long.
- The ABB meter is configured incorrectly or is of the wrong type. CMeX20W works on max 9600 baud.
The master does not receive any telegram from the product
This may be due to the following:
- The CMeX20W or ABB meter is not powered up.
- The antenna on CMeX20W is not installed correctly, or an external antenna is required to reach the receiver.
- The receiver is not configured correctly, mode T must be selected.
- The antenna on the receiver is not optimally positioned.
LED INDICATIONS
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.
ORDERING INFORMATION
TECHNICAL SPECIFICATIONS
**Mechanics
**
**Electrical connections
**
**Electrical characteristics
**
**User interface
**
**M-Bus
**
**Integration
**
**Factory default
**
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)
– 2014/53/EU (RED)
– 2011/65/EU + 2015/863 (RoHS)
UK:
– 2017 No. 1206
– 2016 No. 1091
– 2016 No. 1101
– 2012 No. 3032
The complete Declaration of Conformity can be found at www.elvaco. se/en > Search on product or item number.
CONTACT INFORMATION
Elvaco AB Technical support:
E-mail: support@elvaco.com
www.elvaco.se/en
© 2024, 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.
References
Read User Manual Online (PDF format)
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