Solvimus MBUS-RELA4 User Manual

Relay outputs for the m-bus

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MBUS-RELA4 - USER MANUAL

MBUS-RELA4

Relay outputs

for the M-Bus

Version: 1.3

Date: 6 December 2022

Authors:

Remo Reichel, Frank Richter

solvimus GmbH

Ratsteichstr. 5

98693 Ilmenau

Germany

solvimus GmbH – Ratsteichstr. 5 – 98693 Ilmenau – Germany

Telephone: +49 3677 7613060 – Fax: +49 3677 7613069 – E-Mail: info@solvimus.de

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Page 1 Version: 1.3 Date: 6 December 2022 Authors: Remo Reichel, Frank Richter solvimus GmbH Ratsteichstr. 5 98693 Ilmenau Germany solvimus GmbH – Ratsteichstr. 5 – 98693 Ilmenau – Germany Telephone: +49 3677 7613060 – Fax: +49 3677 7613069 – E-Mail: info@solvimus.de...
Page 2 MBUS-RELA4 - User manual Page intentionally left blank Page 2/21 Version: 1.3 Frank Richter, 6 December 2022 UG_EN_MBUS-RELA4.pdf Released © solvimus GmbH...
Page 3: Table Of Contents
3.2 Signalling on the M-Bus ........3.3 Addressing the MBUS-RELA4 ........
Page 4 MBUS-RELA4 - User manual 4 Accessory Page 4/21 Version: 1.3 Frank Richter, 6 December 2022 UG_EN_MBUS-RELA4.pdf Released © solvimus GmbH...
Page 5: Notes And Conventions
GmbH. Violations will result in a claim for damages. The solvimus GmbH reserves the right to provide for any alterations or modifications that serve to increase the efficiency of technical progress. All rights in the event of the granting of a patent or the protection of a utility model are reserved by solvimus GmbH.
Page 6: Symbols
MBUS-RELA4 - User manual Firefox is a trademark of the Mozilla Foundation in the U.S. and other countries. Chrome™ browser is a trademark of Google Inc. Microsoft Excel is a trademark of the Microsoft group of companies. 7-Zip Copyright (C) 1999-2022 Igor Pavlov.
Page 7: Safety Guidelines
When handling the components, ensure that everything in the vicinity is well earthed (personnel, work- place and packaging). Do not touch electrically conductive components, e.g. data contacts. 1.7 Scope This documentation describes the device manufactured by solvimus GmbH, Ilmenau, and stated on the title page. 1.8 Abbreviations...
Page 8 MBUS-RELA4 - User manual Table 2 – Continued from previous page Abbreviation Meaning Clear to send D0 interface (optical interface, IEC 62056-21) Direct Digital Control DHCP Dynamic Host Configuration Protocol Digital Input, digital input terminal Data information field DIFE Data information field extensions Deutsches Institut für Normung, German Institute for Standardization...
Page 9 MBUS-RELA4 - User manual Table 2 – Continued from previous page Abbreviation Meaning Random Access Memory REQ_UD Request User Data (Class 1 or 2) Requests For Comments RSP_UD Respond User Data RSSI Received Signal Strength Indicator Real-Time Clock RTOS Real-Time Operating System...
Page 10: Introducing The Device
The M-Bus is defined in the standard EN 13757. It establishes an own physics as well as an own protocol. The MBUS-RELA4 acts like a slave in the M-Bus network and can be controlled by a master according to EN 13757-2/-3. Four bistable relays switch corresponding to the command from the master and preserve their state even during loss of communication.
Page 11: First Steps
• Baud rate: 2400 baud 2.5 Specific troubleshooting In case the MBUS-RELA4 does not work as described in this document, it is useful to locate the malfunction in order to resolve the issue and to recover the full functionality again.
Page 12: The Current Consumption Is Too High
(see Section 1.2.3). The MBUS-RELA4 is able to switch loads from a distance. For instance, it is possible to activate or deactivate large consumers like storage water heaters, depending on the time of day or state of the network.
Page 13: Electrical Specifications
MBUS-RELA4 - User manual 2.7.2 Electrical specifications Power supply The device is supplied by the M-Bus (pin assignment see Section 2.3): • Voltage: 10-42 VDC according to EN 13757-2, screw terminals ( 2.5 mm , tightening torque 0.5 Nm) • Power supply via M-Bus •...
Page 14: Bus Communication Interface
The M-Bus follows the principle of request-response, i.e. the master initiates the communication by a re- quest/command which is then answered/confirmed by the slave. Spontaneous data transmission on the part of the slaves is not allowed. Alternatively, the M-Bus in the MBUS-RELA4 can operate according to the Send-Confirm principle.
Page 15: Addressing The Mbus-Rela4
0, usually 12-30 V. Unit of standard load (see above) Table 5: M-Bus specific terms 3.3 Addressing the MBUS-RELA4 The MBUS-RELA4 offers two options for addressing on the M-Bus: • Primary addressing • Secondary addressing 3.3.1 Primary addressing When using primary addressing, up to 251 M-Bus slaves can be addressed directly on the M-Bus. Alongside...
Page 16: M-Bus Communication Procedures
• SND_NKE • SND_UD 3.4.2 Request / Response procedure In the Request / Response procedure, the MBUS-RELA4 replies on the request of the M-Bus master with a response telegram containing the requested data. An example for that is the following telegram: •...
Page 17: Slave-Select In Secondary Addressing
The SND_NKE is not contained in the examples. 3.6.1 Setting the primary address via SND_UD This call assigns a new primary address to the MBUS-RELA4. The MBUS-RELA4 is selected with its old primary address. Adhering to EN 13757, the acknowledgement contains the single character 0xE5 .
Page 18: Setting The Baud Rate Via Snd_Ud
Table 9: Setting the baud rate in primary addressing Response of the MBUS-RELA4: 0xE5 3.6.3 Setting the relay outputs via SND_UD The relay outputs of the MBUS-RELA4 are set with a SND_UD telegram. Adhering to EN 13757, the acknowledgement contains the single character 0xE5 . Byte no.
Page 19: Reading The Relay Outputs Via Req_Ud2
Response of the MBUS-RELA4: 0xE5 3.6.4 Reading the relay outputs via REQ_UD2 The relay outputs and the state of the MBUS-RELA4 are read out via a REQ_UD2 telegram. The response of the MBUS-RELA4 is a RSP_UD (see Section 3.6.5). Byte no.
Page 20 MBUS-RELA4 - User manual Table 12 – Continued from previous page Byte no. Size (bytes) Value (HEX) Description Data information field extension (DIFE): tariff 2/relay 2 Value information field (VIF) Value information field extension (VIFE): digital input Value: read back state relay 2...
Page 21 MBUS-RELA4 - User manual 4 Accessory The usage of accessories not recommended is at your own risk. It is imperative to mind Section 1.2.5. Frank Richter, 6 December 2022 Version: 1.3 Page 21/21 © solvimus GmbH Released UG_EN_MBUS-RELA4.pdf...