MBUS-RELA4 - User manual
Table of Contents
Table of Contents 3
1 Notes and conventions 5
1.1 Aboutthisdocument ....................................... 5
1.2 Legalbasis............................................. 5
1.2.1 Placingonthemarket................................... 5
1.2.2 Copyrightprotection ................................... 5
1.2.3 Personnelqualification .................................. 5
1.2.4 Intendeduse........................................ 5
1.2.5 Exclusionofliability.................................... 5
1.2.6 Disclaimer......................................... 5
1.3 Symbols .............................................. 6
1.4 Fontconventions ......................................... 6
1.5 Numbernotation ......................................... 6
1.6 Safetyguidelines.......................................... 7
1.7 Scope ............................................... 7
1.8 Abbreviations ........................................... 7
2 Introducing the device 10
2.1 Generalinformation ........................................ 10
2.2 Delivery variants and scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Connectors............................................. 10
2.4 Firststeps ............................................. 11
2.4.1 Factorysetting ...................................... 11
2.5 Specifictroubleshooting...................................... 11
2.5.1 The device does not respond. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5.2 The current consumption is too high. . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.6 Typical application scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.6.1 Feed-inmanagement ................................... 12
2.6.2 Switching of appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.6.3 Hygienicflushing ..................................... 12
2.7 Technicaldata........................................... 12
2.7.1 Generalspecifications................................... 12
2.7.2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 M-Bus communication interface 14
3.1 Generalinformation ........................................ 14
3.2 SignallingontheM-Bus...................................... 14
3.3 AddressingtheMBUS-RELA4 .................................. 15
3.3.1 Primaryaddressing .................................... 15
3.3.2 Secondaryaddressing ................................... 15
3.4 M-Bus communication procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.4.1 Send/Confirmprocedure ................................ 16
3.4.2 Request / Response procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5 SupportedM-Bustelegrams.................................... 16
3.5.1 SND_NKE (Initialisation command) . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5.2 Slave-Select in secondary addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.5.3 SND_UD (Send user data to slave) . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.5.4 REQ_UD2 (Read user data class 2 by the slave) . . . . . . . . . . . . . . . . . . . . 17
3.6 Communication with the MBUS-RELA4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.6.1 Setting the primary address via SND_UD . . . . . . . . . . . . . . . . . . . . . . . . 17
3.6.2 Setting the baud rate via SND_UD . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.6.3 Setting the relay outputs via SND_UD . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.6.4 Reading the relay outputs via REQ_UD2 . . . . . . . . . . . . . . . . . . . . . . . . 19
3.6.5 Response telegram RSP_UD of the MBUS-RELA4 . . . . . . . . . . . . . . . . . . . 19
Frank Richter, 6 December 2022
©solvimus GmbH
Version: 1.3
Released
Page 3/21
UG_EN_MBUS-RELA4.pdf
