User Manual

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Building Technologies M-bus System CE1P5361en
HVAC Products Contents 08.02.2007
5.4 M-bus.............................................................................................................48
5.4.1 General..........................................................................................................48
5.4.2 Fundamentals................................................................................................48
5.4.3 Protection against transients .........................................................................50
5.4.4 Planning process...........................................................................................50
5.4.5 Sizing.............................................................................................................52
5.5 RS-485 port ...................................................................................................54
5.5.1 General..........................................................................................................54
5.5.2 Planning.........................................................................................................54
5.5.3 Protection against transients .........................................................................54
5.5.4 Electrical installation......................................................................................54
6 Communication..............................................................................................55
6.1 Communication between ACS7… and OZW….............................................55
6.1.1 Direct connection...........................................................................................55
6.1.2 Telephone connection ...................................................................................56
6.2 Communication with third-party systems.......................................................57
6.2.1 M-bus central units OZW10 and OZW111 ....................................................57
6.2.2 PC software...................................................................................................57
7 Technical data ...............................................................................................58
7.1 M-bus.............................................................................................................58
7.1.1 Specification ..................................................................................................58
7.2 RS-485 specification......................................................................................58
7.3 Copper cable, loop resistance.......................................................................58
7.4 Cable length charts........................................................................................59
7.5 Storage space requirements of M-bus devices .............................................61
7.5.1 General..........................................................................................................61
7.5.2 SONOGYR
®
energy WSF, WSG, WSJ .........................................................61
7.5.3 MEGATRON
®
2 ..............................................................................................62
7.5.4 VOLUTRON
®
2...............................................................................................62
7.6 Amount of storage space required by Siemeca™ AMR devices...................63
7.6.1 General..........................................................................................................63
7.6.2 MEGATRON
®
2 cooling energy / heat meters, VOLUTRON
®
2 water meters 63
7.6.3 Heat cost allocators MEMOTRON
®
2.............................................................64
7.6.4 Pulse adapter AEW36.2 ................................................................................64
8 Addendum .....................................................................................................65
8.1 Glossary ........................................................................................................65
8.1.1 Type references.............................................................................................65
8.1.2 Abbreviations.................................................................................................65
8.1.3 References ....................................................................................................66