User Manual

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Building Technologies M-bus System CE1P5361en
HVAC Products 8 Addendum 08.02.2007
Abbreviation Explanation
M-bus slave
Meter, controller, I/O or repeater with M-bus slave interface
M-bus slave interface
Bus connection for an M-bus slave
M-bus master
M-bus central unit with M-bus master interface
(e.g. OZW10 with WZC-P250 or OZW111)
M-bus master
interface
Bus control and bus power supply for M-bus
M-bus signal
converter
Signal converter with M-bus master interface
(e.g. WZC-P250)
M-bus repeater
Signal amplifier with M-bus slave and M-bus master inter-
face (e.g. WZC-P250); separates 2 M-bus segments
M-bus segment
Bus section; controlled and powered by the M-bus master
interface
M-bus system
All devices and connections that, logically and physically,
form an entity with the M-bus
M-bus central unit
Communication center for the M-bus system
(e.g. OZW10 or OZW111)
OLE
Object Linking and Embedding
OPC
OLE for Process Control
SMS
Short Message System
8.1.3 References
[1] The M-bus, A Documentation, M-bus Usergroup (download from the Internet
under www.m-bus.com/
)
8.2 Protection against transients
8.2.1 Components
 Every bus cable and the devices to be protected demand protective elements
matched to the relevant requirements. For this reason, only the tested components
listed below may be used
 For the protection of the M-bus devices, there are 2 types of transient charge
eliminators available:
Type 1: Consisting of base and plug-in unit, for general use
Type 2: Module, for exclusive use with M-bus devices that are already equipped
with fine protection.
Type Component Type (Phoenix) Part no. Use
1 Basic unit
Plug-in unit
UFBK BE
UFBK-M 2-PE 48AC-ST
27 83 09 5
28 17 06 8
All M-bus devices
2 Module
UBK 2-110
27 97 97 1 M-bus devices with
integrated fine pro-
tection
1)
.
1)
SONOGYR
®
energy, MEGATRON
®
2., RVD2…
For the protection of the devices with RS-485 (OZW10 and signal converter):
Type 3: Consisting of basic unit and plug-in unit.
Type Component Type (Phoenix) Part no. Use
3 Basic unit
Plug-in unit
UFBK BE
UFKB-M 2-PE 12DC-ST
27 83 09 5
28 17 03 9
OZW10 and WZC-
P… (only suited for
2-wire RS-485)