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Short description
Communication module 1 M-Bus master for controlling up to 64 slaves
General information
B&R ID code 0xCABF
Status indicators Data transfer, M-Bus supply, operating status, module status
Module run/error Yes, using status LED and software
Data transfer Yes, using status LED
M-Bus power supply Yes, using status LED and software
Power consumption
Bus 0.2 W
Internal I/O 0.35 W + (number of slaves * 0.08 W)
Module power dissipation 0.55 W + (number of slaves * 0.006 W)
Additional power dissipation caused by actuators (resistive) [W] -
CE Yes
ATEX Zone 2, II 3G Ex nA nC IIA T5 Gc
IP20, Ta (see X20 user's manual)
FTZÚ 09 ATEX 0083X
UL cULus E115267
Industrial control equipment
HazLoc cCSAus 244665
Process control equipment
for hazardous locations
Class I, Division 2, Groups ABCD, T5
Isolation voltage between M-Bus and X2X Link 500 VDC, 1 min
Type M-Bus master
Variant Connection made using 12-pin X20TB12 terminal block
Max. distance See section "M-Bus"
Transfer rate 300, 2400 or 9600 bit/s
Number of slaves Max. 64
Internal resistance of master Max. 6 Ω
Bus voltage mark at 0 mA I/O supply voltage (+ 11.5 to 13.5 V)
Bus voltage drop with space 12 to 13.5 V
Overload shutdown 250 mA ±10%
Bit threshold 6 to 9 mA
Collision threshold 24 to 36 mA
Received readjustment time Max. 10 s
Bus cable Shielded or unshielded
Electrical properties
Electrical isolation
M-Bus isolated from bus

M-Bus not isolated from I/O power supply
Operating conditions
Mounting orientation
Horizontal Yes
Vertical Yes
Installation elevation above sea level
0 to 2000 m No limitations
>2000 m Reduction of ambient temperature by 0.5°C per 100 m
Degree of protection per EN 60529 IP20
Ambient conditions
Horizontal mounting orientation -25 to 60°C
Vertical mounting orientation -25 to 50°C
Derating -
Storage -40 to 85°C
Transport -40 to 85°C
Relative humidity
Operation 5 to 95%, non-condensing
Storage 5 to 95%, non-condensing
Transport 5 to 95%, non-condensing
Mechanical properties
Note Order 1x X20TB12 terminal block separately
Order 1x X20BM11 bus module separately
Pitch 12.5+0.2 mm
  • Power supply for up to 64 slaves on the M-Bus
  • Decentralized use of the communication interface

The M-Bus master is designed as a single-width module and can be connected anywhere within the X20 I/O system. It can therefore be used decentrally for distributed topologies. The M-Bus master supports transfer rates of 300, 2400 and 9600 bit/s; up to 64 slaves supplied via M-Bus can be connected.

M-Bus (Meter-Bus) is a relatively simple fieldbus for recording consumption data, such as from electricity or heat meters. It is based on a reverse polarity protected two-wire line and works according to the master-slave principle.

Необходимые аксессуары
Bus modules
X20BM11 Базовый модуль X20, кодировка 24 В пост. тока, сквозная шина питания ввода/вывода
X20BM15 Базовый модуль X20, с переключателем номера узла, кодировка 24 В пост. тока, сквозная шина питания ввода/вывода
Terminal blocks
X20TB12 Клеммная колодка X20, 12 контактов, кодировка 24 В постоянного тока
E-CAD (Шаблоны Electro или EPLAN) Version (Date) Download
X20 EPLAN P8 from V2.4 EXE / 161 MB
M-CAD (Механические шаблоны) Version (Date) Download
3D File DXF/STEP X20 Electronic module ZIP / 10 KB
3D File STEP X20 I/O-Slice ZIP / 872 KB
Dimensions PDF X20 Electronic module PDF / 3 KB
Документация Version (Date) Download
Data sheet X20CS1012 PDF / 866 KB
X20 System User´s Manual PDF / 50 MB
Обновления Automation Studio HW Version (Date) Download
V2.7 HW Upgrade (X20CS1012) EXE / 2 MB
V3.0 HW Upgrade (X20CS1012) EXE / 4 MB
V4.0 HW Upgrade (X20CS1012) EXE / 2 MB
Сертификаты Version (Date) Download
244665 CSA HazLoc Certificate of Compliance X20, X67 PDF / 56 KB
E115267 UL CoC X20 PDF / 847 KB
FTZU 09 ATEX 0083X PDF / 697 KB

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