B&R X20CS1012
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.
Lifecycle & replacement
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Technical specifications
Short description
| Communication module | 1 M-Bus master for controlling up to 64 slaves |
General information
| Diagnostics / Module run/error | Yes, using LED status indicator and software |
| Diagnostics / Data transfer | Yes, using LED status indicator |
| Diagnostics / M-Bus power supply | Yes, using LED status indicator and software |
| Power consumption / Bus | 0.2 W |
| Power consumption / Internal I/O | 0.35 W + (Number of slaves * 0.08 W) |
| Certifications / CE | Yes |
| Certifications / UKCA | Yes |
| Certifications / CRA (Cyber Resilience Act) | In preparation |
| Certifications / ATEX | Zone 2, II 3G Ex nA nC IIA T5 Gc IP20, Ta (see X20 user's manual) FTZÚ 09 ATEX 0083X |
| Certifications / UL | cULus E115267 Industrial control equipment |
| Certifications / HazLoc | cCSAus 244665 Process control equipment for hazardous locations Class I, Division 2, Groups ABCD, T5 |
| B&R ID code | 0xCABF |
| Status indicators | Data transfer, M-Bus power supply, operating state, module status |
| Module power dissipation | 0.55 W + (Number of slaves * 0.006 W) |
| Additional power dissipation caused by actuators (resistive) [W] | - |
| Insulation voltage between M-Bus and X2X Link | 500 VDC, 1 min |
Interfaces
| Interface / Type | M-Bus master |
| Interface / Variant | Connection via 12-pin terminal block X20TB12 |
| Interface / Max. distance | See section "M-Bus". |
| Interface / Transfer rate | 300, 2400 or 9600 bit/s |
| Interface / Number of slaves | Max. 64 |
| Interface / Internal resistance of master | Max. 6 Ω |
| Interface / Bus voltage mark at 0 mA | I/O supply voltage + (11.5 to 13.5) V |
| Interface / Bus voltage drop with space | 12 to 13.5 V |
| Interface / Overload shutdown | 250 mA ±10% |
| Interface / Bit threshold | 6 to 9 mA |
| Interface / Collision threshold | 24 to 36 mA |
| Interface / Received readjustment time | Max. 10 s |
| Interface / 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 |
| Mounting orientation / Vertical | Yes |
| Installation elevation above sea level / 0 to 2000 m | No limitation |
| Installation elevation above sea level / >2000 m | Reduction of ambient temperature by 0.5°C per 100 m |
| Degree of protection per EN 60529 | IP20 |
Ambient conditions
| Temperature / Operation / Horizontal mounting orientation | -25 to 60°C |
| Temperature / Operation / Vertical mounting orientation | -25 to 50°C |
| Temperature / Derating | - |
| Temperature / Storage | -40 to 85°C |
| Temperature / Transport | -40 to 85°C |
| Relative humidity / Operation | 5 to 95%, non-condensing |
| Relative humidity / Storage | 5 to 95%, non-condensing |
| Relative humidity / Transport | 5 to 95%, non-condensing |
Mechanical properties
| Note | Order 1x terminal block X20TB12 separately. Order 1x bus module X20BM11 separately. |
| Pitch | 12.5⁺⁰.² mm |
Documentation & CAD
Files hosted by B&R Industrial Automation; links open the official download page.
Datasheets
Manuals
ECAD / EPLAN
Get a quote for a replacement
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Specifications from the official B&R product catalog. Always confirm against the datasheet for your exact revision.