Short description
| Bus module | X20 Compact-S PLC base - backplane for Compact-S PLC and Compact-S PLC power supply module |
| Interfaces | 1x RS232 connection |
General information
| B&R ID code | 0xFC37 |
| Power consumption | |
| Bus | 0.55 W |
| Internal I/O | - |
| Additional power dissipation caused by actuators (resistive) [W] | - |
| Certifications | |
| CE | Yes |
| UKCA | Yes |
| CRA (Cyber Resilience Act) | In preparation |
| UL |
cULus E115267 Industrial control equipment |
| DNV |
Temperature: B (0 to 55°C) Humidity: B (up to 100%) Vibration: B (4 g) EMC: B (bridge and open deck) |
| LR | ENV1 |
| KR | Yes |
| ABS | Yes |
| BV |
EC33B Temperature: 5 - 55°C Vibration: 4 g EMC: Bridge and open deck |
I/O power supply
| Nominal voltage | 24 VDC |
| Permissible contact load | 10 A |
Electrical properties
| Electrical isolation | Bus not isolated from RS232 |
Operating conditions
| Mounting orientation | |
| Horizontal | Yes |
| Vertical | Yes |
| Installation elevation above sea level | |
| 0 to 2000 m | No limitation |
| >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 |
| Vertical mounting orientation | -25 to 50°C |
| Derating | - |
| Storage | -40 to 85°C |
| Transport | -40 to 85°C |
| Relative humidity | |
| Operation | Up to 100%, condensing |
| Storage | 5 to 95%, non-condensing |
| Transport | 5 to 95%, non-condensing |
Mechanical properties
| Note | Left and right X20 end cover plates included in delivery |
| Pitch | 37.5+0.2 mm |
Material number:
X20cBB52Description:
- Base for all X20 Compact-S CPUs
- RS232 connection

The bus module is the base for all X20 Compact-S controllers.
The left and right end cover plates are included in delivery.
| Automation Studio HW Upgrades | Version (Date) | Download |
|---|---|---|
| V4.8 HW Upgrade (X20cBB52) | EXE / 444 KB |
| Documentation | Version (Date) | Download |
|---|---|---|
| Data sheet X20(c)BB52 | PDF / 401 KB | |
| X20 System User´s Manual | PDF / 49 MB |
| E-CAD (Electro or EPLAN Templates) | Version (Date) | Download |
|---|---|---|
| Makro-/Artikeldaten 4.0.0 (X20cBB52) | EXE / 558 KB | |
| X20 EPLAN P8 from V2.4 | EXE / 160 MB |
| M-CAD (Mechan. Templates) | Version (Date) | Download |
|---|---|---|
| 3D File DXF/STEP X20BB2x/5x/80 | ZIP / 920 KB |