B&R X20BC0087 – Bus controller, modbus TCP/UDP slave
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Quick facts
| Availability | Confirmed on request |
| Category | Bus controllers |
| Lifecycle | Active |
| Warranty | 12-month (new) · 3-month (used/refurbished) |
| Datasheet | Manufacturer datasheet ↗ |
Shipping & availability
When can X20BC0087 be shipped?
X20BC0087 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.
Can I pick up X20BC0087 in person?
Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.
Is express delivery available?
Yes — mention it when you request a quote for X20BC0087 and we'll include express shipping options in our reply.
My factory is down and I need this urgently — can you help?
For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for X20BC0087, subject to availability and destination.
• Fieldbus: Modbus/TCP, Modbus/UDP
• I/O configuration via the fieldbus
• DHCP-capable
• Bootp-capable
• Integrated double switch for efficient cabling
• Configurable I/O cycle (0.5 to 4 ms)
• Response time: <1 to 8 ms (depending on the load on the integrated switch)
• Validity check for command sequences before execution
Established in 1979, the Modbus protocol has approved the use of Ethernet with both Modbus TCP and Modbus/UDP. Today, Modbus TCP is an open Internet draft standard introduced by Schneider Automation to the Internet Engineering Task Force (IETF), the organization responsible for Internet standardization. The Modbus services and object model have been preserved since the original version and left unchanged for use with the TCP/IP transmission medium.
Modbus/UDP differs from Modbus TCP in that it uses connectionless communication via UDP/IP. The advantages of faster and easier communication with UDP/IP also brings with it the disadvantage of requiring error detection and correction in the application layer.
This bus controller makes it possible to connect X2X Link I/O nodes to Modbus via Ethernet. The bus controller can be operated on B&R controllers through the use of Automation Studio or on third-party systems with Modbus TCP or -UDP master functionality.
With multifunction modules, the bus controller supports only the default function model in the event of automatic configuration by the bus controller (see the respective module description).
All other function models are supported when configured accordingly in Automation Studio V4.3 or later.
Automation Studio kann kostenlos von der B&R Webseite www.br-automation.com heruntergeladen werden. Die Evaluierungslizenz darf unentgeltlich zur Erstellung vollständiger Konfigurationen der Feldbus Bus Controller benützt werden.
Accessories
Required accessories (order separately)
| X20PS9402 | System modules for bus controllers — Supply for the bus controller, X2X Link and internal I/O supply; Low-cost supply module for small X20 system; Feed and bus controller / X2X… |
| X20PS9400 | System modules for bus controllers — Supply for the bus controller, X2X Link and internal I/O supply; Feed and bus controller / X2X Link supply electrically isolated; Redundanc… |
| X20BB80 | System modules for bus controllers — Bus base The following modules are used on the bus module: Base module (BC, HB, etc.); Supply module The left and right end cover plates ar… |
| X20TB12 | Terminal blocks — Tool-free wiring with push-in technology; Simple wire release using lever; Ability to label each terminal; Plain text labeling also possibl… |
Specifications
Short description
| Bus controller | Modbus TCP/UDP slave |
General information
| Diagnostics – Module status | Yes, using LED status indicator and software |
| Diagnostics – Bus function | Yes, using LED status indicator and software |
| Power consumption – Bus | 2 W |
| Certifications – CE | Yes |
| Certifications – UKCA | Yes |
| Certifications – CRA (Cyber Resilience Act) | Evaluation ongoing |
| 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 |
| Certifications – DNV | Temperature: B (0 to 55°C); Humidity: B (up to 100%); Vibration: B (4 g); EMC: B (bridge and open deck) |
| Certifications – CCS | Yes |
| Certifications – LR | ENV1 |
| Certifications – KR | Yes |
| Certifications – ABS | Yes |
| Certifications – BV | EC33B ; Temperature: 5 - 55°C; Vibration: 4 g; EMC: Bridge and open deck |
| Certifications – KC | Yes |
| B&R ID code | 0x227C |
| Status indicators | Module status, bus function |
| Additional power dissipation caused by actuators (resistive) [W] | - |
Interfaces
| Transfer – Physical layer | 10BASE-T/100BASE-TX |
| Transfer – Half-duplex | Yes |
| Transfer – Full-duplex | Yes |
| Transfer – Autonegotiation | Yes |
| Transfer – Auto-MDI/MDIX | Yes |
| Min. cycle time " data-placement="top" data-html="true" data-container="body" data-content="The minimum cycle time specifies how far the bus cycle can be reduced without communication errors occurring."> – Fieldbus | 1 ms |
| Min. cycle time " data-placement="top" data-html="true" data-container="body" data-content="The minimum cycle time specifies how far the bus cycle can be reduced without communication errors occurring."> – X2X Link | 500 μs |
| Fieldbus | Modbus TCP/UDP slave |
| Variant | 2x shielded RJ45 (switch) |
| Line length | Max. 100 m between 2 stations (segment length) |
| Transfer rate | 10/100 Mbit/s |
| Synchronization between bus systems possible | No |
Electrical properties
| Electrical isolation | Modbus isolated from bus and I/O |
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 – Horizontal mounting orientation | -25 to 60°C |
| Temperature – 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 power supply module X20PS9400 or X20PS9402 separately. ; Order 1x bus base X20BB80 separately. |
| Pitch " data-placement="top" data-html="true" data-container="body" data-content="Pitch is based on the width of bus base X20BB80. In addition, power supply module X20PS9400 or X20PS9402 is always required for the bus controller."> | 37.5 +0.2 mm |
Downloads & documentation
Official documents from B&R, downloaded directly from the manufacturer.
Data sheets & manuals
| Data sheet X20(c)BC0087 | PDF · 2 MB · 2.40 (08/05/2025) - EN |
| Modbus/TCP Bus Controller User's manual | PDF · 22 MB · 2.40 (01/26/2026) - EN |
| X20 Package leaflet ATEX/CSA | PDF · 2 MB · 1.4 (09/17/2024) |
| X20 System User´s Manual | PDF · 50 MB · 4.40 (03/10/2026) - EN |
CAD & dimension drawings
| 3D File STEP/DXF X20BC and X20IF Module | ZIP · 1 MB · 2.3 (09/19/2019) |
Certificates (16)
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