Bachmann BEM211 | High-Speed Bus Expansion Module for M1

Bachmann BEM211 Bus Expansion Module – Product Description

Description

The Bachmann BEM211 is a compact bus expansion master module built for high-speed communication with distributed I/O units. It provides a fast, reliable interface that extends the M1 system up to three meters without compromising response time. Moreover, the module allows users to access distributed stations exactly as if they were local, which simplifies configuration and reduces engineering effort. Its RJ45-based wiring shortens installation time and therefore helps minimize project costs.

Overview

Designed to maintain the performance of local I/O, the BEM211 supports up to six distributed substations connected in a daisy-chain topology. In addition, each substation can operate up to fifteen M200 I/O modules, offering excellent scalability. The system achieves less than 1.5 µs access time, enabling precise synchronization between controllers and field devices. This low latency makes the BEM211 ideal for applications that depend on fast data availability and consistent timing.

Technical Data

Model: BEM211
System Compatibility: Bachmann M1 automation system
Module Type: Bus expansion master module
Number of Interfaces: 1 high-speed expansion interface
Maximum Substations: Up to 6 distributed substations
Distance Between Stations: Up to 3 m
Total System Length: Up to 18 m (daisy-chain)
Access Time: < 1.5 µs
Supported I/O Modules: Up to 15 M200 modules per substation
Cabling Type: RJ45 connectors
Signal Delay: Minimal, optimized for real-time systems
Weight: 449 g
Product Origin: Austria
Shipping Port: Xiamen
Payment: T/T, Western Union
Operating Temperature: −30 °C to +60 °C
Storage Temperature: −40 °C to +85 °C
Humidity: 5% to 95% non-condensing
Mounting: DIN rail or rack
Certifications: CE, UL, RoHS

FAQ

Q1: How many substations can the BEM211 support?
The module supports up to six substations connected in a daisy-chain layout.

Q2: What is the maximum distance between stations?
Each station can be placed up to three meters apart using RJ45 cabling.

Q3: Do I need a special protocol to access the distributed I/O?
No, the system allows direct access as if the modules were local.

Q4: How many standard modules can each substation handle?
Each substation can operate up to fifteen M200 standard modules.

Q5: What is the typical signal delay?
Access time remains below 1.5 microseconds, ensuring rapid communication.