FAQ
Q1: What is the Bachmann BEM211 used for?
It is a bus expansion master module that extends the M1/M200 controller backplane to distributed I/O substations up to 3 meters away, allowing additional I/O modules to be added without a local backplane slot.
Q2: How many substations can be connected?
Up to 6 distributed substations in a daisy-chain topology, each supporting up to 15 M200 standard modules.
Q3: What cable is used for the bus expansion?
CAT7 special cable with RJ45 connectors, with a maximum length of 3 meters between stations.
Q4: Does the BEM211 have an integrated power supply?
It supports an optional integrated power supply (18–34 VDC, 17 W nominal), providing +5 V, +15 V, and -15 V outputs to the expanded I/O modules.
Q5: What is the access time for the expanded I/O?
Less than 1.5 µs, ensuring the expanded I/O behaves as if it were local to the controller.
Q6: What is the relationship between BEM211 and BES212?
BEM211 is the bus expansion master module (1 interface); BES212 is the bus expansion slave module (2 interfaces) used at the substations.
Q7: What are the environmental ratings?
Operating temperature -30 °C to +60 °C, storage -40 °C to +85 °C, with CE, UKCA, and cULus approvals.
Q8: Is this a current or legacy product?
Bachmann maintains long product lifecycles. Confirm current product status and availability with Bachmann or an authorized distributor.
Q9: Where can I get technical documentation?
Official Bachmann electronic documentation, or an authorized distributor, is the authoritative source for specifications and compatibility.
Recommending Models