Q1: What is the Bachmann BES212 used for?
It is a bus expansion slave module that works with the BEM211 master module to extend 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: What is the difference between BES212 and BES212/N?
The BES212 (00012847-00) is the slave module without an integrated power supply. The BES212/N (00012848-00) includes an integrated power supply (18–34 VDC, 17 W nominal) for the connected substation.
Q3: How many substations can be connected?
Up to 6 distributed substations in a daisy-chain topology, each supporting up to 15 M200 standard modules.
Q4: What cable is used for the bus expansion?
CAT7 special cable with RJ45 connectors, with a maximum length of 3 meters between stations.
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: Does the BES212 have an integrated power supply?
No. The BES212 requires power from the substation backplane. For an integrated power supply, choose the BES212/N variant.
Q7: What are the environmental ratings?
Operating temperature -30 °C to +60 °C, storage -40 °C to +85 °C, with CE, cULus, and CCC approvals.
Q8: 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.
Q9: Is this a current or legacy product?
Bachmann maintains long product lifecycles. Confirm current product status and availability with Bachmann or an authorized distributor.
Q10: Where can I get technical documentation?
Official Bachmann electronic documentation, or an authorized distributor, is the authoritative source for specifications and compatibility.
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