Lenz Digital plus BM2 Mode D'emploi page 23

Compared to the simple BM1, the BM2 module has the following advantages:

In addition to signal stopping, "Slow approach" (HP2) is also possible.

Easy control of the module using light signals and semaphore signals fitted with switches.

Even rear-powered (pushed) trains (push-pull trains, commuter trains, motor coaches)
stop at the right spot.
Depending on the signal setting, you can use the BM2 module to direct locomotives to stop (for
HP0), to pass (for HP1) or to slowly approach (for HP2). Of course, you can set the speed for the
slow approach in the locomotive decoder.
The BM2 has two control inputs. Depending on which one is active, the BM2 sends the information
"STOP or "SLOW APPROACH" to the decoder.
4.1 Rear-powered trains (pushed) and push-pull (commuter) trains? – no problem!
Would you also like to use the "Signal stop" and "Slow approach" functions for rear-powered
(pushed) trains and push-pull (commuter) trains?
Divide the section in front of the signal into a driving (A) and a braking section (B).
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E