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Lenz
Automatic Braking Control (ABC)

ABC: Automatic Braking Control

Together with GOLD and SILVER decoders, the new ABC (Automatic Breaking Control) technology facilitates the hardware-oriented controlling of locomotives. With little effort, ABC accomplishes just what model railway enthusiasts crave: precise on-the-spot stopping in front of signals and passage in the opposite direction:

  • BM1 facilitates stopping in front of signals
  • BM2 facilitates stopping or slow approach in front of signals
  • BM3 facilitates assembly of automatic block sections

ABC modules serve to influence track sections in front of signals. Direction-dependent information on the signal status is fed to the locomotive decoder.

What else is ABC capable of?

While the locomotive is located in the asymmetrical voltage sections:

  • all functions can still be switched
  • programming in operational mode (PoM) is possible
  • you can drive reverse away again from the signal
  • shunting is possible
  • driving over sectioning points does not cause short circuits

"On the right" means "On the right"

When using the BM modules "on the right" means that it is always the right rail in the direction of travel where a rail-break is made when a driving or braking section is defined. Make breaks in the right rail at the beginning and at the end of the braking section. Alternatively, you can use an insulating track connector if there is a track joint at the point in question.

Model Description Discount Add Cart
Voltage Detection
22600 1 in stock

BM1 Braking Module

The track voltage to the track section in front of the signal is directed via the BM1. If the signal is at "Stop", the BM1 generates an asymmetry in the otherwise symmetrical, digital voltage. This is detected by GOLD and SILVER decoders. The result is a gentle braking of the train until it comes to a halt, optionally with the set braking delay or distance.

If a train approaches from the opposite direction, it simply continues as the detection of the asymmetry is direction-dependent (i. e. the decoder detects, depending on the direction of travel, whether the asymmetry makes the digital voltage more "positive" or "negative").

If the signal changes to "Clear", the BM1 is bridged by the signal switch and the train accelerates at the speed set in the decoder.


List: 16.27
Discount: 80%

Steve's: 3.25
22610 1 in stock

BM2 Braking Module

The BM2 was designed for more demanding model railway operators. It not only allows stopping in front of signals, but also installation of a slow-approach section. To this end, the section in front of a signal is divided into a driving and a braking section.

The length of the driving section must be calculated so as to fully accommodate the longest trains passing this section. The length of the braking section depends on the braking delay and/or distance set in the locomotive decoder (as with the BM1). The driving and braking sections are supplied via the corresponding outputs of the BM2.

For the BM2 to know 'what to do', its control input must be connected in parallel to the red bulb of the signal. In order to also influence rear-powered (pushed) trains, the leading coach must be fitted with a power consumer, for example the interior lighting.

While the train is driving into the driving section, symmetrical voltage will be applied to the entire section. As soon as the train reaches the stopping section, the BM2 feeds asymmetrical voltage into the driving and the braking sections. The locomotive decoder responds by stopping the train with the braking delay set in the decoder. The BM2 also ensures that no braking procedure is initiated when a train approaches from the opposite direction.


List: 67.50
Discount: 80%

Steve's: 13.50
22620 1 in stock

BM3 Block Section Module

The BM3 is a BM2 module equipped with a block-section function that allows life-like block-section operation.

The number of blocks is unlimited as each block requires a separate BM3 module. The BM3 has 2 outputs to connect light signals.

A BMA adapter is required to control double-coil drives (or motors).


List: 80.00
Discount: 80%

Steve's: 16.00
22630 1 in stock

BMA Adapter

This adapter serves to connect signals with double-coil (solenoid) drives or motorised signals to the block-section module BM3.


List: 29.77
Discount: 80%

Steve's: 5.95