The electronic interlocking ZSB 2000 works according to the operational method of the signalised train control following a decentralised system concept. Depending on the respective project, it defines the operating points to be applied on the line, which are then networked with each other.

On ZSB 2000 lines the following operating points can be used:

• station
• block post
• passing/feeder track (AWANST)
• block interfaces at the beginning and the end of the line

Each of these operating points works independently with a safe system core and controls a project-dependent number of field elements.

The functional extent of the electronic interlocking ZSB 2000 covers the following elements:

• remote-controlled switches, electrically powered
• remote-controlled scotch blocks, electrically powered
• single- and double-slip switches
• spring switches
• locally controlled switches and scotch blocks, electrically powered
• man-operated switches and scotch blocks, key-locked
• train routes
• shunting routes
• flank protection
• overlap
• main signals
• advance signals
• advance signal repeaters
• multi-section signals
• supplementary signals
• train control
• track clearance with axle counters
• block
• auxiliary operating devices

All elements are arranged with regard to the particular project considering the topographical aspects. The maximum configuration could be for example:

• 63 track sections
• 63 axle counters
• 31 main signals
• 31 supplementary signals
• 16 points/scotch blocks