Method for monitoring a brake system in an elevator system and corresponding brake monitor for an elevator system

The present invention relates to a brake monitor (100) for monitoring a brake system (13) of an elevator system (10) that comprises a drive (11) and a drive controller (12) in addition to the brake system (13). The brake monitor (100) comprises a first brake signal input (KB) for electrically connecting the brake monitor (100) to a first brake contact of the brake system (13). The brake monitor further comprises a driving signal input (AF) for connecting the brake monitor (100) to a first electrical driving signal line (12.1) of the drive controller (12). Also provided are a power supply (101), a microprocessor (102) and a relay circuit (103). The relay circuit (103) is configured such that it can be activated for interrupting a safety circuit (20) of the elevator system (10) or for interrupting a control voltage of the drive controller (12) so that the elevator system (10) can be stopped.