| 摘要 |
A monitoring system for people-transporting systems, which systems are in the form of an elevator, escalator or moving walkway, includes at least one interrogation device and at least one safety switch that is connected to the interrogation device via an electrical safety circuit and is used for monitoring an equipment of the people-transporting device. A current direction-dependent unit is arranged in the electrical safety circuit. Furthermore, the interrogation device applies a test voltage with an alternating polarity to the electrical safety circuit. Furthermore, a people-transporting system having such a monitoring system is provided. |
