This compact device is simply the best solution to bring any elevator system into compliance with ASME 17.3 Section 3.10.12 (Door Lock Monitoring). You can save money, time and frustration by using the only out-of-the-box solution. Unlike competing devices, The Argus Elevator Door Lock Monitor does not require specific hardware configuration to match the variability in voltage levels of the different signals that need to be monitored. The configuration is accomplished via a beautiful graphical user interface built into the device. And do not worry, thanks to our innovative and patented design, the device will not break if an input is mistakenly configured and a voltage significantly higher then its setting is applied to it. Each input can safely handle a rated voltage of up 300V AC or DC, regardless of its configuration.