2N® Sentrio Switch – External Buttons (913789041) Technical Specifications Brand: 2N® Sentrio Series Part Number: 913789041 Function: Switch module for connecting up to 4 external buttons to facilitate emergency communication and control functions Installation: Interconnected with the 2N Sentrio Cabin main unit via a 20 cm eight-wire cable; mounts in the elevator cabin or control panel Compatibility: Designed for use with the 2N Sentrio Frame external button version; supports YES, NO, and ALARM1 buttons Control: Inputs 5–8 support contact or voltage control for external buttons, with factory-mounted configuration jumpers; ALARM1 input initiates emergency communication after a predefined press duration Integration: Includes connectors for external electret microphone and speaker (16 Ω / 0.25 W); supports CANCEL function to delay ALARM1 activation, cancellable if elevator door opens; connector 4 provides 12 V / 80 mA DC for button backlighting