Hikvision DS-K2M0016A Distributed elevator controller, 2 RS- 485,2 alarm,16 relay,1buzzer, DC12V

RS-485 communication with the master elevator controller
Connectable with up to 16 relays to control the floor buttons in the elevator. Three types of relays are supported: Button Relay, Call Elevator Relay and Auto Button Relay
DIP switch settings for device address and relay types. Supports 3 relay types: Call Elevator, Button, and Auto Button)
Up to 8 distributed elevator controllers can be linked to the master elevator controller (DS-K2210)
Control the elevator via the relay
Supports master elevator controller linkage, reporting the event to the system.