The keypad may be connected directly to the Challenger RS-485 LAN, up to 1.5 km from the Challenger panel or Intelligent Access Controller. It has an input for request to exit (RTE) control and an open collector output that can be used to control a door relay or door strike. The keypad's performance and robust construction make it suitable for a wide range of applications, including dusty or wet environments (rated to IP67). It may be used as a Challenger system remote arming station.