SecuraKey
Upgraded Control Panel
SecuraKey has improved upon their already existing SK-NET systems by introducing the NOVA.16 multi-reader access control panel. The panels connect to a local network as well as a peripheral network which can support up to 16 Smart Readers which each control a door or gate. All door connections are made at the Smart Reader-no cable home runs from door to door. Each smart reader has a solid-state Strike Relay, two Open Collector outputs, four inputs and it only requires a twisted pair for RS485 data and a pair for DC power.
http://www.securakey.com/PRODUCTS/Access_Control_Panels_Software/16_DOOR_Access_Control_Panels_and_Software.htm