Secure Relay & Timer Circuit – This relay is controlled by any Virdi Terminal and uses a 26bit Wiegand interface. The on board timer circuit can be used to extend or shorten the terminal relay pulse duration. The secure relay is installed on the “safe” side of the door to improve security by eliminating the risk of a Terminals onboard relay being tampered with. They can also be used in conjunction with each other for duress purposes, alarm activation/deactivation and lift control. Up to 5 secure relays can be used on 1 Terminal.