The Safety Relay provides an easy way to enhance security of the doors controlled by the H4 Video Intercom (H4VI) by using a relay module to pulse open the electric lock on a command from an ACC

• operator.
• Installed on the secure side of the door, in the event of tamper attempt with the H4VI, the relay will keep the door securely locked.
• After tampering is detected, the clear button on the Safety Relay must be manually pressed to restore normal operation.