Issue link: https://www.e-digitaleditions.com/i/1132978
32 I ICT TODAY LOCK POWER OUTPUT ELECTRIC LOCK BALANCED TWISTED PAIR CABLE IP CREDENTIAL READER BALANCED TWISTED PAIR CABLE NETWORK SWITCH WITH PoE+ BALANCED TWISTED PAIR CABLE FIRE ALARM CONTROL PANEL LOCAL TELECOMMUNICATIONS ROOM NETWORKED POWER CONTROLLER NETWORKED FIRE ALARM INTERFACE ELECTRIC LOCK TO ACCESS CONTROL EQUIPMENT FIRE ALARM CONTROL PANEL LOCAL TELECOMMUNICATIONS ROOM CENTRAL POWER SUPPLY 120V POWER FIRE ALARM CONTROL OUTPUT RELAY POWER TO ELECTRIC LOCKS NC FIGURE 2: Example showing automatically unlocking IP door controller from the PoE+ switch with adapters that should be added to the construction documents. FIGURE 3: Example showing automatic unlocking from the centralized power supply with supervised fire protection relay. This diagram should also be added to the construction documents. Intercom Owners frequently grant access to visitors who do not have credentials by using an intercom. Some manufac- turers produce an integrated device with a credential reader, intercom and camera in one tamperproof housing. Staff with an app on a handheld device can release the door lock after viewing video of the door and/or speaking to the visitor. The intercom system should be tested so it does not trigger an unauthorized entry alarm on the access control system. Fire Alarm Many projects are required by code to unlatch doors upon activation of the fire detection and alarm system (Figure 2) or the sprinkler system: • Document locations where relays from fire detection and alarm panel are required (Figure 3). • Determine if the power supply will drop power to the failsafe lock and specify how the power supply communicates with the sprinkler or fire detection system. If the power supply communicates over the LAN, show redundant pathways where required. • Document if NFPA 3 and/or NFPA 4 standards will be used on the project. • Show locations of magnetic lock release switches that may be required at fire detection and alarm panel. Delayed Egress To meet codes allowing emergency egress, some doors the owner wants locked at all times may be allowed to open in an emergency without authorization of a credential. The time delay before opening is typically 15 or 30 seconds and should be indicated in the construction documents. Unplanned delayed egress opening may trigger a forced entry alarm on the access control system. An integrated local or remote alarm sounder is often required for staff notification, and a description of how the sounder operates should be included in the construc- tion documents. The sounder may need to audibly count- down before unlocking and then provide a constant, steady alarm upon lock release so staff can react. Specify where the alarm needs to be heard by staff during testing, and include its location on the floor plans. Indicate how the alarm is disabled (i.e., credential read or key switch). It should be clear in the construction documents how the delayed egress cycle is initiated. Positive latching may be required so the delayed egress cycle is not initiated from the unsecure side of the door.