When integrating a Request to Exit (REX) device with a magnetic lock, it’s important to understand both the electrical requirements of the maglock and how the button’s contact terminals work. Magnetic locks require constant 12V DC power to remain locked and unlock by removing power, making the wiring logic of your REX device critical.
Both the RVN-REX and RVN-REX-T come with three terminals: COM (Common), NC (Normally Closed), and NO (Normally Open). For direct-to-lock wiring, you’ll typically use COM and NC to interrupt the 12V+ line going to the maglock. When the button is pressed, the NC contact opens, cutting power to the lock and unlocking the door. The RVN-REX-T version adds a timer delay circuit that extends this unlock period from 1 to 60 seconds, offering more flexibility for ADA access or slow-moving doors.
[Insert Image: Diagram showing RVN-REX-T directly wired to interrupt power to a maglock]
For access control panel integration, most modern systems provide a request-to-exit input (REX IN) and a door lock relay output. In this case, the REX button (RVN-REX or RVN-REX-T) connects to the REX input on the panel using the COM and NO terminals. Pressing the button signals the panel to momentarily deactivate the lock relay, which cuts power to the maglock through its designated relay output.
[Insert Image: Diagram showing RVN-REX connected to access control panel’s REX input, with relay output controlling the maglock]
This method is preferred in systems where the access control panel manages door timers, logging, and security events. However, using the RVN-REX-T with an onboard timer still offers local fallback or override capability without relying on the panel’s logic.