In the event of an emergency, a PUSH TO EXIT or REX button must be included (per code requirements) when connecting a REX device to a maglock. A push-to-exit button does exactly what its name implies: It allows you to exit when you push it if your door doesn’t open with the REX or traditional handles. It is installed on the inside of a room and is wired to the door's electric lock.
NOTE: For the button to serve its purpose, the door on which it’s installed needs to have an electronic lock. When the button is activated, it sends a signal to the lock and the corresponding lock opens.
Wiring a REX / REX Button
When adding a REX button to a maglock and REX motion device, run a wire from the REX button's NC (Normally Closed) connector to C (Common) on the REX motion device.
Run another wire from the REX button's C (Common) to the Single io door controller's Normally Closed (NC) connector.
A REX button is installed inside a door (usually on the door frame). When pushed, it triggers the lock to release and open the door. REX buttons are generally illuminated (backlit) so that they can be found easily in emergency situations.
A typical REX button has 5 wires (+, -, C, NC, and NO), although only four are needed for normal operation. Two wires (+, -) will power the LED on the button for the backlight, and two wires (C and NC) or (C and NO) will serve as signal wires that connect to the rest of the installation components (the lock and reader).
1. Connect and power the LED on your REX motion device.
- Connect the + and - on the REX using a 12/24V power supply. (If the button does not light, it may be necessary to change the polarity of the LED. Swap the wires on the button’s terminals and plug in the button again to test.)
2. Connect circuit signal wires to Common and Normally Closed.
When wiring a fail-safe lock, a closed (series) circuit must be maintained to continuously power the lock.
- Connect the positive (+) lead of the power supply to C (Common) on the REX.
- Connect the REX's NC (Normally Closed) to C (Common) on the circuit's hardware component (motion sensor, maglock, or reader).
To test this connection, you will need to wire the button to power.
3. Connect and power the REX. This connection provides power to the REX button.
- Connect the REX button negative (V-) terminal to the power supply negative lead.
- Connect the REX button positive (V+) terminal to the power supply positive lead.
When the power supply is plugged in, the button's LED button should turn on.
As long as the rest of the circuit is completed, when the button is pressed, it should open the circuit and release the door lock.
REX DIP Switch Settings
DIP Switches 1, 2, 3 - Latch Time
DIP switches 1, 2, and 3 set the relay latch time. Latch time is the amount of time the relay remains active after the REX detector first sees motion. Latch time is adjustable from 0.5 sec to 64 seconds.
Table 1: Latch Time DIP Switch Settings
|Time (seconds)||Switch 1||Switch 2||Switch 3|
DIP Switch 4 - LED
Table 2: DIP Switch Settings to enable/disable the LED
When LED is enabled, it will flash on and off when first powered up. Once the flashing LED stops, the REX is ready to be used.
DIP Switch 5 - Relay Mode
A fail-secure locking device remains locked when power is lost.
A fail-safe locking device unlocks when power is lost.
Table 3: DIP Switch Settings for Relay Mode
DIP Switch 6 - Resettable / Non-resettable
Resettable: The relay activates when the detector first sees motion. Any additional motion restarts the latch timer so the relay deactivates only when the detector no longer sees motion and the latch time has expired. Hint: This setting works best when bypassing a 24-hour contact.
Non-resettable: The relay activates when the detector first sees motion. It deactivates when the latch time ends, even if motion is still present. Hint: This setting works best when used with an access control system.
Table 4: Resettable / Non-resettable DIP Switch Settings
See also: Wiring a Maglock with a REX Device