Use case for the VTAP100‑PRO‑EXP1 I/O expansion board
An example scenario for using the VTAP100-PRO-EXP1 with the VTAP PRO reader would be door or turnstile control in a supervised access control scenario. In this case the VTAP100-PRO-EXP1 might be used to connect to a door lock. The VTAP100-PRO, on reading a valid pass or card, energises the relay coil on the VTAP100-PRO-EXP1 to open the door.
CAUTION: Apple VAS and Google Smart Tap passes are only suitable for access control use where that access is operating under the supervision of a human at the gate. Apple Wallet Access control would be a more secure option, but is not currently available to all customers.
CAUTION: We recommend you use an access control system specialist to plan and install any access control system. There are many country-specific local regulations, which demand certain behaviour from access control systems, particularly in emergency situations, such as power failure or fire. It is the responsibility of the installer to ensure the applicable regulations are followed by their access control system design.
The following diagram shows where to connect a VTAP100-PRO-EXP1 I/O expansion board for this type of application, with normally open (NO), control (CO) and normally closed (NC) connections from the relay. Typically, power to the door lock monitor would flow through the CO and NC connectors on the VTAP100-PRO-EXP1 I/O expansion board. In this case, choosing NO and CO would produce a fail secure alternative. However, this behaviour depends entirely on your door lock design. Please study the recommendations from the door lock manufacturer carefully.
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