Use case for the VTAP100‑PRO‑EXP1 I/O expansion board
Access control
An example use of the VTAP100‑PRO‑EXP1 expansion board with the VTAP PRO reader would be door or turnstile control in an access control scenario. In this case the I/O expansion board might be used to connect to a door lock:
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The VTAP PRO reader, on reading a valid mobile pass or card, energises the relay coil via the VTAP100‑PRO‑EXP1 expansion board to open the door.
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Meanwhile the input on the expansion board can monitor the status of a ‘request to exit’ button, which is connected to a bell or an indicator at reception, so that on pressing the button, an attendant is alerted to unlock the door.
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The serial LED output can be used to drive sequences or animations on an LED matrix (such as an arrow, tick or cross) to provide user feedback.
VTAP PRO I/O expansion interfaces for access use case
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 I/O expansion board for this type of application, with normally open (NO), common (COM) and normally closed (NC) connections from the relay.
Typically, power to the door lock monitor would flow through the COM and NC connectors on the VTAP100 PRO I/O expansion board. In this case, choosing NO and COM 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.
Arcade gaming
Most arcade gaming machines use a coin‑based credit loading system. Each time the correct coin is inserted in the slot, the coin sensor sends a pulse to the main controller/CPU which in turn adds a credit. A VTAP PRO reader with a PRO I/O expansion board can replace the coin based mechanism, with an NFC Wallet pass or NFC card based system for credit loading. This can send pulses to the main controller/CPU, in the same way as the coin mechanism, upon reading a suitable mobile pass/card.
If the mobile pass contained multiple credits, the return payload from VTAP Cloud to the VTAP PRO reader could signal this by including a corresponding number of pulses for the relay output.
A serial LED strip or matrix can be connected to the VTAP100‑PRO‑EXP1 to enhance the user experience with default, valid/invalid pass read animations or sequences. These settings can be configured on the VTAP PRO reader either over VTAP Cloud, if the reader is in Cloud mode, or if it is in Local mode by updating a configuration file. Configuration can be updated using ZModem (over serial comms) or by direct text editing (USB mass storage drive).
VTAP PRO I/O expansion interfaces for arcade gaming use case
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