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9.) The completed debit transaction is communicated back to the vending machine controller.
10.) The vending machine controller vends the item to the customer.
11.) If the item fails to vend, the vending machine controller sends a refund to the Wicket Reader.
12.) The Wicket Reader blinks white to indicate a pending refund transaction for the amount.
13.) The customer reads his Wicket again, the amount is refunded, and the Wicket Reader blinks green.
14.) If the same Wicket is not presented to take the refund within 30 seconds, the Wicket Reader goes
back to the idle blue color and saves the refund information for some future time when the Wicket is
again presented and completes the transaction then.
Note: The MDB Specification does not guarantee that you can just plug the WK-MDB Module and a
WR88 Wicket Reader into just any vending machine and expect it to work. The vending machine
controller may not be capable of communicating with a second cashless payment device, or it may have
an incompatible implementation of the communication sequence details. Please contact IDX sales for
compatibility information.
Serial Port - Card-Display Protocol: WK-CD Module
The Card-Display Protocol was developed by IDX at
the request of various card acceptor manufacturers
to provide interoperability of credit and debit card
systems with the installed display-timers in self-service
carwash bays. Payment, display message, and status
information are communicated between the units via
RS-232.
The WK-CD Module is designed to provide the
electrical and protocol interface between a WR88
Wicket Reader and an Card-Display compatible
display-timer, such as the IDX BigTime, Little Two
Timer, or GigaTime. Its three diagnostic LED
indicators provide visual operational information that may be helpful during installation and for
troubleshooting problems. The enclosure dimensions are 3.3" L x 2.2" W x 1.0" H (84mm x 56mm x
20mm) and comes with adhesive Velcro mounting strips.
There is an RJ-11 telephone style connector on the right side of the enclosure to plug in the WR88 Wicket
Reader. There is also an attached 16" RJ-11 telephone style cable assembly on the left hand side of the
enclosure to plug directly into the Card-Display Protocol compatible display-timer.
Note: Wickets Administrator must be used to program the WR88 Wicket Reader to enable the Card-
Display Protocol so it will properly communicate through the WK-CD Module to the display timer. See
below for information about setting the configuration parameters for the WR88.
IDX Inc. 400 W. Cedar St. El Dorado AR 71730
800-643-1109 www.idxinc.com
sales@idxinc.com
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