A Chexit device can use up to 10 wires and is why the EPT-10 was designed with the same 10 colored wires as a Chexit device.
Having 10 wires available from the door to the frame is recommended to utilize all of the features of the Chexit device, but not all installations require the use of all of those features.
A review of the wiring diagrams in the Von Duprin Chexit (New Design) Wiring & Installation Instructions - For device purchased on or after 8-24-2015 (allegion.com)would identify how many wires are necessary for your specific installation.
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