AML KDT750 Price Verification System - Manual (Page 35)

KDT750 User’s Guide
4 - 9
Digital Inputs (Opto-Isolators)
The KDT750's internal digital inputs can be used to signal events and actions from an exter-
nal source. Possible uses for the isolated input are:
• External Pushbutton Switches
• Door Sensors
• Proximity Sensors
Digital Input Wiring Diagram
Weigand Interface
The Weigand interface is used to connect proximity card and smart card readers to the
KDT750. Weigand is a simple, two-wire interface used to transmit unidirectional data from a
peripheral device to a host.