Datalogic Magellan 8500 Product Reference Manual page 173

Great care should be taken to select the correct interface type, since you can
cause damage to the scanner and/or POS terminal by attempting to change to
an incompatible interface. ALWAYS make interface selections with the host
cable DISCONNECTED.
CAUTION
Single cable installations require connection at the POS Terminal (host) port.
The Scale Host port connection is not used for this interface.
NOTE
Product Reference Guide
RS-232 Single Cable Interface Selection
Remember to cover any unused barcodes on this and the facing page to
ensure that the scanner reads only the barcode you intend to scan.
INTERFACE TYPE = RS-232 SINGLE CABLE
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