Metrologic IS421X ScanGlove Guia do Utilizador descarregar pdf (Página 21)

24 Scan Sense Each positive transition of the scan sense signal

represents the start of a scan cycle, which is one

pass in each direction across the bar code.

Therefore, it sends the bar code data (both

forwards and reverse) between the rising edges.

There are 35 scan sense pulses per second,

which equals 70 scans per second.

Note: The polarity does not show scan

direction.

This is an open collector output that can sink 25

mA via an external pull up resistor connected to

a voltage not to exceed +20 VDC.

25 Data Data is an output digital representation of the

scanned bar code. A low level represents a bar

and a high level represents a space.

This is an open collector output that can sink 25

mA via an external pull up resistor connected to

a voltage not to exceed +20 VDC.

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Metrologic IS421X ScanGlove Guia do Utilizador Página 21