18
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 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 20 VDC.
