Datalogic Heron D140, Quick Reference

Video Polarity 

Normal

: 

bar

space

white

black

barcode output

 
Video Polarity 

Inverted

: 

bar

space

white

black

barcode output

Scan Rate 

18 scan/sec 

i%*Ak

i%*Ak

i%*Ak

36 scan/sec 

‹

72 scan/sec 

i%*Dk

i%*Dk

i%*Dk

i%*Gk

i%*Gk

i%*Gk

144 scan/sec 

i%*Jk

i%*Jk

i%*Jk

Beeper Intensity 

Beeper Off 

i#(;k

i#(;k

i#(;k

Low Intensity 

Medium Intensity 

i#(>k

i#(>k

i#(>k

i#(Ak

i#(Ak

i#(Ak

High Intensity 

‹

i#(Dk

i#(Dk

i#(Dk

BEEPER/LED

   This scanner input drives the decoding LED, 

the Good Read Spot and the beeper in the 
scanner. The LED and Good Read Spot turn 
on when a positive current is applied to the 
pin. The beeper sound is obtained pulsating 
this current at a frequency of about 2 kHz. 
The maximum voltage that can be applied to 
this input is 5 Vdc. 

VIDEO

This “open collector” scanner output is 
electrically identical to the barcode. It 
supplies a series of pulses the length of 
which are proportional to the width of the 
elements within the barcode read. Video 
polarity is programmable. By default a low 
output level corresponds to a bar. The 
frequency of the pulses depends on the 
density of the code, the distance from code 
and the programmed output scan frequency 
(see the following figure Video and Scan 
signals). 

ILLUMINATOR

   A positive voltage (5 Vdc) is applied to this 

input by the decoder when the decoding logic 
senses the trigger is pressed; this causes the 
activation of the illuminator and CCD. 

+VCC

This input must be connected to the positive 
pin of the supply voltage (5 Vdc ± 5%). When 
the ILLUMINATOR pin is positive, all the 
current necessary to power the scanner flows 
tVCC. 

Video and scan signals 

CODE

VIDEO

SCAN