Rockwell Automation 2755 AdaptaScan Bar Code Readers - Manual (Page 34)

Installation Considerations 2–8
The following tables show tabular read range limits for the three
versions of the AdaptaScan Readers.
Table 2.A
Read Ranges, Catalog No. 2755-SN3➀
Minimum Apparent Element Width➁ Read Range ➂
Mils mm Inches Meters
5
6
7.5
10
13
15
20
25
30
35
40
45
50
55
.13
.15
.19
.25
.33
.38
.51
.64
.75
.89
1.02
1.14
1.27
1.40
1.9 - 3.6
1.9 - 5.3
1.4 - 7.2
1.4 - 10.9
1.4 - 16.2
1.4 - 19.5
1.4 - 28.4
1.4 - 36.8
1.9 - 42.9
1.9 - 51.4
1.9 - 59.3
2.4 - 64.4
2.9 - 69.4
3.4 - 74.6
.048 - .092
.048 - .135
.036 - .183
.036 - .277
.036 - .411
.036 - .495
.036 - .721
.036 - .935
.048 - 1.09
.048 - 1.31
.048 - 1.51
.061 - 1.64
.074 - 1.76
.086 - 1.89
Table 2.B
Read Ranges Catalog No. 2755-SN5➀
Minimum Apparent Element Width➁ Read Range ➂
Mils mm Inches Meters
5
6
7.5
10
13
15
20
25
30
35
40
45
50
55
.13
.15
.19
.25
.33
.38
.51
.64
.75
.89
1.02
1.14
1.27
1.40
1.9 - 4.7
1.9 - 7.3
1.9 - 8.9
1.4 - 14.0
1.4 - 19.5
1.9 - 21.8
1.9 - 29.7
2.4 - 36.2
2.4 - 42.5
2.4 - 51.5
3.4 - 56.9
3.9 - 61.9
4.4 - 67.9
5.4 - 71.6
.048 - .119
.048 - .185
.048 - .226
.036 - .356
.036 - .495
.048 - .554
.048 - .754
.061 - .919
.061 - 1.08
.061 - 1.31
.086 - 1.44
.099 - 1.57
.112 - 1.72
.137 - 1.82
Table 2.C
Read Ranges Catalog No. 2755-SN8➀
Minimum Apparent Element Width ➁
Mils mm
Read Range ➂
Inches Meters
5
6
7.5
10
13
15
20
25
30
35
40
45
50
55
.13
.15
.19
.25
.33
.38
.51
.64
.75
.89
1.02
1.14
1.27
1.40
1.4 - 5.7
1.4 - 8.2
1.4 - 10.7
1.4 - 16.0
1.4 - 21.0
1.9 - 25.4
2.4 - 34.3
3.4 - 42.2
5.4 - 50.2
6.4 - 55.6
7.4 - 62.1
8.4 - 65.4
10.4 - 69.0
11.4 - 72.5
.036 - .145
.036 - .208
.036 - .272
.036 - .406
.036 - .533
.048 - .645
.061 - .871
.086 - .107
.137 - 1.27
.163 - 1.41
.188 - 1.58
.213 - 1.66
.264 - 1.75
.290 - 1.84
Read Ranges
Read ranges based on four character Code
39 labels with a wide to narrow bar ratio of
2.6 to 1 and a print contrast ratio of .75 or
better. Read ranges will vary with bar code
symbol quality.
When scanning labels at an angle apparent
element width is less than the actual element
width.
Read ranges measured from front edge of
wiring base. Add .58 inches (.015 meter) for
the distance to the scan window.
➀
➁
➂
Read Range
Measured From This Point