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Installation of two SWH-4
2
00 readers side-by-side
and back-to-back
Read range is not affected if the center-to-center distance between two
readers is greater than or equal to four (4) inches (101.6 mm). Two readers
can simultaneously read the same badge or tag if the distance between the
two readers is less than 4 inches, center-to-center. If the distance between
the two readers is less than four inches, field interference between the two
readers may result in a double-badge read.
NOTE
If two readers are being placed back-to-back on a wall less
than 4 inches thick, maximum performance can be achieved
by using a metal separation plate and then using isolation
spacers as necessary.
TABLE 2.
Isolation spacer recommendation
for mounting the SWH-4
2
00 reader on metal.
Distance
Reading Distance
No metal plate
100%
4.5 cm
100%
2.7 cm (3 tamper plates)
85%
1.8 cm (2 tamper plates)
70%
0.9 cm (1 tamper plate)
50%
0 cm
10%
