7
INSTALLATION CONSIDERATIONS
An isolation spacer available from Software House may be used to
improve the read range when mounting the reader to a metal surface.
Part number: SWH-SPACER-BLK or SWH-SPACER-LGR
To optimize reader range use the number of blackplates as indicated in
Table 2. Use of Isolation Spaceers is optional and not required for non-
metal mounting surfaces
Installation of two SWH-4x00 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.
TABLE 2. Isolation spacer recommendation
for mounting the SWH-4x00 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%
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