Wiegand or Multi-Discipline Reader Distance
CAUTION: When implementing the 150 m (164 yd) cable distances with Impro
Wiegand Readers use the 12 V power output option. Note, however,
that the Multi-discipline Readers only connect using the 12 V power
output option.
For maximum, data communications distance, install the Readers no further than
150 m (164 yd) from the Terminal The cable individual conductor cross-sectional area
should not be less than 0.2 mm
2
(0.0003 in
2
).
Distance between the WRM and its Multi-mode Remote
The maximum cable distance between the Impro WRM and its Multi-mode Remote
MUST NOT exceed 10 m (33 ft). Achieve this by using good quality screened, twisted
pair cable.
Distance between Reader Units
To avoid mutual interference, install the Readers at least 500 mm (20 in) apart. (The
same rule applies between readers on opposite sides of the same wall.)
EARTH Connection
Connect the Impro WRM (“ETH” Terminal) to a good EARTH point. Mains EARTH can
be used, but electrical noise may exist.
Arc Suppression
Snubber devices are recommended for EMF Flyback and Arc Suppression when
driving an inductive load with the Relay, see Figure 2.
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