©2006 Cypress Computer Systems,Inc. • www.cypressworld.com
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C. The “
2 Wire 5 Volt
” method. This method also uses two supplies. One to power the Central and
the other to power the Remote unit. It also requires 2 wires to connect the units together. This
method is used when the only power available is an existing 5 volt supply. It is not recommended to
use one 5 volt supply to power both units.
The power supplies are located at both the Central and Remote unit. The 5 volt power must be
connected to the reader interface + 5 Volt and Ground connections. The other unit can be supplied
by either a 5 volt or 8 to 24 volt supply.
Note: When using the 5 Volt power connection, make sure that only one power supply is connected to
each unit.
The +8 to 24 and 5 Volt supplies should NEVER be connected or used at the same time
.
Illustration shows both units with 5 volt power supply.
Gnd
+V
Line -
Line +
R
C
Power Supply
5 VDC
+V
Gnd
Power Supply
5 VDC
+V
Gnd
Supplying Power:
