Controlled Electronic Management Systems Ltd ETHERPROX Manual De Usuario
Configuring EtherProx Entry
EtherProx Entry
Power Connections
The EtherProx Entry reader contains an internal voltage regulator that requires an
external power supply with nominal 12-volt output. The internal voltage regulator is
capable of supplying at least 250 mA of current. The Power input is filtered, as well
as Transzorb and reverse-voltage protected. Power is supplied to the reader by
means of a J3 connector, as shown in Figure 1.
external power supply with nominal 12-volt output. The internal voltage regulator is
capable of supplying at least 250 mA of current. The Power input is filtered, as well
as Transzorb and reverse-voltage protected. Power is supplied to the reader by
means of a J3 connector, as shown in Figure 1.
Figure 1: Terminal and Power Connections
Note
The Phoenix Contact terminals for the power and data connections can
accommodate two leads fitted into one terminal.
accommodate two leads fitted into one terminal.
The total cable length between the power supply and the reader depends on the
type of cable you use and whether you connect an exit reader. Here are guidelines
for determining the voltage:
type of cable you use and whether you connect an exit reader. Here are guidelines
for determining the voltage:
1.
For long cable runs, use Table 1 to calculate the voltage drop of the cable
between the power supply and the reader.
EXIT
READER
WIRE SIZE
VOLTAGE
DROP
/100
FT
VOLTAGE
DROP
/100
M
Y 18
AWG 0.64V 1.95V
Y 22
AWG 1.6V 4.9V
N 18
AWG .38V
1.17V
N 22
AWG 0.96V 2.9V
Table 1: Voltage Table
2.
Subtract the result from the power supply’s output voltage.
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