NAUTICAST 300 1001, Руководство по эксплуатации продукта

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B2 Product Manual 2_0
Connection of the Alarm Relay
CABLE 4:
Depending on the Voltage used for the Nauticast B2 you have to calculate the series resistor which
is connected with the LED between the + wire (grey) and the OUTPUT wire (CH1 LED RED, green;
CH2 LED RED, brown; TX TIMEOUT LED, white; ERROR LED, yellow). A series resistor of 330

(calculated 350  ) for 12VDC and 910  or 1k  (calculated 950  ) for 24VDC are needed - see
calculation below.
How to connect a LED to XXX LED OUT
Calculation of the series resistor: Used variables
U... operating voltage of the Nauticast B2
U
F
... Forward Voltage of LED [V]
I
F
... Forward Current of LED[V]
R... Series Resistor[Ω]
P... Power consumption of the resistor[W]
𝑅 =
𝑈−𝑈𝐹
𝐼
𝐹
Examples:
U=12V, U
F
=2V, I
F
=20mA:
𝑅 =
12𝑉 − 2𝑉
0.02𝐴
=
10𝑉
0.02𝐴
= 500𝛺
As there is already a 150
 resistor included for the LED OUT ports, you have to substract this from
the 500  . Therefore 350  is the result.
(!) The ALARM OUT has no resistor included therefore 500  is the result. (see CABLE 3)
U=24V, U
F
=2V, I
F
=20mA:
𝑅 =
24𝑉 − 2𝑉
0.02𝐴
=
22𝑉
0.02𝐴
= 1100𝛺
As there is already a 150
 resistor included for the LED OUT ports, you have to substract this from
the 1100  . Therefore 950  is the result. (!) ALARM OUT has no resistor included, therefore the
result is 1100  (see CABLE 3).
ALARM OUT
+
XXX LED
R
+