Kongsberg EM 712 Maintenance Manual page 181

Two examples are shown to clarify.
•
Using +4.5 V input signal the input current will be as required (~10 mA). No
additional resistance required.
•
An added resistor of 750 Ω and minimum 0.1 W must be used.
Optically isolated output signals
A Processing Unit output circuitry
External power
B
Input to external system
C
The collector current must be approximately 10
mA. A resistor must be used to tune the collector
current depending on your voltage.
Power
5 V
12 V
24 V
451106/B
Resistor value
0.38 kΩ
1.08 kΩ
2.28 kΩ
Cable layout and interconnections
Minimum effect
0.1 W
0.15 W
0.25 W
181