Gorgy Timing LEDI Network IN - Examples of How to Use the Open Collector Output (Pins 3-4)

98
MDE-LEDI-NETWORK-IN-4065V1.0
Here are some examples of how to use this output :
5.2. Examples of how to use the open collector output (pins 3-4)
General case :
You need to add R if the load (LED, loudspeaker,…) does not accept the VDC ►
voltage.
To avoid the transistor destruction, limit the input current to 30 mA (i = Vdc / R < ►
30mA).
TTL input command :
R
External
DC
Power
+
-
WARNING :
VDC max = 45 Volts
3
4
loudspeaker
3
4
R
VDC
TTL input
If VDC = 5 Volts :
Ω== 167
0.03
5
Rmin
so take
Ω≥ 180R
WARNING : The open collector output is not compatible with an
extern power supply with a + pin connected to earth (telecom 48
Volts)..
APPENDIX A – CONNECTIONS