Electrical Characteristics
There are three different power/ground systems on Opto Trigger 5. One supplies the signals of the port A connector, another one the signals of the port B connector, and the third one the signals of the flat cable connector. There is no electrical connection between these three power/ground systems.
Each of the three power/ground systems may have a different supply voltage. The voltage range lies between 5 and 25.0 Volt. The signal voltage is defined by the supply voltage for both, input and outputs. See below for details on the electrical characteristics.
The following data apply to the physical input and output ports of both ports, port A and port B.
Inputs
|
Min |
Typical |
Max |
Unit |
---|---|---|---|---|
Supply Voltage |
4.5 V |
|
28 V |
V |
Input threshold |
|
20% Supply Voltage |
|
V |
Differential Input |
|
10 mV |
|
mV |
Input Current |
|
|
4 |
mA (per channel) |
|
IN Signals on Opto Trigger 5 |
|
The input signals are not directly passed to the opto couplers but send to differential comparators. The advantage is that the input accepts low current, voltage driven signals between 5 and 25 V. (Input signals can have pull up or a pull down resistor of 10k Ohm). The polarity of the input signals is NOT inverted. |
|
Surge Protection |
|
OPTO Trigger 5 has been designed with a varistor which opens at an input voltage of 30V to let the onboard surge protector get active to protect the board. At a total supply voltage of 36V, the electronic chips will become defective. |
Outputs
|
Min |
Typical |
Max |
Unit |
---|---|---|---|---|
Supply Voltage (max. supply current per port) |
4.5 |
|
28 |
V |
Output Signal Voltage High |
|
-0,3 V Supply Voltage |
|
V |
Output Signal Voltage Low |
|
|
0.3 |
V |
Output Current |
|
20 |
|
mA (per channel) |
The supply current required for each port of Opto Trigger 5 depends on the number of used inputs and outputs, the signal and the voltage level. Typical supply current required per port: < 200 mA/port
OUT Signals on Opto Trigger 5 |
|
|
On Opto Trigger 5, the opto-couplers do not directly connect to the output, but are buffered by MOSFET transistors. These transistors build an easy-to-use open collector driver with a 20 mA static current diode as pull-up. Note that the power must be delivered by the external power source. |
Surge Protection |
|
|
Opto trigger 5 has been designed with a varistor which opens at an input voltage of 30V to let the onboard surge protector get active to protect the board. At a total supply voltage of 36V, the electronic chips will become defective. |