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The optocoupler is guaranteed to be switched on (logical
1
status) when the voltage applied to the input
is within range of 5—24 V (tolerance 10%). It is guaranteed to be switched off (logical 0) when the
applied voltage is under 1.5 V. The input status is undefined between 1.5 and 4.5 V,the input voltage
must not exceed the 24 V limit.
The optocoupler inputs have no protection against wrong polarity. Be sure to connect them always with
correct polarity according to the documented wiring diagrams and connector pinouts.
The nominal input current is 7.5 mA — the input signal must be able to deliver at least this amount of
current.
The optocoupler inputs are TTL compatible provided that the signal source is capable of supplying the
input current of 7.5 mA.
The optocoupler input lines are equipped with a debouncer to prevent generating unwanted input
signals.
The input lines are using fast optocouplers: the propagation time is under 125 ns, for both rising and
falling signal edge (assuming input signal with strongly steep edge). The exact switching speed may vary
with temperature and the used input voltage level — the listed specifications are the worst case values.
Optocoupler input parameters summary
Parameter
Value
Operating voltage
5-24 V
Input current
7.5 mA
External resistor requirement No
ON voltage level
> 4.5 V
OFF voltage level
< 1.5 V
OFF to ON delay
< 125 ns
ON to OFF delay
< 125 ns
OFF to ON jitter
± 5 ns
ON to OFF jitter
± 5 ns
Example of using the optocoupler inputs
