This type of pin is a digital input (DI) including a pulse counting (PI) feature.
This kind of pins have a pull-down resistor to ground
Pulse inputs can be used as a 1 or 2 channel pulse counter and they have a possibility for reset pulse. Possible software channels and pairs are listed in Epec Programming and Libraries manual, section Programming 3606 > I/O > Pulse Inputs.
Electrical characteristics
Symbol |
Parameter |
Conditions |
Min |
Max |
Units |
RI |
Input Resistance |
Input high; Referenced to GND (Note 3) |
11,5 7,5 |
12,5 |
kΩ |
Input Low; Referenced to 1,3 V |
7,5 |
8 |
kΩ |
||
VI-level |
Input voltage level |
Unconnected pin |
typ. 1,3 |
V |
|
VIH |
Input High Voltage |
Overload conditions (Note 1) |
4,1 |
33 |
V |
VIL |
Input Low Voltage |
|
-0,5 |
3,3 |
V |
fI |
Input Frequency (frequency measurement and pulse counting) |
(Note 5, 6) |
|
20 |
kHz |
fI |
Input Frequency |
(Note 2, 4) |
|
1/ 2tC |
kHz |
tI |
Input Pulse Width |
|
1 |
10000 |
ms |
CI |
Input Capacitance |
|
typ. 1 |
nF |
|
Note 1: Exceeding the max value might cause damage to input.
Note 2: tC denotes the software cycle time in milliseconds.
Note 3: The input resistance is typically 12 kΩ, while input voltage is < 15 V. When input voltage increases over 15 V, the input resistance decreases in a non-linear function.
Note 4: The pulse width must be greater that the software cycle time. For example with 50/50 pulse ratio, the pulse frequency is 1 / (2*pulse width)
Note 5: The maximum value can be reached with 50 % duty cycle.
Note 6: The maximum frequency sum for all the pins is 40 kHz.