Professional Inputs
Equivalent schematic
Professional inputs characteristics
Parameter |
Symbol or conditions |
Value |
Unit |
||
Min. |
Typ. |
Max. |
|||
Open threshold |
Rth |
2 |
4 |
9 |
kΩ |
Measurement current |
Imeas |
— |
±130 |
— |
μA |
Voltage threshold (TTL input) |
Vth-TTL |
1 |
1.5 |
2 |
V |
Voltage threshold (+12 V input) |
Vth-12V |
5 |
6 |
7 |
V |
Maximum differential input voltage (not operating) |
Vdiff-max |
— |
— |
±27 |
V |
Maximum input voltage (not operating) |
Vcom-12V |
-27 |
— |
+27 |
V |
Input voltage range to correctly interpret OPEN/CLOSE states on contacts |
— |
-3 |
— |
+6 |
V |
Input voltage range to correctly interpret HIGH/LOW states on 5V signals |
— |
-11 |
— |
+14 |
V |
Input voltage range to correctly interpret HIGH/LOW states on 12V signals |
— |
-11 |
— |
+14 |
V |
Input voltage range to correctly interpret HIGH/LOW states on 24V signals |
— |
-24 |
— |
+26 |
V |
Common-mode noise immunity from DC to 20 MHz (filter set to 100 ms) |
— |
8 |
— |
— |
V |
Input state sampling period |
— |
— |
4 |
— |
ms |