Event Inputs
Inputs
32 event channels (Anode (A), Cathode (C) optocoupler with 562 Ω series resistor )
Isolation voltage
230 V AC RMS or DC (channel to channel and channel to chassis/earth)
Isolation device
Fairchild FOD8071 optocoupler (or comparable)
Switching frequency
10 MHz input block signal tested. The highest frequency supported for the system is limited
by the isolator box or acquisition system, whichever is the lowest
Maximum propagation delay
55 ns
Common mode transient voltage
Typically 20 kV/μs
Input switching voltages (see Figure B.64 and Figure B.65)
Logic 0
< 1.0 V + 0.0015 A (562 Ω + R
ext
)
Logic 1
> 1.3 V + 0.0050 A (562 Ω + R
ext
)
Maximum nondestructive voltage
1.8 V + 0.0150 A (562 Ω + R
ext
)
Minimum nondestructive reverse voltage
-
5.0 V
0Ω
50Ω
+5V
562Ω
Isolated Input
FODM8071
If
U
external
Rext
Data
A
C
+
-
Figure B.64:
Add an external resistor to change input voltage levels
Logic 0
Logic 1
Maximum
Minimum
0
-5
-10
5
10
15
20
25
30
0
1
2
3
4
5
0
-10
10
20
30
40
50
60
70
80
90
100
110
4
6
8
10
12
14
16
18
20
U
external
[V]
U
external
[V]
U
external
[V]
R
ext
[kΩ]
R
ext
[kΩ]
R
ext
[kΩ]
50
0
-50
100
150
200
250
300
350
0
2
4
6
8
10
12
14
16
18
20
Figure B.65:
Detailed input voltage levels (top graphs)/nondestructive input voltages (below)
GEN3t
I3995-3.1 en HBM: public
819