6 horstCONTROL I/O
42
6.4.7
Common Features of All Digital Interfaces
6.4.7.1
Electrical Parameters
The specifications described in this section apply to all digital interfaces (safety-critical and general). The
functional wiring diagrams for the interfaces can be found in the Annex (
the Electrical Interfaces, page 78).
Parameter
min. typ.
max. Unit
Description
Inputs
Voltage
-3
24
36
V
Input voltage
Switching threshold
HIGH
–
LO
6.0
7.5
V
Logical high
–
low
Switching threshold
LO
–
HIGH
8.5
10
V
Logical low
–
high
Current consumption
2.4
2.6
mA
Input voltage 18
–
30 V
Input resistance
3
k
Ω
ESD strength
+/- 15
kV
Human Body Model
IEC 61131-2
Type 1 & 3
Outputs
Function
Type PNP (High-Side) or Push-Pull, semi-con-
ductor
Voltage
23.5 24
24.5
V
Output voltage
Current
HI_PP
0
0.64
1.2
A
Per output, logically high, Push-Pull
Current
LOW_PP
0
0.44
0.81
A
Per output, logically low, Push-Pull
Current
HI_HS
0
0.64
1.2
A
Per output, logically high, High-Side
Internal
resistance
HIGH
110
230
m
Ω
Internal resistance
LO
1
2.5
Ω
Leakage current
100
180
µ
A
ESD strength
+/- 8
kV
Contact
Table 6-9: Characteristic values of digital I/O horstIO
Summary of Contents for HORST900
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