8.9.2
Analog Outputs
The I/O and Relay Option has 1 analog output that can be configured with the software to voltage output or current output. The table
shows the specification for the analog output.
The analog output is protected in overvoltage conditions.
Table 32: Analog Output Types and Values
Parameter
Value
Output Voltage Range
0...10 V
Output Current Range
0...20 mA
Accuracy
0.5% of full scale
Reaction time
0...90% step: <1 ms
Electrical fast transient (EFT)
2 kV
18000
16000
14000
12000
10000
8000
6000
4000
2000
0
0
2
4
6
8
10
C
[mA]
A
[Ohm]
12
14
16
18
20
e3
0b
i0
29
.1
0
B
Figure 46: Allowed Load Resistance of Analog Output in Current Mode
A
Load resistance
B
Allowed load resistance
C
Output current
8.9.3
Digital Inputs
The I/O and Relay Option has 6 digital inputs. By default, the digital inputs are not isolated, because there is an external wire between the
connector pins 19 (D
GND
) and 23 (GND). The digital inputs can be functionally isolated from the PCB ground of the I/O and Relay Option
by removing the wire. The digital inputs are polarity free.
Digital inputs are overvoltage protected.
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