Siemens 6RA8085-6DS22

Descriptions of functions
10.1 Inputs/outputs
SINAMICS DCM DC Converter
404 Operating Instructions, 12/2018, A5E34763375A
10.1.3
Analog inputs
Properties
Table 10- 2 Properties of the analog inputs
Inputs
Properties
AI 0, AI 1
•
Differential inputs
• Voltage inputs -10 to +10 V or
Current inputs -20 to +20 mA or 4 to 20 mA
• Hardware input filter: T = 1 ms
• Integrating measuring procedure. Averaging time = 1 ms. The average value determined during
this time is provided in BICO format.
AI 2
• Differential input
• Voltage input -10 to +10 V
• Hardware input filter: T = 1 ms
• Integrating measuring procedure. Averaging time = 1 ms. The average value determined during
this time is provided in BICO format.
An external armature current actual value can also be connected to this input (see FP6902).
The 3 inputs AI 0, AI 1 and AI 2 of a CUD on the left and the 3 inputs AI 0, AI 1 and AI 2 of a CUD on the right can be
operated so that they are averaged during the same measuring interval. The 6 mean values are provided on 6 BICOs
(see FP2083).
AI 3, AI 4, AI 5,
AI 6
•
Differential inputs
• Voltage inputs -10 to +10 V
• Hardware input filter: T = 100 µs
• Sampling measuring procedure. Sampling time = 250 µs. The mean value taken from 4 sampling
values is provided in BICO format.
An external actual armature current value can also be connected to these inputs (see FP6850).
Tachometer input
XT1.103/104
• Input referred to ground
• High-voltage input -270 V .. +270 V
• Hardware input filter: T = 1 ms
• Integrating measuring procedure. Averaging time = 1 ms. The average value determined during
this time is provided in BICO format.
This input is designed for connecting an analog tachometer, but can also be used in other ways.
Function diagrams
2075
Analog inputs, AI 0 and XT1.103/104
2080
Analog inputs, AI 1 and AI 2
2085
Analog inputs, AI 3 and AI 4
2090
Analog inputs, AI 5 and AI 6