X521 Analog Inputs - Siemens SINAMICS Series Operating Instructions Manual

7.5.3.5

X521 analog inputs

Table 7- 36
Connector
AI: Analog inputs; P10/N10: Auxiliary voltage; M: Ground reference
1)
NOTICE
Damage or malfunctions through impermissible voltage values
If a current exceeding ±35 mA flows through the analog current input, then the component
could be destroyed.
The common mode range must not be violated in order to avoid incorrect analog-digital
conversion results.
• The input voltage may only be in the range between -30 V and +30 V (destruction limit).
• The common mode voltage may only be in the range between -10 V and +10 V
• The back EMF at the auxiliary voltage connections may only be in the range between
Note
The power supply for the analog inputs can be taken internally or from an external power
supply unit
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
X521 terminal strip
Terminal
1
2
3
4
5
6
7
8
(error limit).
-15 V and +15 V.
Designation
1)
AI 0+
AI 0-
AI 1+
AI 1-
P10
M
N10
M
Additional system components
7.5 Terminal Module TM31
Technical specifications
The analog inputs can be toggled between
current and voltage input using switches
S5.0 and S5.1
As voltage input:
-10 V to +10 V; R = 100 kΩ
i
Resolution: 11 bits + sign
As current input:
R = 250 Ω
i
Resolution: 10 bits + sign
Auxiliary voltage:
P10 = 10 V
N10 = -10 V
Current-carrying capacity: max. 3 mA
Sustained short-circuit-proof
243