X521 Analog Inputs - Siemens SINAMICS Equipment Manual

Terminal Modules
5.2 Terminal Module TM31
Note
Ensuring the function of digital inputs
An open input is interpreted as "low".
Terminal M1 must be connected so that the digital inputs (DI) can function.
This is achieved by using one of the following measures:
1. Providing the ground reference of the digital inputs
2. A jumper to terminal M
Note: This removes isolation for these digital inputs.
5.2.2.4

X521 analog inputs

Table 5-12
Type: Screw terminal 1
AI: analog inputs; P10/N10: auxiliary voltage; M or GND: 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 (error limit).
● The back EMF at the auxiliary voltage connections may only be in the range between -15
64
X521: Analog inputs
Terminal
1
2
3
4
5
6
7
8
V and +15 V.
Designation Technical data
1)
AI 0+ The analog inputs can be toggled between current
and voltage input using switches S5.0 and S5.1.
AI 0-
As voltage input:
AI 1+
-10 ... +10 V; R
AI 1-
Resolution: 11 bits + sign
As current input:
-20 ... +20 mA; R
Resolution: 10 bits + sign
P10 Auxiliary voltage:
P10 = 10 V
M
N10 = -10 V
N10
Current-carrying capacity: max. 3 mA
M
Continuously short-circuit proof
> 100 kΩ
i
= 250 Ω
i
Supplementary component descriptions
Manual, 06/2019