X521 Analog Inputs; Analog Inputs Current/Voltage Switch - Siemens SINAMICS DCM Operating Instructions Manual

7.4.3.4

X521 analog inputs

Table 7- 29 X521 terminal strip
Terminal
1
2
3
4
5
6
7
8
AI: Analog inputs; P10/N10: Auxiliary voltage; M: Ground reference
1)
CAUTION
If more than ±35 mA flows through the analog current input, then the component could be
destroyed.
Permissible input voltage ±30 V (destruction limit).
Permissible common-mode voltage ±10 V, increased faults if exceeded.
Permissible back-EMF at the auxiliary voltage outputs ±15 V.
Note
The power supply for the analog inputs can be taken internally or from an external power
supply unit
7.4.3.5

Analog inputs current/voltage switch

Table 7- 30 Current/voltage selector switch S5
SINAMICS DCM DC Converter
Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
Designation
1)
AI 0+
AI 0-
AI 1+
AI 1-
P10
M
N10
M
Switch
S5.0
S5.1
Technical specifications
The analog inputs can be toggled between current and
voltage input using switches S5.0 and S5.1.
Voltage: -10 to 10 V; R
Resolution: 11 bits + sign
Current: R = 250 Ω
i
Resolution: 10 bits + sign
Auxiliary voltage:
P10 = 10 V
N10 = -10 V
Continuous short-circuit proof
Function
Switchover of voltage (V)/current (I) Al0
Switchover of voltage (V)/current (I) Al1
Additional system components
7.4 Terminal Module TM31
= 100 kΩ
i
209