Operating Instructions

3 Function diagrams 3.3 Input/output terminals
SINAMICS G120 CU230P-2 Control Units
508 List Manual (LH9), 04/2014, A5E33838102B AA
Fig. 3-8 2251 – Analog inputs 0 ... 1 (AI 0 ... AI 1)
- 2251 -
Function diagram
87654321
fp_2251_97_52.vsd
Input/Output Terminals
G120 CU230P-2
07.04.2014 V4.7
Analog inputs 0 ... 1 (AI 0 ... AI 1)
3
3
T0
<2>
0 … 20 mA
-10 … +10 V
xy
<2> <2>
A
D
<1>
x
1
y
2
x
2
y
1
y
x
[%]
y
x
2
x
1
<2> <3>
1
0
1
0
Voltage
Current
Hardware smoothing
100 µs
Scaling
Differential Input!
For an input signal referred to ground, terminal 4 (11) must be connected to reference potential M.
Caution:
The voltage between an input (Kl. 3 (Kl. 10) or Kl. 4 (Kl. 11)) and the ground point must not exceed 35 V.
When the load resistor is switched in (DIP switch in position I), the voltage between the input terminals
must not exceed 10 V or the impressed current 80 mA.
For p0756 = 2, 3 the units are mA.
For p0756 = 0, 1, 4 the units are V.
Possible settings p0756[0] and p0756[1]:
= 0: 0 V ... +10 V
= 1: +2 V ... +10 V with monitoring
= 2: 0 mA ... +20 mA
= 3: 4 mA ... +20 mA with monitoring
= 4: -10 V ... +10 V (Default for AI 0 and AI 1)
F03505
"Wire
breakage"
r0752
CU AI U/I_inp act
Wire breakage sensing only activated when p0756 = 1, 3.
<5>
Kl. = Terminal
Sampling time of the AI: 4 ms
r0755
CU AI value in % [%]
<2>
<4>
Values in brackets --> AI 1
<2>
Type switching
Analog input
U I
U
AI 0/1
U I
AI 0/1
CU AI status word
r0751
CU AI type
0... 8
p0756[0..3] (4)
CU AI sim_mode
0 ... 1
p0797[0..3] (0)
CU WireBrkThresh
0.00 ... 20.00
p0761[0..3] (2.00)
CU wire brk t_del
0 ... 1000 [ms]
p0762[0..3] (100)
CU AI sim_mode
0 ... 1
p0797[0..3] (0)
CU AI sim setp
-50.000 ... 2000.000
p0798[0..3] (0.000)
CU AI char y1
-1000.00 ... 1000.00 [%]
p0758[0..3] (0.00)
CU AI char y2
-1000.00 ... 1000.00 [%]
p0760[0..3] (100.00)
CU AI char x1
-50.000 ... 160.000
p0757[0..3] (0.000)
CU AI char x2
-50.000 ... 160.000
p0759[0..3] (10.000)
CU AI T_smooth
0.0 ... 1000.0 [ms]
p0753[0..3] (0.0)
100 %
xx
21
•
x
Reference
quantities
p2000 … r2004
Kl. 3
(Kl. 10)
Kl. 4
(Kl. 11)
U
II
–
+
20 mA
20 mA
[0..1]
<1> <3>
<4>
<5>
[%]