Siemens S120 - X121 Digital Inputs;Outputs

Control Units, Control Unit Adapters and operating components
7.3 Control Unit CU310-2 PN (PROFINET)
AC Drive
Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
271
7.3.2.6
X121 digital inputs/outputs
Table 7- 7 X121 digital inputs and bidirectional digital inputs/outputs
Terminal
Designation
1)
Technical data
1
DI 0
Voltage: -3 … 30 VDC
Current consumption, typical: 6 mA at 24 V
Electrical isolation: via optocoupler
Level (incl. ripple)
High level: 15 … 30 V
Low signal level: -3 … 5 V (at ≤ 2 mA)
Input delay (typ.):
For "0" → "1": 50 μs
For "1" → "0": 150 μs
protected against polarity reversal
2
DI 1
3
DI 2
4 DI 3
5
M2
Reference potential for digital inputs DI 0 to DI 3
6
GND
Ground reference for the electronics
7
DI/DO 8
As input:
Voltage: -3 … 30 VDC
Current consumption, typical: 5 mA at 24 V
Level (incl. ripple)
High level: 15 … 30 V
Low signal level: -3 … 5 V (at ≤ 2 mA)
DI/DO 8, 9, 10, and 11 are rapid inputs
2)
Input delay (typ.):
For "0" → "1": 5 μs
For "1" → "0": 50 μs
As output:
Voltage: 24 VDC
Max. load current per output: 500 mA
Output delay (typ. / max.)
3)
:
For "0" → "1": 150 µs / 400 μs
For "1" → "0": 75 µs / 100 μs
Short-circuit, ground fault, overload proof
Automatic switch on again after overload trip
Switching frequency:
for ohmic load: Max. 100 Hz
For inductive load: Max. 0.5 Hz
For lamp load: Max. 10 Hz
Maximum lamp load: 5 W
8
DI/DO 9
9
GND
10 DI/DO 10
11
DI/DO 11
12 GND
Type: Spring-loaded terminal 1 (Page 437)
Max. cross-section that can be connected: 1.5 mm
2
1)
DI: Digital input; DI/DO: Bidirectional digital input/output
2)
The rapid inputs can be used as probe inputs or as inputs for the external zero mark
3)
Data for: V
cc
= 24 V; load 48 Ω; high ("1") = 90% V
out
; low ("0") = 10% V
out
The maximum cable length that can be connected is 30 m.