Siemens SINAMICS S120 Equipment Manual page 60

Additional System Components
3.2 Option Board: Terminal Board 30 (TB30)
Digital inputs/outputs X481
Table 3-7 Terminal block X481
Terminal
1
2
3
4
5
6
7
8
Max. connectable cross-section: 0.5 mm
Type: Spring-loaded terminal 1 (see Appendix A)
1) DI: Digital input, DO: Digital output
Note
An open input is interpreted as "low".
The power supply and the digital inputs/outputs are isolated from the control unit.
Note
If a momentary interruption in the voltage occurs in the 24 V supply, the digital outputs will
be deactivated until the interruption has been rectified.
3-10
Name
1)
DI 0
DI 1
DI 2
DI 3
DO 0
DO 1
DO 2
DO 3
2
Technical specifications
Voltage: -3 V to 30 V
Typical current consumption: 10 mA at 24 V DC
Ground reference: X424. M
Signal propagation times:
L → H: Approx. 50 μs
H → L: Approx. 100 µs
Level (incl. ripple)
High level: 15 V to 30 V
Low level: -3 V to 5 V
Voltage: 24 V DC
Max. load current per output: 500 mA
Ground reference: X424.M
Continued-short-circuit-proof
Equipment Manual for Control Units and Additional System Components
Equipment Manual, (GH1), 04.2004 Edition, 6SL3097-2AH00-0BP0