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SIMATIC S7-400, SM 421 DIGITAL INPUT MODULE, OPTIC. ISOLATED, 16 DI, 24 - 60V UC, ALARM, DIAGNOSTICS |
Input current |
from backplane bus 5 V DC, max. |
150 mA |
Power losses |
Power loss, max. |
8 W; 3.5 W (24 V DC); 6.5 W (48 V DC); 8.0 W (60 V DC) |
Digital inputs |
Number of digital inputs |
16 |
Number of simultaneously controllable inputs |
all mounting positions |
— up to 40 °C, max. |
16 |
— up to 60 °C, max. |
16 |
Input voltage |
● Type of input voltage |
AC/DC |
● Rated value, UC |
24 V; 24 to 60 V UC |
● for signal "0" |
-6 to +6 V DC/ 0 to 5 V AC |
● for signal "1" |
15 to 72 V DC; -15 to -72 V DC; 15 to 60 V AC |
● Frequency range |
47 to 63 Hz AC / DC |
Input current |
● for signal "1", typ. |
4 mA; 4 to 10 mA |
Input delay (for rated value of input voltage) |
for standard inputs |
— Parameterizable |
Yes |
— Rated value |
0.5 ms; 0.5 / 3 / 10 / 20 ms |
Cable length |
● Cable length, shielded, max. |
1 000 m |
● Cable length unshielded, max. |
600 m; 600 m: 3, 10, 20 ms; 100 m: 0,5 ms |
Encoder |
Connectable encoders |
● 2-wire sensor |
Yes |
— Permissible quiescent current (2-wire sensor), max. |
0.5 mA; 0.5 to 2 mA |
Interrupts/diagnostics/status information |
Alarms |
● Diagnostic alarm |
Yes; Parameterizable |
● Hardware interrupt |
Yes; Parameterizable |
Diagnostic messages |
● Diagnostics |
Yes; internal/ external fault |
Galvanic isolation |
Galvanic isolation digital inputs |
● between the channels, in groups of |
1 |
● between the channels and the backplane bus |
Yes |
Isolation |
Isolation checked with |
1500 V AC |
Dimensions |
Width |
25 mm |
Height |
290 mm |
Depth |
210 mm |
Weights |
Weight, approx. |
600 g |
last modified: |
25.09.2014 |