| SIMATIC S7-400, DIGITAL INPUT SM 421, OPTIC. ISOLATED, 16 DI, 120 V AC, WITH 1 COMMON POINT |
|
Supply voltage |
Load voltage L1 |
Rated value (AC) | 120 V |
permissible range, lower limit (AC) | 74 V |
permissible range, upper limit (AC) | 132 V |
Input current |
from backplane bus 5 V DC, max. | 100 mA |
Power losses |
Power loss, max. | 20 W |
Digital inputs |
Number/binary inputs | 16 |
Number of simultaneously controllable inputs |
all mounting positions |
up to 40 °C, max. | 16 |
up to 60 °C, max. | 16 |
Input voltage |
Rated value, AC | 120 V |
for signal "0" | 0 to 20 V AC |
for signal "1" | 74 to 132 V AC |
Frequency range | 47 to 63 Hz |
Input current |
for signal "0", max. (permissible quiescent current) | 4 mA; 0 to 4 mA |
for signal "1", typ. | 6 mA; 6 to 20 mA |
Input delay (for rated value of input voltage) |
for standard inputs |
Parameterizable | Yes |
at "0" to "1", min. | 2 ms |
at "0" to "1", max. | 15 ms |
Cable length |
Cable length, shielded, max. | 1000 m |
Cable length unshielded, max. | 600 m |
Encoder |
Connectable encoders |
2-wire sensor | Yes |
Permissible quiescent current (2-wire sensor), max. | 4 mA |
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 |
Weight |
Weight, approx. | 650 g |
Status | Mar 12, 2012 |