| SIMATIC S7-400, DIG.INPUT MOD. SM 421, OPTIC. ISOLATED, 16 DI, 24V DC WITH 0,1 MS INPUT DELAY, ALARM, DIAGNOSTICS |
|
Supply voltage |
Load voltage L+ |
Rated value (DC) | 24 V |
permissible range, lower limit (DC) | 20.4 V |
permissible range, upper limit (DC) | 28.8 V |
Input current |
from backplane bus 5 V DC, max. | 130 mA |
from supply voltage L+, max. | 120 mA |
Power losses |
Power loss, max. | 5 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, DC | 24 V |
for signal "0" | -30 to +5 V DC |
for signal "1" | 11 to 30 V DC |
Input current |
for signal "1", typ. | 6 mA; 6 to 8 mA |
Input delay (for rated value of input voltage) |
for standard inputs |
Parameterizable | Yes; 0.1 / 0.5 / 3 ms |
Cable length |
Cable length, shielded, max. | 1000 m; 1000 m/3 ms; 70 m/0.5 ms; 30 m/0.1 ms |
Cable length unshielded, max. | 600 m; 600 m: 3 ms; 50 m: 0.5 ms; 20 m: 0.1 ms |
Encoder |
Connectable encoders |
2-wire sensor | Yes |
Permissible quiescent current (2-wire sensor), max. | 3 mA |
Interrupts/diagnostics/status information |
Alarms |
Diagnostic alarm | Yes |
Hardware interrupt | Yes |
Diagnostic messages |
Diagnostics | Yes; internal/ external fault |
Galvanic isolation |
Galvanic isolation digital inputs |
between the channels, in groups of | 8 |
between the channels and the backplane bus | Yes |
Isolation |
Isolation checked with | 500 V DC |
Dimensions |
Width | 25 mm |
Height | 290 mm |
Depth | 210 mm |
Weight |
Weight, approx. | 600 g |
Status | Mar 12, 2012 |