6ES7421-7BH01-0AB0 SM421, 16DI, DC24V, 0.05MS INPUT DELAY
SIMATIC S7-400, DIGITAL INPUT SM 421, GALVANICALLY ISOLATED, 16 DI, 24V DC WITH 0.05 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 supply voltage L+, max. |
120 mA |
| from backplane bus 5 V DC, max. |
130 mA |
| Power loss |
| Power loss, typ. |
5 W |
| Digital inputs |
| Number of digital inputs |
16 |
| Number of simultaneously controllable inputs |
| ● Number of simultaneously controllable inputs |
16 |
| Input voltage |
| ● Type of input voltage |
DC |
| ● Rated value (DC) |
24 V |
| ● for signal "0" |
-30 V DC to +5 V DC |
| ● for signal "1" |
11 V DC 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 |
| — at "0" to "1", min. |
3 µs; 0.05 / 0.1 / 0.5 / 3 ms |
| Cable length |
| ● shielded, max. |
1 000 m; 1000 m: 3 ms, 70 m: 0.5 ms, 30 m: 0.1 ms, 30 m: 0.05 ms |
| ● unshielded, max. |
600 m; 600 m: 3 ms; 50 m: 0,5 ms; 20 m: 0,1 ms; 20 m: 0,05 ms |
| Encoder |
| Connectable encoders |
| ● 2-wire sensor |
Yes |
| — permissible quiescent current (2-wire sensor), max. |
3 mA |
| Interrupts/diagnostics/status information |
| Diagnostics |
Yes; internal/ external fault |
| Alarms |
| ● Diagnostic alarm |
Yes; Parameterizable |
| ● Hardware interrupt |
Yes; Parameterizable |
| Potential separation |
| Potential separation digital inputs |
| ● between the channels, in groups of |
8 |
| ● between the channels and backplane bus |
Yes |
| Isolation |
| Isolation tested with |
500 V DC |
| Dimensions |
| Width |
25 mm |
| Height |
290 mm |
| Depth |
210 mm |
