| Article number |
6ES7221-1BF32-0XB0
|
|
|
SIMATIC S7-1200, Digital input SM 1221, 8 DI, 24 V DC, Sink/Source |
| General information |
| Product type designation |
SM 1221, DI 8x24 V DC |
| Supply voltage |
| 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. |
105 mA |
| Digital inputs |
| ● from load voltage L+ (without load), max. |
4 mA; per channel |
| output voltage / header |
| supply voltage of the transmitters / header |
| ● present |
Yes |
| Power loss |
| Power loss, typ. |
1.5 W |
| Digital inputs |
| Number of digital inputs |
8 |
| ● in groups of |
2 |
| Input characteristic curve in accordance with IEC 61131, type 1 |
Yes |
| Number of simultaneously controllable inputs |
| all mounting positions |
| — up to 40 °C, max. |
8 |
| horizontal installation |
| — up to 40 °C, max. |
8 |
| — up to 50 °C, max. |
8 |
| vertical installation |
| — up to 40 °C, max. |
8 |
| Input voltage |
| ● Rated value (DC) |
24 V |
| ● for signal "0" |
5 V DC at 1 mA |
| ● for signal "1" |
15 V DC at 2.5 mA |
| Input current |
| ● for signal "0", max. (permissible quiescent current) |
1 mA |
| ● for signal "1", min. |
2.5 mA |
| ● for signal "1", typ. |
4 mA |
| Input delay (for rated value of input voltage) |
| for standard inputs |
| — parameterizable |
Yes; 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in groups of four |
| for interrupt inputs |
| — parameterizable |
Yes |
| Cable length |
| ● shielded, max. |
500 m |
| ● unshielded, max. |
300 m |
| Interrupts/diagnostics/status information |
| Alarms |
| ● Diagnostic alarm |
Yes |
| Diagnostics indication LED |
| ● for status of the inputs |
Yes |
| Potential separation |
| Potential separation digital inputs |
| ● between the channels, in groups of |
2 |
| Degree and class of protection |
| IP degree of protection |
IP20 |
| Standards, approvals, certificates |
| CE mark |
Yes |
| CSA approval |
Yes |
| UL approval |
Yes |
| cULus |
Yes |
| FM approval |
Yes |
| RCM (formerly C-TICK) |
Yes |
| KC approval |
Yes |
| Marine approval |
Yes |
| Ambient conditions |
| Free fall |
| ● Fall height, max. |
0.3 m; five times, in product package |
| Ambient temperature during operation |
| ● min. |
-20 °C |
| ● max. |
60 °C |
| ● horizontal installation, min. |
-20 °C |
| ● horizontal installation, max. |
60 °C |
| ● vertical installation, min. |
-20 °C |
| ● vertical installation, max. |
50 °C |
| ● permissible temperature change |
5°C to 55°C, 3°C / minute |
| Ambient temperature during storage/transportation |
| ● min. |
-40 °C |
| ● max. |
70 °C |
| Air pressure acc. to IEC 60068-2-13 |
| ● Storage/transport, min. |
660 hPa |
| ● Storage/transport, max. |
1 080 hPa |
| Relative humidity |
| ● Operation at 25 ℃ without condensation, max. |
95 % |
| connection method |
| required front connector |
Yes |
| Mechanics/material |
| Enclosure material (front) |
|
| ● Plastic |
Yes |
| Dimensions |
| Width |
45 mm |
| Height |
100 mm |
| Depth |
75 mm |
| Weights |
| Weight, approx. |
170 g |