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SIMATIC S7-1200, Digital b SM 1221, 16 DI, 24 V DC, Sink/Source | |
| General inbation | ||
| Product type designation | SM 1221, DI 16x24 V DC | |
| Supply voltage | ||
| Rated value (DC) | ||
| 鈼� 24 V DC | Yes | |
| 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 | |
| Digital bs | ||
| 鈼� from load voltage L+ (without load), max. | 4 mA; per channel | |
| Output voltage | ||
| Power supply to the transmitters | ||
| 鈼� present | Yes | |
| Power loss | ||
| Power loss, typ. | 2.5 W | |
| Digital bs | ||
| Number of digital bs | 16 | |
| 鈼� in groups of | 4 | |
| Input characteristic curve in accordance with IEC 61131, type 1 | Yes | |
| Number of simultaneously controllable bs | ||
| all mounting bs | ||
| 鈥� up to 40 掳C, max. | 16 | |
| horizontal installation | ||
| 鈥� up to 40 掳C, max. | 16 | |
| 鈥� up to 50 掳C, max. | 16 | |
| vertical installation | ||
| 鈥� up to 40 掳C, max. | 16 | |
| Input voltage | ||
| 鈼� Type of b voltage | DC | |
| 鈼� Rated value (DC) | 24 V | |
| 鈼� for signal "0" | 5 V DC at 1 mA | |
| 鈼� for signal "1" | 15 V DC at 2.5 mA | |
| Input current | ||
| 鈼� for signal "0", max. (permissible quiescent current) | 1 mA | |
| 鈼� for signal "1", min. | 2.5 mA | |
| 鈼� for signal "1", typ. | 4 mA | |
| Input delay (for rated value of b voltage) | ||
| for standard bs | ||
| 鈥� beterizable | 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 bs | ||
| 鈥� beterizable | Yes | |
| Cable length | ||
| 鈼� shielded, max. | 500 m | |
| 鈼� unshielded, max. | 300 m | |
| Interrupts/diagnostics/status inbation | ||
| Alarms | ||
| 鈼� Diagnostic alarm | Yes | |
| Diagnostics indication LED | ||
| 鈼� for status of the bs | Yes | |
| Potential separation | ||
| Potential separation digital bs | ||
| 鈼� between the channels, in groups of | 4 | |
| Degree and class of protection | ||
| Degree of protection acc. to EN 60529 | ||
| 鈼� IP20 | Yes | |
| Standards, approvals, certificates | ||
| CE mark | Yes | |
| CSA approval | Yes | |
| UL approval | Yes | |
| cULus | Yes | |
| FM approval | Yes | |
| RCM (berly C-TICK) | Yes | |
| Marine approval | Yes | |
| Ambient conditions | ||
| Free fall | ||
| 鈼� Fall height, max. | 0.3 m; five times, in product package | |
| Ambient temperature during operation | ||
| 鈼� min. | -20 掳C | |
| 鈼� max. | 60 掳C | |
| 鈼� permissible temperature change | 5掳C to 55掳C, 3掳C / minute | |
| Ambient temperature during storage/transportation | ||
| 鈼� min. | -40 掳C | |
| 鈼� max. | 70 掳C | |
| Air pressure acc. to IEC 60068-2-13 | ||
| 鈼� Storage/transport, min. | 660 hPa | |
| 鈼� Storage/transport, max. | 1 080 hPa | |
| Relative humidity | ||
| 鈼� Operation at 25 鈩� without condensation, max. | 95 % | |
| Connection b | ||
| required front connector | Yes | |
| Mechanics/material | ||
| Enclosure material (front) | ||
| 鈼� Plastic | Yes | |
| Dimensions | ||
| Width | 45 mm | |
| Height | 100 mm | |
| Depth | 75 mm | |
| Weights | ||
| Weight, approx. | 210 g | |
| last modified: | 10/31/2018 | |
