

Siemens 6ES7221 1BH32 0XB0
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Siemens 6ES7221 1BH32 0XB0
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Description
The Siemens 6ES7221 1BH32 0XB0 is the SIMATIC S7-1200 series Digital input SM 1221 module, it has 16 DI & 24 V DC, Sink/Source. The part number 6ES7221-1BH32-0XB0 refers to a Siemens SM 1221 Digital Input Module that is part of the Siemens S7-1200 series of programmable logic controllers (PLCs). This module is designed to expand the input capacity of the S7-1200 PLC by providing additional digital input channels. If need this 6ES72211BH320XB0 contact BAT Power Solution, Via E-mail/WhatsApp: +8801713722455/+8801911300632
Key Features Siemens 6ES7221 1BH32 0XB0
- Digital Inputs:
- The SM 1221 module provides 16 digital input channels.
- These inputs are designed to accept standard 24V DC signals, which is typical for industrial automation environments.
- 24V DC Operation:
- The module operates on a 24V DC supply, which is commonly used in industrial control systems for its reliability and safety.
- Status Indicators:
- Each input channel has a corresponding LED indicator, allowing for easy status monitoring of the inputs directly on the module.
- Compact Design:
- The module has a compact form factor, making it easy to integrate into control cabinets without taking up much space.
- Seamless Integration:
- The SM 1221 module is designed to integrate seamlessly with the Siemens S7-1200 PLC system, expanding its capability to interface with additional digital input devices such as sensors, switches, and buttons.
| General information | |
| Product type designation | SM 1221, DI 16×24 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. | 130 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. | 2.5 W |
| Digital inputs | |
| Number of digital inputs | 16 |
| ● in groups of | 4 |
| Input characteristic curve in accordance with IEC 61131, type 1 | Yes |
| Number of simultaneously controllable inputs | |
| all mounting positions | |
| — up to 40 °C, max. | 16 |
| horizontal installation | |
| — up to 40 °C, max. | 16 |
| — up to 50 °C, max. | 16 |
| vertical installation | |
| — up to 40 °C, max. | 16 |
| 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 | 4 |
| 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 |
| ● 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. | 210 g |
The Siemens 6ES7221-1BH32-0XB0 SM 1221 Digital Input Module is a versatile expansion module for the S7-1200 PLC series, offering 16 digital input channels. It is well-suited for a wide range of industrial automation tasks, providing reliable input signal processing for applications in machine automation, process control, and building management.









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