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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 6ES7221-1EF22-0XA0 |
| Alternative Part Number | 6ES72211EF220XA0 |
| Manufacturer | Siemens |
| Category | PLC Systems |
| Family | Simatic S7 |
| Type | Digital Input Module |
| Number of Inputs | 8 Inputs |
| Input Voltage Type | AC |
| Rated Input Voltage | 230 V; 220/230 V AC (47 to 63 Hz) |
| Input Voltage for Signal "0" | Up to 20 V AC |
| Input Voltage for Signal "1" | 79 V AC or more |
| Input Current for Signal "1" | Typical 2.5 mA |
| Input Delay | Maximum 15 ms for standard inputs |
| Cable Length, Shielded | Maximum 500 m |
| Cable Length, Unshielded | Maximum 300 m |
| Connectable Encoders | 2-wire sensor (Yes) |
| Galvanic Isolation | Yes; Optocoupler |
| Isolation Between Channels | In groups of 1; 8 groups |
| Connection Method | Plug-in I/O terminals |
| Dimensions (Width x Height x Depth) | 71.2 mm x 80 mm x 62 mm |
| Weight | Approximately 160 g |
| Commodity Code | 853890 |
The Siemens 6ES7221-1EF22-0XA0 is a high-quality digital input module designed for seamless integration with the SIMATIC S7-200 PLC systems. This module is engineered to provide reliable and accurate performance with its 8 isolated digital inputs that can handle 120/230 V AC, making it suitable for a diverse range of industrial applications.
With input characteristic curves that comply with IEC 61131, Type 1 standards, the module ensures precise signal processing. The inputs are designed to detect "0" signals up to 20 V AC and "1" signals at 79 V AC or more, with a typical input current for signal "1" of 2.5 mA. This sensitivity allows for accurate data capture and control in automated processes.
The module boasts a compact design with dimensions of 71.2 mm in width, 80 mm in height, and 62 mm in depth, making it an efficient choice for space-constrained environments. Additionally, the module features plug-in I/O terminals for straightforward installation and maintenance.
Galvanic isolation via optocouplers between each of the 8 channels enhances the module's operational safety and signal integrity, protecting against electrical noise and potential surges. This isolation also allows for the connection of 2-wire sensors, with a permissible quiescent current of up to 1 mA.
With a typical power loss of 3 W and a maximum input current from the backplane bus of 30 mA, the module is an energy-efficient addition to any control system. Its robust design and reliable performance make the Siemens 6ES7221-1EF22-0XA0 an essential component for industrial automation tasks requiring precise digital input processing.
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Frequently Asked Questions
What type of input voltage does this digital input module support?
The digital input module supports AC type of input voltage, with a rated value of 230 V AC, operating within a frequency range of 47 to 63 Hz.
Can this module be used with 2-wire sensors?
Yes, the module can be connected to 2-wire sensors and supports a permissible quiescent current of up to 1 mA for these sensors.
Is there any galvanic isolation for the digital inputs?
Indeed, the digital inputs feature galvanic isolation via optocouplers, with isolation between the channels in groups of one, totalling 8 groups.
What are the dimensions of this digital input module?
The module has a width of 71.2 mm, a height of 80 mm, and a depth of 62 mm.
What is the maximum input delay for this module?
The maximum input delay for standard inputs, at the rated value of input voltage, is 15 ms for a transition from '0' to '1'.
How much power does the module typically consume?
The typical power loss for the module is approximately 3 W.
What is the maximum cable length that can be used with this module?
For shielded cables, the maximum length is 500 m, and for unshielded cables, it is 300 m.
How does this module connect to the input/output terminals?
The module utilises plug-in I/O terminals for easy and secure connections.
What is the approximate weight of the module?
The module weighs approximately 160 g.
How many digital inputs does this module have?
The module is equipped with 8 digital inputs.
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