西门子SM1221数字量输入模块

西门子SM1221数字量输入模块

西门子SM1221数字量输入模块

概述

  • 为CPU的本机I/O提供更多的数字量输入

  • 用于使控制器灵活地适应相关任务的要求

  • 用于使用附加输入对系统进行后续扩展

应用

数字量输入模块允许将控制器与过程中的数字信号连接。

这为用户提供了下列优势:

  • 适应性:
    使用可以根据需要混合的信号模块,用户可以使其控制器准确地满足相关任务的要求。这可以避免产生不必要的投资。可以使用带有 8 个、16 个和 32 个输入/输出通道的模块。

  • 灵活性:
    如果任务后续有所扩展,可以升级控制器。更新用户程序非常简单。

功能

SM 1221 数字量输入信号模块将过程中的外部数字信号电平转换为 S7-1200 的内部信号电平。

技术规范

Article number

6ES7221-1BF32-0XB0

6ES7221-1BH32-0XB0


DIGITAL INPUT SM 1221, 8DI, 24V DC

DIGITAL INPUT SM 1221, 16DI, 24V DC

Supply voltage



Rated value (DC)



  • ● 24 V DC

Yes

Yes

permissible range, lower limit (DC)

20.4 V

20.4 V

permissible range, upper limit (DC)

28.8 V

28.8 V

Input current



from backplane bus 5 V DC, max.

105 mA

130 mA

Digital inputs



  • ● from load voltage L+ (without load), max.

4 mA; per channel

4 mA; per channel

Output voltage



Power supply to the transmitters



  • ● present

Yes

Yes

Power loss



Power loss, typ.

1.5 W

2.5 W

Digital inputs



Number of digital inputs

8

16

  • ● in groups of

2

4

Input characteristic curve in accordance with IEC 61131, type 1

Yes

Yes

Number of simultaneously controllable inputs



all mounting positions



  • — up to 40 °C, max.

8

16

horizontal installation



  • — up to 40 °C, max.

8

16

  • — up to 50 °C, max.

8

16

vertical installation



  • — up to 40 °C, max.

8

16

Input voltage



  • ● Type of input voltage

DC

DC

  • ● Rated value (DC)

24 V

24 V

  • ● for signal "0"

5 V DC at 1 mA

5 V DC at 1 mA

  • ● for signal "1"

15 V DC at 2.5 mA

15 V DC at 2.5 mA

Input current



  • ● for signal "0", max. (permissible quiescent current)

1 mA

1 mA

  • ● for signal "1", min.

2.5 mA

2.5 mA

  • ● for signal "1", typ.

4 mA

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

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

Yes

Cable length



  • ● shielded, max.

500 m

500 m

  • ● unshielded, max.

300 m

300 m

Interrupts/diagnostics/status information



Alarms



  • ● Diagnostic alarm

Yes

Yes

Diagnostics indication LED



  • ● for status of the inputs

Yes

Yes

Potential separation



Potential separation digital inputs



  • ● between the channels, in groups of

2

4

Degree and class of protection



Degree of protection acc. to EN 60529



  • ● IP20

Yes

Yes

Standards, approvals, certificates



CE mark

Yes

Yes

CSA approval

Yes

Yes

UL approval

Yes

Yes

cULus

Yes

Yes

FM approval

Yes

Yes

RCM (formerly C-TICK)

Yes

Yes

Marine approval


Yes

Ambient conditions



Free fall



  • ● Fall height, max.

0.3 m; five times, in product package

0.3 m; five times, in product package

Ambient temperature during operation



  • ● min.

-20 °C

-20 °C

  • ● max.

60 °C

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

5°C to 55°C, 3°C / minute

Ambient temperature during storage/transportation



  • ● min.

-40 °C

-40 °C

  • ● max.

70 °C

70 °C

Air pressure acc. to IEC 60068-2-13



  • ● Storage/transport, min.

660 hPa

660 hPa

  • ● Storage/transport, max.

1 080 hPa

1 080 hPa

Relative humidity



  • ● Operation at 25 ℃ without condensation, max.

95 %

95 %

Connection method



required front connector

Yes

Yes

Mechanics/material



Enclosure material (front)



  • ● Plastic

Yes

Yes

Dimensions



Width

45 mm

45 mm

Height

100 mm

100 mm

Depth

75 mm

75 mm

Weights



Weight, approx.

170 g

210 g