SIPLUS S7-400 SM 421 digital input modules Siemens

Область применения



Digital input modules can be used to connect the control to digital process signals. They are suitable for connecting standard switches and two-wire proximity switches (BERO).

Обзор


  • Digital inputs for SIMATIC S7-400
  • For connection of switches and 2-wire proximity switches (BEROs)

Note:

SIPLUS extreme products are based on SIMATIC standard products. The contents listed here were taken from the respective standard products. SIPLUS extreme specific information was added.

Technical documentation on SIPLUS can be found here:
http://www.siemens.de/siplus-extreme

Дизайн



The digital input modules have the following mechanical features:

  • Compact configuration:
    The rugged plastic housing contains:
    • Green LEDs to indicate signal states at the inputs
    • One red LED each to indicate internal and external faults or errors in modules with diagnostic and process interrupts
    • Labeling strips
  • Simple assembly
  • User-friendly wiring:
    The modules are wired by means of a plug-in front connector.

Функции



Digital input modules convert the levels of the external digital signals from the process into the internal signal level of the S7-400.

Технические данные



Order number

6AG1421-1BL01-2AA0

SIPLUS S7-400 SM421 32DE

Input current

 

from backplane bus 5 V DC, max.

20 mA

Power loss

 

Power loss, typ.

6 W

Digital inputs

 

Number of digital inputs

32

Number of simultaneously controllable inputs

 

  • Number of simultaneously controllable inputs

32

Input voltage

 

  • Type of input voltage

DC

  • Rated value (DC)

24 V

  • for signal "0"

-30V DC to +5V DC

  • for signal "1"

13 V DC to 30 V DC

Input current

 

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

1.3 mA

  • for signal "1", typ.

7 mA

Cable length

 

  • shielded, max.

1 000 m

  • unshielded, max.

600 m

Encoder

 

Connectable encoders

 

  • 2-wire sensor

Yes

  • permissible quiescent current (2-wire sensor), max.

1.5 mA

Potential separation

 

Potential separation digital inputs

 

  • between the channels, in groups of

32

  • between the channels and backplane bus

Yes

Isolation

 

Isolation tested with

500 V DC

Ambient conditions

 

Ambient temperature during operation

 

  • min.

-25 °C; = Tmin

  • max.

60 °C; = Tmax

Extended ambient conditions

 

  • relative to ambient temperature-atmospheric pressure-installation altitude

Tmin ... Tmax at 1080 hPa ... 795 hPa (-1000 m ... +2000 m)

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