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SIMATIC S7-1200

Digital modules

SB 1221 digital input module

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Siemens ST 70 · 2011

■

Overview

• Digital inputs as a supplement to the integral I/O of

SIMATIC S7-1200 CPUs

• Can be plugged directly into the CPU

■

Technical specifications

6ES7 221-3AD30-0XB0 6ES7 221-3BD30-0XB0

Product type designation SB 1221 4xDI 5 V DC 200 kHz SB 1221 4xDI 24 V DC 200 kHz

Supply voltages

Power supply to the transmitters

• Supply current, max. 4 mA; per channel 4 mA; per channel

Current consumption

from backplane bus 5 V DC, typ. 50 mA 50 mA

Power losses

Power loss, typ. 1W 1W

Digital inputs

Number of digital inputs 4; Current-sourcing 4; Current-sourcing

• in groups of

1 1

Number of simultaneously controllable inputs

• all mounting positions

- Concurrently controllable inputs, up to 40 °C 4 4

Input characteristic curve acc. to IEC 1131,

Type 1

Yes

Input characteristic curve acc. to IEC 1131,

Type 2

Yes

Input voltage

• Rated value, DC 5V 24 V

• for signal "0" 0 to 1 V 0 to 5 V

• for signal "1" 2 to 6 V 15 to 30 V

Input current

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

current)

3mA 2mA

• for signal "1", min. 6mA 5.8 mA

• for signal "1", typ.

14 mA

Input delay (for rated value of input voltage)

• for standard inputs

- parameterizable Yes; 0.2, 0.4, 0.8, 1.6, 3.2, 6.4, and 12.8 ms,

selectable in groups of four

Yes; 0.2, 0.4, 0.8, 1.6, 3.2, 6.4, and 12.8 ms,

selectable in groups of four

- at "0" to "1", max.

2μs 2.5 μs

• for interrupt inputs

- parameterizable Yes Yes

• for counter/technological functions

- parameterizable Yes Yes

Cable length

• Cable length, shielded, max. 50 m; Shielded, twisted wire pair 50 m; Standard input: 500 m, high-speed

counters: 50 m

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 121 122

SIMATIC S7-1200 1

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AMX AXP-AI8 ANALOG 8-INPUT BOARD Manuale Utente Pagina 43

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