Data Sheet

Data sheet 6ES7421-1FH20-0AA0

SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 120/230V

Inputs according to IEC1131-2 Type 2

Input current

from backplane bus 5 V DC, max. 80mA

Power loss

Power loss, typ. 12W

Digital inputs

Number of digital inputs 16

Number of simultaneously controllable inputs

● Number of simultaneously controllable inputs

Input voltage

● Type of input voltage

AC/DC

● Rated value (UC)

230V; 120/230 V UC (47 ... 63 Hz)

● for signal "0"

0 to 40 V AC/ -40 to +40 V DC

● for signal "1"

74 to 264 V AC; 80 to 264 V DC, -80 to -264 V

Input current

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

current)

6mA; AC: 6 mA; DC: 2 mA

● for signal "1", typ.

10mA; at 120 V: 10 mA AC, 1.8 mA DC; at 230 V: 14 mA AC, 2

mA DC

6ES7421-1FH20-0AA0 Subject to change without notice

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Data sheet 6ES7421-1FH20-0AA0 SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 120/230V Inputs according to IEC1131-2 Type 2 Input current from backplane bus 5 V DC, max. 80 mA Power loss Power loss, typ. 12 W Digital inputs Number of digital inputs 16 Number of simultaneously controllable inputs ● Number of simultaneously controllable inputs 16 Input voltage ● Type of input voltage AC/DC ● Rated value (UC) 230 V; 120/230 V UC (47 ...
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Input delay (for rated value of input voltage) for standard inputs — at "0" to "1", max. 20 ms; AC: 20 ms; DC: 15 ms Cable length ● shielded, max. 1 000 m ● unshielded, max. 600 m Encoder Connectable encoders ● 2-wire sensor — permissible quiescent current (2-wire sensor), max.