Data Sheet
Data sheet 6ES7421-7DH00-0AB0
SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 24 - 60 V,
alarm, diagnostics
Input current
from backplane bus 5 V DC, max. 150mA
Power loss
Power loss, typ. 8W; 3.5 W (24 V DC); 6.5 W (48 V DC); 8.0 W (60 V DC)
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)
24V; 24 V UC to 60 V UC (47 ... 63 Hz)
● for signal "0"
-6 to +6 V DC/ 0 to 5 V AC
● for signal "1"
15 to 72 V DC; -15 to -72 V DC; 15 to 60 V AC
Input current
● for signal "1", typ.
4mA; 4 to 10 mA
Input delay (for rated value of input voltage)
for standard inputs
— parameterizable
Yes
6ES7421-7DH00-0AB0 Subject to change without notice
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09/14/2019 © Copyright Siemens