Data Sheet

Data sheet 6ES7421-7BH01-0AB0
SIMATIC S7-400, digital input SM 421, isolated 16 DI; 24 V DC with
0.05 ms input delay alarm, diagnostics
Supply voltage
Load voltage L+
● Rated value (DC)
24V
● permissible range, lower limit (DC)
20.4V
● permissible range, upper limit (DC)
28.8V
Input current
from supply voltage L+, max. 120mA
from backplane bus 5 V DC, max. 130mA
Power loss
Power loss, typ. 5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
DC
● Rated value (DC)
24V
6ES7421-7BH01-0AB0 Subject to change without notice
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09/13/2019 © Copyright Siemens