Data Sheet

Data sheet 6ES7421-1EL00-0AA0
SIMATIC S7-400, digital input SM 421, isolated 32 DI; 120 V DC/AC
Input current
from backplane bus 5 V DC, max. 200mA
Power loss
Power loss, typ. 6.5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
AC/DC
● Rated value (UC)
120V; 47 ... 63 Hz
● for signal "0"
0 to 20 V UC
● for signal "1"
79 to 132 V AC; 80 to 132 V DC
Input current
● for signal "0", max. (permissible quiescent
current)
1mA
● for signal "1", typ.
2mA; 2 to 5 mA
Input delay (for rated value of input voltage)
for standard inputs
— at "0" to "1", min.
5ms
— at "0" to "1", max.
25ms; 10 / 20 ms
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mA
Potential separation
Potential separation digital inputs
● between the channels, in groups of
8
● between the channels and backplane bus
Yes
Isolation
Isolation tested with 1500 V AC
6ES7421-1EL00-0AA0 Subject to change without notice
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09/13/2019 © Copyright Siemens