Introduction: Siemens/Siemens module 6ES7421-1BL01-0AA0, SIMATIC S7-400, digital input SM 421, galvanic isolation 32 DE; 24V DC
Product parameters
Input current
From the backplane bus DC 5 V, 20 mA max
Power loss
Power loss, 6 W typical
Digital inputs
Number of digital inputs 32
The number of inputs that can be controlled at the same time
The number of inputs that can be controlled at the same time is 32
Input voltage
Input voltage type DC
Rated value (DC) 24 V
For signals "0" -30 V DC to +5 V DC
For signal "1" 13 V DC to 30 V DC
Input current
For signal "0", the maximum value (allowable closed-circuit current) is 1.3 mA
For signal "1", the typical value is 7 mA
Galvanic isolation
Digital input potential isolation
Between the channels No
Between channels, the number of points is 32
Between the channel and the backplane bus Yes
insulation
Insulation test, using DC 500 V
size
Width 25 mm
Height 290 mm
Depth 210 mm
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