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6ES7221-1BF32-0XB0

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Siemens 6ES7221-1BF32-0XB0

SIMATIC S7-1200, Digital input SM 1221, 8 DI, 24 V DC, Sink/Source

General information
Product type designation		SM 1221, DI 8x24 V DC
Supply voltage
Rated value (DC)		24 V
permissible range, lower limit (DC)		20.4 V
permissible range, upper limit (DC)		28.8 V
Input current
from backplane bus 5 V DC, max.		105 mA
Digital inputs
● from load voltage L+ (without load), max.		4 mA; per channel
output voltage / header
supply voltage of the transmitters / header
● present		Yes
Power loss
Power loss, typ.		1.5 W
Digital inputs
Number of digital inputs		8
● in groups of		2
Input characteristic curve in accordance with IEC 61131, type 1		Yes
Number of simultaneously controllable inputs
all mounting positions
— up to 40 °C, max.		8
horizontal installation
— up to 40 °C, max.		8
— up to 50 °C, max.		8
vertical installation
— up to 40 °C, max.		8
Input voltage
● Rated value (DC)		24 V
● for signal "0"		5 V DC at 1 mA
● for signal "1"		15 V DC at 2.5 mA
Input current
● for signal "0", max. (permissible quiescent current)		1 mA
● for signal "1", min.		2.5 mA
● for signal "1", typ.		4 mA
Input delay (for rated value of input voltage)
for standard inputs
— parameterizable		Yes; 0.2 ms, 0.4 ms, 0.8 ms, 1.6 ms, 3.2 ms, 6.4 ms and 12.8 ms, selectable in groups of four
for interrupt inputs
— parameterizable		Yes
Cable length
● shielded, max.		500 m
● unshielded, max.		300 m
Interrupts/diagnostics/status information
Alarms
● Diagnostic alarm		Yes
Diagnostics indication LED
● for status of the inputs		Yes
Potential separation
Potential separation digital inputs
● between the channels, in groups of		2
Degree and class of protection
IP degree of protection		IP20