6ES7321-1BL00-0AA0

SIMATIC S7-300, digital input SM 321, isolated 32 DI, 24 V DC, 1x 40-pole

Siemens spare part — S7-300 product cancellation (PM410, 1 October 2025); available as a spare part until 2033.

Kategoria produktu

Moduły cyfrowe

Producent

SIEMENS

Seria produktów

S7-300

General information
Product function
Isochronous mode	No
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 backplane bus 5 V DC, max.	15 mA
Power loss
Power loss, typ.	6.5 W
Digital inputs
Number of digital inputs	32
Input characteristic curve in accordance with IEC 61131, type 1	Yes
Number of simultaneously controllable inputs
horizontal installation
up to 40 °C, max.	32
up to 60 °C, max.	16
vertical installation
up to 40 °C, max.	32
Input voltage
Type of input voltage	DC
Rated value (DC)	24 V
for signal "0"	-30 to +5 V
for signal "1"	13 to 30V
Input current
for signal "1", typ.	7 mA
Input delay (for rated value of input voltage)
for standard inputs
parameterizable	No
at "0" to "1", min.	1.2 ms
at "0" to "1", max.	4.8 ms
at "1" to "0", min.	1.2 ms
at "1" to "0", max.	4.8 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.	1.5 mA
Interrupts/diagnostics/status information
Alarms	No
Diagnostics function	No
Alarms
Diagnostic alarm	No
Hardware interrupt	No
Diagnostics indication LED
Status indicator digital input (green)	Yes
Potential separation
Potential separation digital inputs
between the channels	No
between the channels, in groups of	16
between the channels and backplane bus	Yes; Optocoupler
Isolation
Isolation tested with	500 V DC
Connection method
required front connector	40-pin
Dimensions
Width	40 mm
Height	125 mm
Depth	120 mm
Weights
Weight, approx.	260 g
Approvals / Certificates