6ES7321-1CH20-0AA0 SM321, 16DI, DC48-125V

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Product Code: 6ES7321-1CH20-0AA0

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6ES7321-1CH20-0AA0

		SIMATIC S7-300, DIGITAL INPUT SM 321, OPTICALLY ISOLATED, 16 DI, DC 48-125V, 1 X 20 PIN
Supply voltage
Load voltage L+
● Rated value (DC)		48 V
● permissible range, lower limit (DC)		48 V
● permissible range, upper limit (DC)		125 V
Input current
from backplane bus 5 V DC, max.		40 mA
Power losses
Power loss, typ.		4.3 W
Digital inputs
Number of digital inputs		16
Input characteristic curve in accordance with IEC 61131, type 1		Yes
Number of simultaneously controllable inputs
horizontal installation
— up to 40 °C, max.		8
— up to 60 °C, max.		8; 6 to Ue 146 V
vertical installation
— up to 40 °C, max.		8
Input voltage
● Type of input voltage		DC
● Rated value, DC		48 V; 48V DC to 125V DC
● for signal "0"		DC -146V to DC +15V
● for signal "1"		30V DC to 146V DC
Input current
● for signal "1", typ.		3.5 mA
Input delay (for rated value of input voltage)
for standard inputs
— Parameterizable		No
— at "0" to "1", min.		0.1 ms
— at "0" to "1", max.		3.5 ms
Cable length
● Cable length, shielded, max.		1 000 m
● Cable length unshielded, max.		600 m
Encoder
Connectable encoders
● 2-wire sensor		Yes
— Permissible quiescent current (2-wire sensor), max.		1 mA
Isochronous mode
Isochronous operation (application synchronized up to terminal)		No
Interrupts/diagnostics/status information
Alarms
● Alarms		No
● Diagnostic alarm		No
● Hardware interrupt		No
Diagnostic messages
● Diagnostic functions		No
Diagnostics indication LED
● Group error SF (red)		No
● Status indicator digital input (green)		Yes
Galvanic isolation
Galvanic isolation digital inputs
● between the channels		No
● between the channels, in groups of		8
● between the channels and the backplane bus		Yes; Optocoupler
Permissible potential difference
between different circuits		146V DC/132V AC
Isolation
Isolation checked with		1500 V DC
Connection method
required front connector		20-pin
Dimensions
Width		40 mm
Height		125 mm
Depth		120 mm
Weights
Weight, approx.		200 g
last modified:		25.09.2014