Data Sheet

Data sheet 6ES7321-1CH20-0AA0

SIMATIC S7-300, Digital input SM 321, isolated, 16 DI, 48-125 V DC,

1x 20-pole

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 loss

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.

6ES7321-1CH20-0AA0 Subject to change without notice

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Data sheet 6ES7321-1CH20-0AA0 SIMATIC S7-300, Digital input SM 321, isolated, 16 DI, 48-125 V DC, 1x 20-pole 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 loss Power loss, typ. 4.
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— 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; 48 V DC to 125 V DC ● for signal "0" -146 V DC to +15 V DC ● for signal "1" 30 V DC to 146 V 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 — at "1" to "0", min. 0.7 ms — at "1" to "0", max.
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● between the channels and backplane bus Yes; Optocoupler Permissible potential difference between different circuits 146 V DC/132 V AC Isolation Isolation tested with 1500 V DC Connection method required front connector 20-pin Dimensions Width 40 mm Height 125 mm Depth 120 mm Weights Weight, approx.