Siemens SIMATIC Manual page 97

3.12 Digital input module SM 321; DI 16 x DC 24/125 V; with hardware and diagnostic interrupts (6ES7321-7EH00-0AB0)
Technical specifications
Current consumption
•
from the backplane bus
Power loss of the module
•
L+ = 24 V
•
L+ = 100 V
Status, interrupts, diagnostics
Status displays
Interrupts
•
Hardware interrupt
•
Diagnostic interrupt
•
Wire break
Diagnostic functions
•
Group error display
•
Reading diagnostics information
Monitoring for
•
Wire break
Encoder selection data
Input voltage
•
Rated value
•
"1" signal
•
"0" signal
Input current
•
"1" signal
Input characteristics
Connection of 2-wire BEROs
•
Permissible quiescent current
Wiring of the signal transmitters
Time/frequency
Input delay
•
programmable
•
Rated value
Fixed current limitation of the sensor for wire-break detection
Overvoltage protection
* To obtain a time stamp accuracy of < 1 ms, the input delay must be configured to 0.1 ms.
** To obtain a high immunity to interference, use a shielded cable and set input delay to 0.1 ms.
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
max. 90 mA
typ. 2 W
typ. 6.5 W
green LED per channel
programmable
programmable
programmable
programmable
red LED (SF)
supported
yes, sensing I < 1 mA
From 15 to 146 V
from -146 V to + 5 V
Typ. 3.5 mA
to IEC 61131, Type 1
supported
max. 1 mA
with 40-pin front connector
Yes
typ. 0.1/0.5/3/15/20 ms**
See previous table for dependence on rated input
voltage and resistance
Dehnconnect RK DCO RK ME110; Art. No. 919 923
Digital modules
97