Siemens SIMATIC S7-300 Reference Manual page 129

Technical specifications of the SM 321; DI 8 x 120/230 VAC ISOL
Dimensions and Weight
Dimensions W x H x D
Weight
Data for Specific Module
Supports clocked
operation
Number of inputs
Length of cable
•
Unshielded
•
Shielded
Voltages, Currents, Potentials
Rated load voltage L1
All load voltages must be of the
same phase
Number of inputs that can be
triggered simultaneously
•
Horizontal configuration
Up to 60 °C
•
Vertical configuration
Up to 40 °C
Isolation
•
Between channels and
backplane bus
•
Between channels
In groups of
Permitted potential difference
•
Between M and the
internal
inputs
•
Between the inputs of the
different groups
Insulation tested with
•
Between M and the
internal
inputs
•
Between the inputs of the
different groups
Current consumption
•
From the backplane bus
Power dissipation of the module typ. 4.9 W
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
40 x 125 x 117
Approx. 240 g
No
8
max. 600 m
max. 1000 m
120/230 VAC
8
8
Yes
Yes
1
230 VAC
500 VAC
1500 VAC
2000 VAC
max. 100 mA
Status, Interrupts, Diagnostics
Status display
Interrupts
Diagnostic functions
Data for Selecting a Sensor
Input voltage
•
Rated value
•
For signal "1"
•
For signal "0"
•
Frequency range
Input current
•
At signal "1"
120 V, 60 Hz
230 V, 50 Hz
Input delay
•
"0" to "1"
•
"0" to "1"
Input characteristic curve
Connection of Two-Wire
BEROs
•
Permitted bias current
Digital Modules
Green LED per channel
None
None
120/230 VAC
79 to 264 V
0 to 40 V
47 to 63 Hz
typ. 7.5 mA
typ. 17.3 W
max. 25 ms
max. 25 ms
According to
IEC 61131, type 1
Possible
max. 2 mA
3-45