Siemens SIMATIC S7-300 Reference Manual page 103
Programmable logic controllers module data
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- Manual (676 pages) ,
- Installation and operating manual (356 pages) ,
- Hardware and installation manual (256 pages)
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Technical specifications of the SM 321; DI 16 x 24 VDC
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
Weight
Data for Specific Module
Supports clocked
operation
Number of inputs
Length of cable
•
Unshielded
•
Shielded
Voltages, Currents, Potentials
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
Permitted potential difference
•
Between the different
circuits
Insulation tested with
Current consumption
•
From the backplane bus
Power dissipation of the module typ. 3.5 W
Status, Interrupts, Diagnostics
Status display
Interrupts
Diagnostic functions
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
40 x 125 x 117
Approx. 200 g
No
16
max. 600 m
max. 1000 m
16
16
Yes
75 VDC / 60 VAC
500 VDC
max. 10 mA
Green LED per channel
None
None
Data for Selecting a Sensor
Input voltage
•
Rated value
•
For signal "1"
•
For signal "0"
Input current
•
At signal "1"
Input delay
•
At "0" to "1"
•
At "1" to "0"
Input characteristic curve
Connection of Two-Wire
BEROs
•
Permitted bias current
Digital Modules
24 VDC
13 to 30 V
–30 to + 5 V
typ. 7 mA
1.2 to 4.8 ms
1.2 to 4.8 ms
According to
IEC 61131, type 1
Possible
max. 1.5 mA
3-19
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