Siemens SIMATIC S7-300 Reference Manual page 123
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 48-125 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 at U
•
Horizontal installation
Up to 50 _C
Up to 60 _C
•
Vertical configuration
Up to 40 _C
Isolation
•
Between channels and
backplane bus
•
Between the channels
In groups of
Permiss. potential differences
•
Between the different
circuits
Insulation tested with
Current consumption
•
From the backplane bus
Power dissipation of the module typ. 4.3 W
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
40 x 125 x 120
Approx. 200 g
No
16
max. 600 m
max. 1000 m
Up to 60 V
E
Up to 146 V
8
8
8
6
8
8
Yes
Yes
8
146 VDC / 132 VAC
1500 VDC
max. 40 mA
Status, Interrupts, Diagnostics
Status display
Interrupts
Diagnostic functions
Sensor Selection Data
Input voltage
•
Rated value
•
For signal "1"
•
For signal "0"
Input current
•
At signal "1"
Input delay
•
From " 0" to "1"
•
At "1" to "0"
Input characteristic curve
Connection of Two-Wire
BEROs
•
Permitted bias current
Digital Modules
Green LED per channel
None
None
48 VDC to
125 VDC
30 V to 146 V
–146 V to 15 V
typ. 3.5 mA
0.1 ms to 3.5 ms
0.7 ms to 3.0 ms
According to
IEC 61131, type 1
Possible
max. 1 mA
3-39
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