Siemens SIMATIC S7-300 Reference Manual page 101
Programmable logic controllers module data
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Also See for SIMATIC S7-300:
- 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 32 x 120 VAC
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 40 _C
Up to 60 _C
•
Vertical configuration
Up to 40 _C
Isolation
•
Between channels and
backplane bus
•
Between the channels
In groups of
Permitted potential difference
•
Between M
and
internal
the inputs
•
Between the inputs of
the different groups
Insulation tested with
Current consumption
•
From the backplane bus
Power dissipation of the module typ. 4 W
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
40 x 125 x 117
Approx. 300 g
No
32
max. 600 m
max. 1000 m
32
24
32
Yes
Yes
8
120 VAC
250 VAC
2500 VDC
max. 16 mA
Status, Interrupts, Diagnostics
Status display
Interrupts
Diagnostic functions
Data for Selecting a Sensor
Input voltage
•
Rated value
•
For ''1'' signal
•
For ''0'' signal
•
Frequency range
Input current
•
At ''1'' signal
Input delay
•
From ''0'' to ''1''
•
From ''1'' to ''0''
Input characteristic curve
Connection of Two-Wire
BEROs
•
Permitted bias current
Digital Modules
Green LED per channel
None
None
120 VAC
74 to 132 V
0 to 20 V
47 to 63 Hz
typ. 21 mA
max. 15 ms
max. 25 ms
According to
IEC 61131, type 2
Possible
max. 4 A
3-17
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