Siemens SIMATIC S7-300 Module data Reference Manual

Digital Modules
3-17
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Technical specifications of the SM 321; DI 32 x 120 VAC
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
40 x 125 x 117
Weight Approx. 300 g
Data for Specific Module
Supports clocked
operation
No
Number of inputs 32
Length of cable
• Unshielded
• Shielded
max. 600 m
max. 1000 m
Voltages, Currents, Potentials
Number of inputs that can be
triggered simultaneously
• Horizontal configuration
Up to 40 C 32
Up to 60 C 24
• Vertical configuration
Up to 40 C 32
Isolation
• Between channels and
backplane bus
Yes
• Between the channels
Yes
In groups of 8
Permitted potential difference
• Between M
internal
and
the inputs
120 VAC
• Between the inputs of
the different groups
250 VAC
Insulation tested with 2500 VDC
Current consumption
• From the backplane bus
max. 16 mA
Power dissipation of the module typ. 4 W
Status, Interrupts, Diagnostics
Status display Green LED per channel
Interrupts None
Diagnostic functions None
Data for Selecting a Sensor
Input voltage
• Rated value
• For ‘‘1’’ signal
• For ‘‘0’’ signal
• Frequency range
120 VAC
74 to 132 V
0 to 20 V
47 to 63 Hz
Input current
• At ‘‘1’’ signal
typ. 21 mA
Input delay
• From ‘‘0’’ to ‘‘1’’
• From ‘‘1’’ to ‘‘0’’
max. 15 ms
max. 25 ms
Input characteristic curve According to
IEC 61131, type 2
Connection of Two-Wire
BEROs
• Permitted bias current
Possible
max. 4 A

Siemens SIMATIC S7-300 Module data Specifications

General

Series	S7-300
Manufacturer	Siemens
Protection Class	IP20
System	SIMATIC S7-300
Digital Inputs	Varies by module
Digital Outputs	Varies by module
Analog Inputs	Varies by module
Analog Outputs	Varies by module
Central Processing Unit	Varies by CPU model
Supply Voltage	24V DC or 120/230V AC
CPU Type	Varies (e.g., CPU 312, CPU 315, etc.)
Memory	Varies by CPU model
Communication Interfaces	MPI, PROFIBUS
Programming Languages	LAD, FBD, STL, SCL, GRAPH
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 70°C
Relative Humidity	10% to 95% (non-condensing)