Siemens SIMATIC S7-300 Module data Reference Manual

Digital Modules
3-25
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Technical specifications of the SM 321; DI 16 x 24 VDC
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
40 x 125 x 117
Weight Approx. 200 g
Data for Specific Module
Supports clocked
operation
Yes
Parameter changing during the
RUN is possible
Yes
• Behavior of the non para-
meterized inputs
gives the last valid
output value before the
parameterization
Number of inputs 16
Length of cable
• Unshielded
• Shielded
max. 600 m
max. 1000 m
Voltages, Currents, Potentials
Power rated voltage of the
electronics and encoder L+
24 VDC
• Reverse polarity protection Yes
Number of inputs that can be triggered simultaneously
• Horizontal configuration
Up to 60 C 16
• Vertical configuration
Up to 40 C 16
Isolation
• Between channels and
backplane bus
Yes
Permitted potential difference
• Between the different
circuits
75 VDC / 60 VAC
Insulation tested with 500 VDC
Current consumption
• From the backplane bus max. 130 mA
• From load voltage L +
(without sensor supply VS)
max. 90 mA
Power dissipation of the module typ. 4 W
Status, Interrupts, Diagnostics
Status display
• Inputs Green LED per channel
• Sensor power supplies (Vs) Green LED per output
Interrupts
• Hardware interrupt
• Diagnostic interrupt
Parameters can be
assigned
Parameters can be
assigned
Diagnostic functions Parameters can be
assigned
• Group error display Red LED (SF)
• Diagnostics information
read-out
Possible
Monitoring of
• Wire-break yes, at I < 1 mA
Sensor Power Supply Outputs
Number of outputs 2
Output voltage
• With load min. L+ (–2.5 V)
Output current
• Rated value
• Permitted range
120 mA
0 to 150 mA
Additional (redundant) supply Permitted
Short-circuit protection Yes, electronic
Data for Selecting a Sensor
Input voltage
• Rated value
• For signal “1”
• For signal “0”
24 VDC
13 to 30 V
*30 to + 5 V
Input current
• At signal “1” typ. 7 mA
Input characteristic curve According to
IEC 61131, type 2
Connection of Two-Wire
BEROs
• Permitted bias current
Possible
max. 2 mA
Resistive circuit of the sensor
for detecting broken wires
10 to 18 kOhm
Time/Frequency
Internal processing time for
status processing (in non
synchronous operation)
• Release of process and
diagnosis alarm
max. 40 s
Input delay
• Parameters can be
assigned
• Rated value
Yes
typ. 0.1/0.5/3/15/20 ms

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)