Siemens SIMATIC S7-300 Module data Reference Manual

Analog Modules
4-127
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Technical specifications of the SM 331; AI 8 x RTD
Dimensions and Weight
Dimensions W x H x D
(in millimeters)
40 x 125 x 117
Weight Approx. 272 g
Data for Specific Module
Supports clocked
operation
No
Number of inputs 8
Length of cable
• Shielded max. 200 m
Voltages, Currents, Potentials
Power rated voltage of the
electronics L+
24 VDC
• Reverse polarity protection Yes
Constant measured current for
resistance-type sensor
max. 5 mA
Isolation
• Between channels and
backplane bus
Yes
• Between channels and
power supply of the
electronics
Yes
• Between the channels
In groups of
Yes
2
Permitted potential difference
• Between the inputs (U
CM
) 75 VDC / 60 VAC
• Between M
ANA
and
M
internal
(U
ISO
)
75 VDC / 60 VAC
Insulation tested with 500 VDC
Current consumption
• From the backplane bus
• From the power supply L+
max. 100 mA
max. 240 mA
Power dissipation of the module typ. 4.6 W
Analog value generation
Measuring principle Integrating
Module filtering mode 8 channels, hardware
Integration/conversion time/
resolution (per channel)
• Programmable Yes
• Basic conversion time in
ms
80
• Additional conversion time
for measuring resistance,
in ms
185*
• Additional conversion time
for open-circuit monitoring,
in ms
100
• Resolution including sign 16 bits
• Noise suppression
for interference frequency
f1 in Hz
400 / 60 / 50
Smoothing of the measured
values
None / low/
average/ high
Conversion time (per channel) 100 ms
Basic response time of module
(all channels enabled)
200 ms
Module filtering mode 8 channels, software
Integration/conversion time/
resolution (per channel)
• Programmable Yes
• Basic conversion time in
ms
8 / 25 / 30
• Additional conversion time
for measuring resistance,
in ms
45 / 79 / 89*
• Additional conversion time
for open-circuit monitoring,
in ms
20 / 37 / 42
• Resolution including sign 16 bits
• Noise suppres
sion for interference
frequency f1 in Hz
400 / 60 / 50
Smoothing of the measured
values
None / low/
average/ high
Conversion time (per channel) 20 / 37 / 42 ms
Basic response time of module
(all channels enabled)
40 / 79 / 84 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)