Siemens Simatic S7-300 - Page 334

Analog Modules
4-128
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Module filtering mode 4 channels, hardware
Integration/conversion time/
resolution (per channel)
• Programmable Yes
• Basic conversion time in
ms
3.3
• Additional conversion time
for measuring resistance,
in ms
185*
• Additional conversion time
for open-circuit monitoring,
in ms
85**
• 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
Basic response time of module
(all channels enabled)
10 ms
Suppression of interference, Limits of Error
Noise suppression for f = n (f1 1%),
”(f1 = interference frequency) n = 1.2, etc.
• Common-mode
interference
(U
CM <
60 VAC)
> 100 dB
• Series-mode interference
(peak value of interference
< rated value of input
range)
> 90 dB
Crosstalk between the inputs
> 100 dB
Operational limit (over entire temperature range, referred
to 0 to 60 C input range)
• Resistance thermometer "1.0 °C
• Resistors "0.1 %
Basic error (operational limit at 25°C, referred to input
range)
• Resistance thermometer "0.5 °C
• Resistors "0.05 %
Temperature error (with
reference to the input range)
"0.005 %/K
Linearity error (with reference to
the input range)
"0.02 %
Repeat accuracy (in the steady
state at 25 °C, referred to the
input range)
"0.01 %
Status, Interrupts, Diagnostics
Interrupts
• Hardware interrupt Programmable
(channels 0 – 7)
• Diagnostic interrupt Programmable
Diagnostic functions Programmable
• Group error display Red LED (SF)
• Diagnostic information can
be displayed
Possible
Data for Selecting a Sensor
Input range (rated values) input
resistance
• Resistance thermometer Pt 100, Pt 200, Pt 500,
Pt 1000, Ni 100, Ni
120, Ni 200, Ni 500, Ni
1000, Cu 10
• Resistors 150, 300, 600 
Maximum input voltage for
voltage input (destruction limit)
35 VDC continuous;
75 VDC for max. 1 s
(duty factor 1:20)
Connection of the sensor
• For measuring resistance
With two-conductor
connection
Possible (without
resistance correction)
With three-conductor
connection
Possible
With four-conductor
connection
Possible
Characteristic linearization
• Resistance thermometer Pt 100, Pt 200, Pt 500,
Pt 1000, Ni 100, Ni
120, Ni 200, Ni 500, Ni
1000, Cu 10 (standard
and climatic range)
• Technical unit for
temperature measurement
Degrees Celsius;
degrees Fahrenheit
* The resistance measurement for a three-conductor connection is performed every 5 minutes.
** Open-circuit monitoring in module filtering mode 4 Channels, Hardware is performed every 3 seconds.