Siemens SIMATIC - Page 390

Analog modules
6.9 Analog input module SM 331; AI 8 x RTD; (6ES7331-7PF01-0AB0)
S7-300 Module data
390 Manual, 06/2017, A5E00105505-AJ
Parameters
Range of values
Default
Parameter
type
Scope
Measurement
• Measurement type
disabled
R-4L resistance
(4-wire connection)
R-3L resistance
(3-wire connection)
RTD-4L thermoresistor
(linear, 4-wire connection)
RTD-3L thermoresistor
(linear, 3-wire connection)
RTD-4L
dynamic Channel
group
• Measuring range
See chapter Measurement types and
measuring ranges (Page 387)
Pt 100 Klima
0.003850
(IPTS-68)
• Temperature unit
Degrees Centigrade; degrees Fahren-
heit
degrees Centi-
grade
dynamic
Module
• Mode of operation
8-channel mode (hardware filter)
8-channel mode (software filter)
4-channel mode (hardware filter)
8-channel
mode, hard-
ware filter
dynamic
Module
• Temperature coefficient for
temperature measurement with
thermoresistor (RTD)
Platinum (Pt)
0.003850 Ω/Ω/ °C (IPTS-68)
0.003916 Ω/Ω/ °C
0.003902 Ω/Ω/ °C
0.003920 Ω/Ω/ °C
0.003850 Ω/Ω/ °C (ITS-90)
0.003910 Ω/Ω/ °C
Nickel (Ni)
0.006170 Ω/Ω/ °C
0.006180 Ω/Ω/ °C
0.006720 Ω/Ω/ °C
0.005000 Ω/Ω/ °C (LG Ni 1000)
Copper (Cu)
0.004260 Ω/Ω/ °C
0.004270 Ω/Ω/ °C
0.004280 Ω/Ω/ °C
0,003850
dynamic Channel
group
• Noise suppression*
50/60/400 Hz; 400 Hz; 60 Hz; 50 Hz
50/60/400 Hz
dynamic
Channel
group
• Smoothing
none
weak
medium
strong
none
dynamic
Channel
group
* 50/60/400 Hz only programmable for 8-channel mode (hardware filter) and 4-channel mode (hardware filter);
50 Hz, 60 Hz or 400 Hz only programmable for 8-channel mode (software filter)
See also
Diagnostics messages of analog input modules (Page 296)