6ES7331-7PF01-0AB0
Siemens SM 331 analog input, 8 AI, RTD, 16 bit
Image is for illustrative purposes only. Please refer to product description.
Delivery options
Siemens SIMATIC S7-300 SM 331 analog input module: 8 isolated inputs for resistance thermometers (Pt100/200/1000, Ni100 to Ni1000, Cu10) and resistance, 2/3/4-wire, 16 bit, 40-pole front connector.
- Manufacturer
- Siemens
- Manufacturer part no.
- 6ES7331-7PF01-0AB0
- Product family
- SIMATIC S7-300 PLC Modules
- Type
- Analog module
- Lifecycle
- Discontinued: product cancellation (Siemens SiePortal), spare part only
- OEM successor
- Not stated
- Technical datasheet
- Data sheet
Technical specifications
- Manufacturer
- Siemens
- Manufacturer part no.
- 6ES7331-7PF01-0AB0
- Type
- Analog module
- Application
- Analog I/O module
- Used with
- SIMATIC S7-300 rack (S7-300 backplane bus)
- Product function / Isochronous mode
- No
- Load voltage L+ / Rated value (DC)
- 24 V
- Load voltage L+ / Reverse polarity protection
- Yes
- Input current / from load voltage L+ (without load), max.
- 240 mA
- Input current / from backplane bus 5 V DC, max.
- 100 mA
- Power loss, typ.
- 4.6 W
- Number of analog inputs
- 8
- Number of analog inputs / For resistance measurement
- 8
- Analog inputs / permissible input voltage for voltage input (destruction limit), max.
- 75 V; 35 V continuous, 75 V for max. 1 s (mark to space ratio 1:20)
- Input ranges / Voltage
- No
- Input ranges / Current
- No
- Input ranges / Thermocouple
- No
- Input ranges / Resistance thermometer
- Yes
- Input ranges / Resistance
- Yes
- Input ranges (rated values), voltages / 0 to +10 V
- No
- Input ranges (rated values), voltages / 1 V to 5 V
- No
- Input ranges (rated values), voltages / 1 V to 10 V
- No
- Input ranges (rated values), voltages / -1 V to +1 V
- No
- Input ranges (rated values), voltages / -10 V to +10 V
- No
- Input ranges (rated values), voltages / -2.5 V to +2.5 V
- No
- Input ranges (rated values), voltages / -250 mV to +250 mV
- No
- Input ranges (rated values), voltages / -5 V to +5 V
- No
- Input ranges (rated values), voltages / -50 mV to +50 mV
- No
- Input ranges (rated values), voltages / -500 mV to +500 mV
- No
- Input ranges (rated values), voltages / -80 mV to +80 mV
- No
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- Input ranges (rated values), currents / 0 to 20 mA
- No
- Input ranges (rated values), currents / -10 mA to +10 mA
- No
- Input ranges (rated values), currents / -20 mA to +20 mA
- No
- Input ranges (rated values), currents / -3.2 mA to +3.2 mA
- No
- Input ranges (rated values), currents / 4 mA to 20 mA
- No
- Input ranges (rated values), thermocouples / Type B
- No
- Input ranges (rated values), thermocouples / Type C
- No
- Input ranges (rated values), thermocouples / Type E
- No
- Input ranges (rated values), thermocouples / Type J
- No
- Input ranges (rated values), thermocouples / Type K
- No
- Input ranges (rated values), thermocouples / Type L
- No
- Input ranges (rated values), thermocouples / Type N
- No
- Input ranges (rated values), thermocouples / Type R
- No
- Input ranges (rated values), thermocouples / Type S
- No
- Input ranges (rated values), thermocouples / Type T
- No
- Input ranges (rated values), thermocouples / Type U
- No
- Input ranges (rated values), thermocouples / Type TXK/TXK(L) to GOST
- No
- Input ranges (rated values), resistance thermometer / Cu 10
- Yes
- Input ranges (rated values), resistance thermometer / Ni 100
- Yes
- Input ranges (rated values), resistance thermometer / Ni 1000
- Yes
- Input ranges (rated values), resistance thermometer / LG-Ni 1000
- Yes
- Input ranges (rated values), resistance thermometer / Ni 120
- Yes
- Input ranges (rated values), resistance thermometer / Ni 200
- Yes
- Input ranges (rated values), resistance thermometer / Ni 500
- Yes
- Input ranges (rated values), resistance thermometer / Pt 100
- Yes
- Input ranges (rated values), resistance thermometer / Pt 1000
- Yes
- Input ranges (rated values), resistance thermometer / Pt 200
- Yes
- Input ranges (rated values), resistance thermometer / Pt 500
- Yes
- Input ranges (rated values), resistors / 0 to 150 ohms
- Yes
- Input ranges (rated values), resistors / 0 to 300 ohms
- Yes
- Input ranges (rated values), resistors / 0 to 600 ohms
- Yes
- Characteristic linearization / Parameterizable
- Yes
- Characteristic linearization / Parameterizable / for resistance thermometer
- Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni200, Ni500, Ni1000, Cu10; (standard/climate)
- Cable length / shielded, max.
- 200 m
- Integration and conversion time/resolution per channel / Resolution with overrange (bit including sign), max.
- 16 bit; Two's complement
- Integration and conversion time/resolution per channel / Integration time, parameterizable
- Yes
- Integration and conversion time/resolution per channel / Basic conversion time (ms)
- up to 4 channels: 10 ms per module, over 5 channels: 190 ms per module, 8 channels: 80 ms
- Integration and conversion time/resolution per channel / Interference voltage suppression for interference frequency f1 in Hz
- 400 / 60 / 50 Hz
- Connection of signal encoders / for resistance measurement with two-wire connection
- Yes; without resistance correction
- Connection of signal encoders / for resistance measurement with three-wire connection
- Yes
- Connection of signal encoders / for resistance measurement with four-wire connection
- Yes
- Operational error limit in overall temperature range / Resistance, relative to input range, (+/-)
- 0.1 %
- Operational error limit in overall temperature range / Resistance thermometer, relative to input range, (+/-)
- ±1 K
- Basic error limit (operational limit at 25 °C) / Resistance, relative to input range, (+/-)
- 0.05 %
- Basic error limit (operational limit at 25 °C) / Resistance thermometer, relative to input range, (+/-)
- ±0.5 K
- Interrupts/diagnostics/status information / Diagnostics function
- Yes; Parameterizable
- Alarms / Diagnostic alarm
- Yes; Parameterizable per group
- Alarms / Limit value alarm
- Yes; Parameterizable
- Alarms / Hardware interrupt
- Yes; Parameterizable, channels 0 to 7
- Diagnoses / Diagnostic information readable
- Yes
- Diagnostics indication LED / Group error SF (red)
- Yes
- Potential separation analog inputs / between the channels
- Yes
- Potential separation analog inputs / between the channels, in groups of
- 2
- Potential separation analog inputs / between the channels and backplane bus
- Yes
- Potential separation analog inputs / between the channels and the power supply of the electronics
- Yes
- Isolation tested with
- 500 V DC
- required front connector
- 40-pin
- Width
- 40 mm
- Height
- 125 mm
- Depth
- 120 mm
- Weight, approx.
- 272 g
Technical documents (1)
Key features
- 8 inputs for resistance thermometers and resistance
- Pt100/200/1000, Ni100/120/200/500/1000, Cu10
- 2-, 3- or 4-wire connection
- 16-bit resolution
- Isolated; 40-pin front connector
- Discontinued by Siemens on 1 October 2025; spare part only
About the Siemens 6ES7331-7PF01-0AB0
The Siemens 6ES7331-7PF01-0AB0 is an eight-channel SM 331 module for resistance thermometers and resistance. Siemens describes it for Pt100/200/1000, Ni100/120/200/500/1000 and Cu10 sensors in 2-, 3- or 4-wire connection, with 16-bit resolution and a 40-pin front connector. Siemens's data sheet marks it as a spare part. Siemens names no direct successor for the order number; its route forward is migration to the S7-1500 with ET 200MP.
What is the 6ES7331-7PF01-0AB0 used for?
It measures temperatures from RTD sensors in process plant, ovens and HVAC, eight channels per module.
Lifecycle and successor
Discontinued: product cancellation (Siemens SiePortal), spare part only.
Before you order
What to photograph or confirm so the right unit is quoted.
Check the order number on the module and note the sensor type and wiring (2-, 3- or 4-wire) on each input.
Alternatives for 6ES7331-7PF01-0AB0
The manufacturer’s named successor and other parts in the same family. None is a drop-in replacement without checking wiring, I/O and configuration for your installation.
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