6ES7331-7NF00-0AB0
Siemens SM 331 analog input, 8 AI, 16 bit, U/I
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Delivery options
Siemens SIMATIC S7-300 SM 331 analog input module: 8 isolated inputs, ±5/10 V, 1-5 V, ±20 mA, 0/4-20 mA, 16-bit resolution, 40-pole front connector.
- Manufacturer
- Siemens
- Manufacturer part no.
- 6ES7331-7NF00-0AB0
- 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.
- 6ES7331-7NF00-0AB0
- Type
- Analog module
- Application
- Analog I/O module
- Used with
- SIMATIC S7-300 rack (S7-300 backplane bus)
- Product function / Isochronous mode
- No
- Input current / from backplane bus 5 V DC, max.
- 130 mA
- Power loss, typ.
- 0.6 W
- Number of analog inputs
- 8
- Analog inputs / permissible input voltage for voltage input (destruction limit), max.
- 50 V; Permanent
- Analog inputs / permissible input current for current input (destruction limit), max.
- 32 mA
- Input ranges / Voltage
- Yes
- Input ranges / Current
- Yes
- Input ranges / Thermocouple
- No
- Input ranges / Resistance thermometer
- No
- Input ranges / Resistance
- No
- Input ranges (rated values), voltages / 0 to +10 V
- No
- Input ranges (rated values), voltages / 1 V to 5 V
- Yes
- Input ranges (rated values), voltages / 1 V to 5 V / Input resistance (1 V to 5 V)
- 2 MΩ
- 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
- Yes
- Input ranges (rated values), voltages / -10 V to +10 V / Input resistance (-10 V to +10 V)
- 2 MΩ
- 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
- Yes
- Input ranges (rated values), voltages / -5 V to +5 V / Input resistance (-5 V to +5 V)
- 2 MΩ
- 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
- Yes
- Input ranges (rated values), currents / 0 to 20 mA / Input resistance (0 to 20 mA)
- 250 Ω
- Input ranges (rated values), currents / -10 mA to +10 mA
- No
- Input ranges (rated values), currents / -20 mA to +20 mA
- Yes
- Input ranges (rated values), currents / -20 mA to +20 mA / Input resistance (-20 mA to +20 mA)
- 250 Ω
- Input ranges (rated values), currents / -3.2 mA to +3.2 mA
- No
- Input ranges (rated values), currents / 4 mA to 20 mA
- Yes
- Input ranges (rated values), currents / 4 mA to 20 mA / Input resistance (4 mA to 20 mA)
- 250 Ω
- 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
- No
- Input ranges (rated values), resistance thermometer / Ni 100
- No
- Input ranges (rated values), resistance thermometer / Ni 1000
- No
- Input ranges (rated values), resistance thermometer / LG-Ni 1000
- No
- Input ranges (rated values), resistance thermometer / Ni 120
- No
- Input ranges (rated values), resistance thermometer / Ni 200
- No
- Input ranges (rated values), resistance thermometer / Ni 500
- No
- Input ranges (rated values), resistance thermometer / Pt 100
- No
- Input ranges (rated values), resistance thermometer / Pt 1000
- No
- Input ranges (rated values), resistance thermometer / Pt 200
- No
- Input ranges (rated values), resistance thermometer / Pt 500
- No
- Input ranges (rated values), resistors / 0 to 150 ohms
- No
- Input ranges (rated values), resistors / 0 to 300 ohms
- No
- Input ranges (rated values), resistors / 0 to 600 ohms
- No
- Input ranges (rated values), resistors / 0 to 6000 ohms
- No
- Cable length / shielded, max.
- 200 m
- Integration and conversion time/resolution per channel / Resolution with overrange (bit including sign), max.
- 16 bit; Unipolar: 15/15/15/15 bit; bipolar: 15 bit + sign/15 bit + sign/15 bit + sign/15 bit + sign
- Integration and conversion time/resolution per channel / Integration time, parameterizable
- Yes; 10/ 16.67/ 20/ 100 ms
- Integration and conversion time/resolution per channel / Interference voltage suppression for interference frequency f1 in Hz
- 400 / 60 / 50 / 10 Hz
- Connection of signal encoders / for voltage measurement
- Yes
- Connection of signal encoders / for current measurement as 2-wire transducer
- Yes; with external transmitter; possible with separate supply for transmitter
- Connection of signal encoders / for current measurement as 4-wire transducer
- Yes
- Operational error limit in overall temperature range / Voltage, relative to input range, (+/-)
- 0.1 %; At Ucm = 0 V or ±0.7 % at Ucm = 50 V
- Operational error limit in overall temperature range / Current, relative to input range, (+/-)
- 0.3 %; At Ucm = 0 V or ±0.9 % at Ucm = 50 V
- Basic error limit (operational limit at 25 °C) / Voltage, relative to input range, (+/-)
- 0.05 %
- Basic error limit (operational limit at 25 °C) / Current, relative to input range, (+/-)
- 0.05 %
- Interrupts/diagnostics/status information / Diagnostics function
- Yes; Parameterizable
- Alarms / Diagnostic alarm
- Yes; Parameterizable
- Alarms / Limit value alarm
- Yes; Parameterizable, channels 0 and 2
- Diagnoses / Diagnostic information readable
- Yes
- Diagnostics indication LED / Group error SF (red)
- Yes
- Potential separation analog inputs / between the channels
- No
- Potential separation analog inputs / between the channels, in groups of
- 2
- Potential separation analog inputs / between the channels and backplane bus
- Yes
- Isolation tested with
- 500 V DC
- required front connector
- 40-pin
- Width
- 40 mm
- Height
- 125 mm
- Depth
- 117 mm
- Weight, approx.
- 272 g
Technical documents (1)
Key features
- 8 analog inputs: ±5 V, ±10 V, 1-5 V, ±20 mA, 0-20 mA, 4-20 mA
- 16-bit resolution
- Integration time selectable: 10, 16.67, 20 or 100 ms
- Isolated; 40-pin front connector
- Discontinued by Siemens on 1 October 2025; spare part only
About the Siemens 6ES7331-7NF00-0AB0
The Siemens 6ES7331-7NF00-0AB0 is an eight-channel, 16-bit SM 331 analog input module for voltage and current. Siemens's data sheet lists ranges of ±5 V, ±10 V, 1-5 V, ±20 mA and 0/4-20 mA, integration times of 10, 16.67, 20 or 100 ms, 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 6ES7331-7NF00-0AB0 used for?
It measures standard process signals where higher resolution matters, such as flow, level and weight transmitters.
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 range on each input, so the replacement is set up the same way.
Alternatives for 6ES7331-7NF00-0AB0
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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