Siemens 6ES7331-7HF01-0AB0

SM 331 analog input, 8 AI, 14 bit, 52 µs per channel

Read from the product label

Maker: Siemens
Part no.: 6ES7331-7HF01-0AB0
Serial / rev.: as printed on your unit

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Siemens SIMATIC S7-300 SM 331 analog input module: 8 inputs for voltage and current, 14-bit resolution, 52 µs per channel, isochronous mode, 20-pole front connector.

Manufacturer: Siemens
Manufacturer part no.: 6ES7331-7HF01-0AB0
Product family: SIMATIC S7-300 PLC Modules
Type: Analog input module
Category: PLCs and I/O › Analogue I/O modules
Lifecycle: Discontinued
OEM successor: Not stated
Technical datasheet: Data sheet

Technical specifications

Manufacturer: Siemens
Manufacturer part no.: 6ES7331-7HF01-0AB0
Type: Analog input module
Application: Analog input module
Used with: SIMATIC S7-300 rack (S7-300 backplane bus)
Product function / Isochronous mode: Yes
Load voltage L+ / Rated value (DC): 24 V
Load voltage L+ / Reverse polarity protection: Yes
Input current / from load voltage L+ (without load), max.: 50 mA
Input current / from backplane bus 5 V DC, max.: 100 mA
Power loss, typ.: 1.5 W
Number of analog inputs: 8
Analog inputs / permissible input voltage for voltage input (destruction limit), max.: 20 V; 20 V DC permanent, 75 V DC for max. 1 s (duty factor 1:20)
Analog inputs / permissible input current for current input (destruction limit), max.: 40 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): 100 kΩ
Input ranges (rated values), voltages / -1 V to +1 V: Yes
Input ranges (rated values), voltages / -1 V to +1 V / Input resistance (-1 V to +1 V): 10 MΩ
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): 100 kΩ
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): 100 kΩ
Input ranges (rated values), voltages / -500 mV to +500 mV: Yes
Input ranges (rated values), voltages / -80 mV to +80 mV: Yes

Show all 61 specifications

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): 50 Ω
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): 50 Ω
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): 50 Ω
Cable length / shielded, max.: 200 m
Integration and conversion time/resolution per channel / Resolution with overrange (bit including sign), max.: 14 bit; Unipolar: 14 bit; bipolar: 13 bit + sign
Integration and conversion time/resolution per channel / Integration time, parameterizable: Yes
Integration and conversion time/resolution per channel / Basic conversion time (ms): 52 µs per channel
Integration and conversion time/resolution per channel / Interference voltage suppression for interference frequency f1 in Hz: none / 400 / 60 / 50 Hz
Connection of signal encoders / for current measurement as 2-wire transducer: Yes
Connection of signal encoders / for current measurement as 4-wire transducer: Yes
Operational error limit in overall temperature range / Voltage, relative to input range, (+/-): 0.4 %
Operational error limit in overall temperature range / Current, relative to input range, (+/-): 0.3 %
Basic error limit (operational limit at 25 °C) / Voltage, relative to input range, (+/-): 0.25 %
Basic error limit (operational limit at 25 °C) / Current, relative to input range, (+/-): 0.2 %
Interrupts/diagnostics/status information / Diagnostics function: Yes
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 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: 20-pin
Width: 40 mm
Height: 125 mm
Depth: 117 mm
Weight, approx.: 230 g

Technical documents (1)

Siemens data sheet 6ES7331-7HF01-0AB0

Key features

8 analog inputs: ±80 mV to ±10 V, 1 to 5 V, ±20 mA, 0/4 to 20 mA
14-bit resolution, 52 µs conversion per channel
Suitable for isochronous mode
Limit value alarm on channels 0 and 2; diagnostics
Discontinued by Siemens on 1 October 2025; spare part only

About the Siemens 6ES7331-7HF01-0AB0

The Siemens 6ES7331-7HF01-0AB0 is the high-speed SM 331: 14-bit resolution at 52 µs per channel and suitable for isochronous mode, where the 6ES7331-7KF02-0AB0 adds thermocouple and resistance ranges. Siemens's data sheet gives voltage ranges from ±80 mV to ±10 V and 1 to 5 V, current ranges of ±20 mA and 0/4 to 20 mA, limit value alarms on channels 0 and 2, and a 20-pin front connector. Siemens's data sheet marks it as a spare part.

What is the 6ES7331-7HF01-0AB0 used for?

It reads fast-changing analog signals into an S7-300 CPU, including in isochronous mode.

Lifecycle and successor

Discontinued.

Before you order

What to photograph or confirm so the right unit is quoted.

Check the order number on the module: 7HF01 is the fast 14-bit module; 7KF02 is the multi-range one.

Other parts in the Siemens SIMATIC S7-300 family

Listed for reference. They differ from the 6ES7331-7HF01-0AB0 in rating, supply, interface or function and are not interchangeable with it unless Siemens says so. Match the part number on your unit.

Product	Type	Lifecycle	Qty Available	Price	Action
Siemens 6ES7331-7KF02-0AB0SM 331 analog input, 8 AI, U/I/thermocouple/resistance	Analog input module	Discontinued	On Request	On request	View
Siemens 6ES7331-7KB02-0AB0SM 331 analog input, 2 AI, U/I/thermocouple/resistance	Analog module	Discontinued	On Request	On request	View
Siemens 6ES7331-1KF02-0AB0SM 331 analog input, 8 AI, 13 bit, U/I/resistance/Pt100/Ni	Analog module	Discontinued	On Request	On request	View
Siemens 6ES7331-7NF00-0AB0SM 331 analog input, 8 AI, 16 bit, U/I	Analog module	Discontinued	On Request	On request	View
Siemens 6ES7331-7PF01-0AB0SM 331 analog input, 8 AI, RTD, 16 bit	Analog module	Discontinued	On Request	On request	View
Siemens 6ES7332-5HD01-0AB0SM 332 analog output, 4 AO, voltage/current	Analog output module	Discontinued	On Request	On request	View
Siemens 6ES7334-0KE00-0AB0SM 334 analog module, 4 AI / 2 AO, 12 bit	Analog I/O module	Discontinued	On Request	On request	View
Siemens 6ES7331-7NF10-0AB0SM 331 analog input, 8 AI, 16 bit, U/I, 4-channel fast mode	Analog input module	Discontinued	On Request	On request	View
Siemens 6ES7331-7PF11-0AB0SM 331 analog input, 8 AI, thermocouples, 16 bit	Analog input module	Discontinued	On Request	On request	View
Siemens 6ES7332-5HB01-0AB0SM 332 analog output, 2 AO, voltage/current, 12 bit	Analog output module	Discontinued	On Request	On request	View
Siemens 6ES7332-7ND02-0AB0SM 332 analog output, 4 AO, 16 bit, isolated per channel	Analog output module	Discontinued	On Request	On request	View
Siemens 6ES7338-4BC01-0AB0SM 338 position input module, 3 SSI encoders	Position input module	Discontinued	On Request	On request	View

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