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Siemens 6ES7331-7KB01-0AB0 — Analog Input Modules

Siemens 6ES7331-7KB01-0AB0 S7-300 Analog Input, EOL

MPN6ES7331-7KB01-0AB0
End of Life

Siemens SIMATIC S7-300, SM 331 analog input module 6ES7331-7KB01-0AB0, 2 AI, optically isolated, 9/12/14 bit resolution, U/I/TC/RTD, interrupts, diagnostics, 20-pin, hot-swap.

$223.95 – $295.00Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

6ES7331-7KB01-0AB0 specifications
ParameterValue
Shipping weight1.3 Kg
Standard lead time ex-worksOn request
Siemens6ES7331-7KB01-0AB0 (has been upgraded to 6ES7331-7KB02-0AB0)
Successor6ES7331-7KB02-0AB0
ManufacturerSiemens
Quantity unit0 Piece
PLM effective dateEnd of product lifecycle since: 01.10.2004
Packaging quantity1
Estimated lead timeUsually ships in 1 - 10 working days.
Product descriptionSIMATIC S7-300, ANALOG INPUT SM 331, OPTICALLY ISOLATED, 2 AI, 9/12/14 BITS RESOLUTION, U/I/THERMOCOUPLE/RESISTANCE, INTERRUPT, DIAGNOSTICS, 20 PIN, REMOVE/INSERT W. BACKPLANE BUS
Successor descriptionSIMATIC S7-300, ANALOG INPUT SM 331, OPTICALLY ISOLATED, 2 AI, 9/12/14 BITS RESOLUTION, U/I/THERMOCOUPLE/RESISTANCE, ALERT, DIAGNOSTICS, 1 X 20 PIN, REMOVE/INSERT W. BACKPLANE BUS
Export control regulationsECCN : EAR99H / AL : N
Obligation category for taking back electrical and electronic equipment after useNo obligation to take back electrical and electronic equipment after use

Product details

This is the Siemens SIMATIC S7-300 SM 331 analog input module, order code 6ES7331-7KB01-0AB0. It provides two analog inputs with optical isolation, configurable resolution from 9 to 14 bits. Accepts voltage, current, thermocouple, and resistance signals. Supports interrupts and diagnostics, and connects via a 20-pin front connector with hot-swap capability on the backplane bus.

Mounts in any S7-300 rack, occupies one slot. The 20-pin front connector is wired per standard SM 331 pinout. Hot-swap feature allows module replacement while bus is powered, but all field circuits must be de-energized. No hardware rewiring is needed when swapping to the successor 6ES7331-7KB02-0AB0; same mechanical and electrical interface.

Frequently asked questions

What is the official successor?

The successor is 6ES7331-7KB02-0AB0. It has the same inputs and physical dimensions, with the main change being 'ALERT' instead of 'INTERRUPT'.

How can I source the 6ES7331-7KB01-0AB0 today?

Since it's obsolete, sourcing is via surplus or broker channels. Submit an RFQ for a quoted lead time and availability.

Will the 6ES7331-7KB01-0AB0 fit a panel wired for the successor?

Yes, it is mechanically and electrically interchangeable with the successor 6ES7331-7KB02-0AB0. No rewiring needed.

MPN
6ES7331-7KB01-0AB0