Product image is representative; revision or series may vary.
Contact us to request a specific version.

6ES7331-7KB02-0AB0 Siemens

Name: 6ES7331-7KB02-0AB0 Siemens
Brand: Siemens
SKU: 6ES7331-7KB02-0AB0
Price: 372.6 USD
Availability: InStock

$372.60 - $1,364.11

$372.60

$372.60 - $1,364.11

$372.60

Ships today if ordered by 1 PM CST

Overnight shipping available

Qty Available: (5) ✓ Verified Stock every 24hrs

Questions? (833) 800-7748

All products listed are sold by PLC Department, an independent supplier — not an authorized Siemens distributor. Covered by our 1-year warranty. By purchasing you acknowledge our full disclaimer. Read & agree ↓

Ships from Texas, USA

Same-day by 1 PM CST

Tested & inspected

Every unit, before it ships

1-year warranty

Backed direct by us

30-day returns

Hassle-free RMA

Stock verified / 24 hrs

Real-time availability

Photos on request

Your exact unit, ~5 min

Trusted By

Product Details

Description · Specifications · Product Overview

Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.

Product Overview

The Siemens SIMATIC S7-300 analog input module SM 331, part number 6ES7331-7KB02-0AB0, offers two isolated analog input channels with selectable resolution of 9-/12-/14-bits. It supports voltage, current, thermocouple, resistance thermometer, and resistance measurements, and provides alarm and diagnostic functions. It plugs into the S7-300 backplane and integrates into modular PLC systems. Typical industrial applications include process monitoring, temperature sensing, and analog signal acquisition in machinery or plant control environments.

Best Suited For

Small-scale analog signal acquisition within S7-300 racks
Temperature measurement via thermocouples or RTDs
General voltage/current looping sensor inputs
Upgrades or replacements in legacy S7-300 systems

Analog channels

2

Supported signal types

Voltage, Current, Thermocouple, RTD, Resistance

Supply voltage

24 V DC

Power dissipation

1 W (typical)

Technical Specifications

I/O & Electrical

Analog inputs

2 channels

Supported measurement types

Voltage, Current, Thermocouple, Resistance thermometer, Resistance

Input ranges, voltage

±10 V, ±5 V, ±2.5 V, ±1 V, ±250 mV, ±5 V, 1 V to 5 V

Input resistance (typ)

100 kΩ (1 V to 5 V, ±10 V, ±2.5 V, ±5 V), 10 MΩ (±1 V, ±250 mV)

Current input resistance

25 Ω (0-20 mA, ±10 mA)

Destruction limits

Voltage: 20 V continuous / 75 V for max. 1 s; Current: 40 mA

Communication & Power

Supply voltage

24 V DC

Reverse-polarity protection

Yes

Input current

30 mA from L+, 50 mA from 5 V backplane

Power dissipation (typ)

1 W

Physical & Environmental

Module mounting

Plug-in to S7-300 backplane (20-pole connector)

Weight

0.249 kg

1-Year Warranty

Every tested unit is backed by our free 1-year PLC Department warranty, direct from us.

Fast Shipping

Free ground shipping. Orders by 1 PM CST ship same-day, with overnight available.

USA Stock

Sourced and shipped from Texas, USA. Never anonymous overseas marketplace stock.

30-Day Returns

Hassle-free RMA. If the part is not right for your application, send it back within 30 days.

Reseller Options →

Resellers welcome. Reach out for volume pricing and we will get you set up.

Talk to a Real Person

Fast answers on stock, revisions, and shipping. (833) 800-7748 or live chat.

PLC Department customer reviews from maintenance and engineering teams

Trusted by 1000s of teams who keep plants running

From maintenance managers and controls engineers to Fortune 500 manufacturers, teams across America count on PLC Department. Years of customer care, every unit bench-tested before it ships, and real people on the phone when a line is down. Our job is simple: get you back up and running, fast.

Read customer reviews →

We're here to support your business
Call, email, or chat anytime

(833) 800-7748

Live chat support

contact@plcdepartment.com

Rockwell Automation documentation

Access official manuals, datasheets, and lifecycle information for this part directly from Rockwell Automation.

Visit RockwellAutomation.com →

Must Read: Disclaimer

PLC Department sells surplus and refurbished industrial automation products, including but not limited to programmable logic controllers (PLCs), which are sourced exclusively through independent third-party channels. PLC Department is not an authorized distributor, reseller, or representative of any manufacturer listed on this website, including Rockwell Automation or its Allen-Bradley brand. All product warranties, where offered, are provided solely by PLC Department and not by the original manufacturer.

Any reference to manufacturer names, logos, trademarks, or product identifiers is for identification and compatibility purposes only. All such trademarks and brand names are the property of their respective owners, and this website is not affiliated with, endorsed by, or approved by any manufacturer referenced herein.

The products offered for sale may be used or surplus and may contain older date codes, be of earlier series or versions, or differ in appearance or features compared to products available through factory-authorized distribution channels. The presence, version, or functionality of firmware, if any, on programmable devices such as Allen-Bradley PLCs is not guaranteed. PLC Department makes no representation or warranty regarding:

PLC Department does not obtain or supply firmware on behalf of customers. It is solely the customer's responsibility to ensure legal and compliant use of any firmware or software associated with products purchased through this site, including compliance with any applicable license agreements or manufacturer policies.

Products listed on this site may vary in country of origin, packaging, language, accessories, and included materials. Any quality control, testing, certification, or warranty previously associated with the manufacturer does not apply unless explicitly stated by PLC Department.

By purchasing through this website, you acknowledge and agree to these terms.