Skip to content
Free Ground Shipping | Overnight Shipping Available | Texas-based company, and all shipments come from the USA
(833) 800-7748
6DD1681-0FG0 Siemens
Product image is representative; revision or series may vary.
Contact us to request a specific version.

6DD1681-0FG0 Siemens

$0.00 - $330.00
$330.00
$0.00 - $330.00
$330.00
Surplus - Tested (With Warranty)
Need a Specific Revision?
$330.00
9 in stock
New / Open-Box Surplus
Get Pricing ~5 mins
Ships today if ordered by 1 PM CST
Overnight shipping available
Qty Available: (9) ✓ 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 TDC Interface Module SU13 (article 6DD1681-0FG0 is a variant of the SU13 series) performs 1:1 wiring for signal interfacing within the S7-400 TDC (Time Domain Converter) environment. It connects field-level wiring to the TDC control system. Typically deployed in factory automation control racks, signal centralization or expansion, and on-machine interface applications. 6DD1681-0FG0 is a wiring interface variant in the SU13 family.

Best Suited For

  • S7-400 TDC system I/O extension
  • On-machine signal interfacing
  • Signal consolidation in control racks
  • Application in hazardous-area variants (specific suffix options)
Terminals
50
Wiring style
1:1 connection
Interface module family
SU13 (TDC)
Product phase-out date
Since 01 October 2023
Certifications
ATEX, EMC, RoHS (varies by suffix)

Technical Specifications

Physical & Environmental

Dimensions (W × H × D)
45 × 130 × 156 mm
Weight
approx. 0.3 kg

Certifications

ATEXEMCRoHS

Variants of 6DD1681-0FG0 belong to the SIMATIC TDC interface modules SU13 with standard compliance per ATEX, EMC, RoHS depending on exact suffix. Phase-out announced as of 1 October 2023.

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.

Review our full Disclaimer here:

https://www.plcdepartment.com/pages/disclaimer

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