Industrial automation technical reference
ARAN VISIONفارسی
Siemens6ES7421-1BL01-0AA0

SIMATIC S7-400 SM421 32-input digital module / 6ES7421-1BL01-0AA0

Siemens6ES7421-1BL01-0AA0Product image is not available.

Verify the part number and specifications; the image alone does not establish suitability.

ARAN VISION reference
AV-REF-Siemens-6ES7421-1BL01-0AA0
Category
PLC and HMI
Manufacturer sourcing lead time
Manufacturer confirmation required

Delivery to your location is confirmed separately.

Documents / datasheets
ARAN VISION specification sheet

Technical specifications

Controller family
SIMATIC S7-400
Module designation
SM421
Width (mm)
25
Height (mm)
290
Depth (mm)
210
Approximate weight (g)
500
Discrete inputs
32
Rated input
24 V DC
Input signal 0
-30..5 V DC
Input signal 1
13..30 V DC
Typical input current (mA)
7
Channels per isolation group
32
Isolation from backplane
Yes
Document pages
PDF 54, 55, 56
Reviewed document edition
ST 400 / May 2017 / E86060-K4678-A151-A1-7600
Report a product-data issue

Documents / datasheets

Manufacturer technical catalog · ST 400 / May 2017 / E86060-K4678-A151-A1-7600 · en · PDF · ST 400 / May 2017 / E86060-K4678-A151-A1-7600Manufacturer source: Siemens · Model explicitly covered in family document · Covered models: 6ES7421-1BL01-0AA0 · Checked: 2026-10-17View / print the ARAN VISION specification sheetOfficial manufacturer source · Siemens

Source reviewed: 2026-10-17

Description

SIMATIC S7-400 SM421 32-input digital module; specifications are qualified to the May 2017 official catalogue. Verify current lifecycle, supplied revision and project configuration when requesting a quote.

Ask about this product

Send the part number and your question for technical or sourcing review.

Condition and order verification

Authenticity and condition

Product authenticity and actual condition, including new condition when offered as new, are checked before final approval and recorded in the quotation.

Matching technical version

The part number, revision, firmware or version is checked against your requirements. Apparently similar products may differ in price because of their version or condition.

Delivery estimate before ordering

Specialist products have a lead time. The valid delivery estimate is stated in the quotation after checking availability and specifications.

Products in the same technical family

Category similarity does not establish compatibility or replacement suitability.

Siemens
6DD1681-0EB3

Siemens SB61 8 digital input interface for FM458-1 DP, 24/48 VDC / 6DD1681-0EB3

Voltage - Input: 24/48 VDCSignal conversion: 24/48 VDC to 24 VDC

Technical specificationsManufacturer technical catalog · Siemens ST400 May 2017; exact technical/ordering row, PDF 87 · en · PDF · May 2017Manufacturer source: Siemens · Model explicitly covered in family document · Covered models: 6DD1681-0EB3 · Checked: 2026-10-22Manufacturer technical catalog · Siemens ST70 2021; SB61 exact ordering row PDF 1431 (11/5), overview PDF 1443 (11/17), ordering PDF 1445 (11/19) · en · PDF · ST70 2021Manufacturer source: Siemens · Model explicitly covered in family document · Covered models: 6DD1681-0EB3 · Checked: 2026-10-22