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

Siemens SB61 6DD1681-0EB3 connects 8 digital inputs with 24/48 VDC to 24 VDC conversion, per the official ST70 2021 catalogue. Confirm host configuration, wiring and current availability before ordering.

Manufacturer part number: 6DD1681-0EB3
Brand: Siemens
Category: PLC and HMI
Catalog status: Request a quotation

Technical specifications

Controller family: SIMATIC S7-400
Module function: SB61 interface module
Digital inputs: 8
Compatible module: FM458-1 DP
Input voltage: 24/48 VDC
Signal conversion: 24/48 VDC to 24 VDC
Compatibility scope: Verify host configuration, revision, wiring and protection requirements in the dedicated hardware manual
Document pages: ST400 2017: PDF 87; ST70 2021: PDF 1431 (11/5), 1443 (11/17), 1445 (11/19)
Current lifecycle status: Not established by historical 2017 and 2021 catalogues; confirm current lifecycle and supply separately

Manufacturer 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: 2026-10-22Official manufacturer source

This sheet provides a quick technical summary. For design, installation and final selection, review the latest official manufacturer documentation and verify the complete part number.