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6ES7551-1AB00-0AB0

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Siemens 6ES7551-1AB00-0AB0 TM PosInput 2 counter and position-detection module for RS-422 or SSI encoders.
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Technical specifications for 6ES7551-1AB00-0AB0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7551-1AB00-0AB0
  • Product Family:
    Siemens Simatic S7-1500
  • Product Type:
    Technology Module
  • Stock:
    1
  • Encoder Types:
    RS-422 incremental or SSI absolute
  • Channels:
    2
  • Channel I/O:
    2 DI and 2 DQ per channel
  • Weight:
    0.443 kg
  • Estimated shipping dimensions:
    16.10 x 19.40 x 5.00 cm
  • Tariff Code:
    85389091
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Encoder Matching Position Capture PosInput Migration

Features:

•Two channels for counting and position detection
•RS-422 incremental encoder or SSI absolute encoder support
•Two digital inputs and two digital outputs per channel

The Siemens 6ES7551-1AB00-0AB0 is the original TM PosInput 2 article for two-channel encoder acquisition in SIMATIC S7-1500 applications.

Engineering review should identify the encoder type on each channel, the associated digital points, project integration, and wiring that must be retained.

Siemens identifies 6ES7551-1AB01-0AB0 as the successor. Compatibility and recommissioning requirements must be verified before migration.

Availability is subject to Apter Power's current inventory and sourcing confirmation.

Siemens 6ES7551-1AB00-0AB0 SIMATIC S7-1500 TM PosInput 2 Specs

General

ManufacturerSiemens
Model6ES7551-1AB00-0AB0
ConditionNew and factory sealed
Product FamilySIMATIC S7-1500 TM PosInput 2

Encoder Matching

•Incremental input: The module supports compatible RS-422 incremental encoders.
•Absolute input: SSI absolute encoders are included in the official configuration.
•Channels: Two position-input channels are provided.
•Project review: Match encoder selection and wiring to the approved hardware project.

Position Capture

•Application: Use TM PosInput 2 for engineered counting and position-detection tasks.
•Channel I/O: Each channel includes two digital inputs and two digital outputs.
•Reference data: Preserve application-specific position and channel settings before replacement.
•Diagnostics: Verify encoder signals and controller diagnostics during commissioning.

PosInput Migration

•OEM status: Siemens lists 6ES7551-1AB00-0AB0 as no longer available.
•Successor: Siemens identifies 6ES7551-1AB01-0AB0 as the successor.
•Encoder review: Compare encoder support, wiring, and channel use before migration.
•Acceptance: Validate position acquisition and diagnostics in the installed project.
Description
6ES7551-1AB00-0AB0 is the Siemens SIMATIC S7-1500 TM PosInput 2 module for counting and position detection. It supports RS-422 incremental encoders or SSI absolute encoders across two channels, with two digital inputs and two digital outputs per channel.

6ES7551-1AB00-0AB0 must be matched to the installed encoder technology, channel wiring, project configuration, and position-acquisition requirements. Confirm whether each channel uses an incremental or SSI encoder before commissioning.

6ES7551-1AB00-0AB0 is identified by Siemens as no longer available, with 6ES7551-1AB01-0AB0 listed as the successor. Review the hardware project and encoder application before approving a replacement.
Alternative Names
6ES7551-1AB00-0AB0 6ES75511AB000AB0 6ES7551 1AB00 0AB0 6ES7 551-1AB00-0AB0 Siemens 6ES7551-1AB00-0AB0 SIMATIC 6ES7551-1AB00-0AB0 TM PosInput 2 S7-1500 position input module
Technical notes
Siemens 6ES7551-1AB00-0AB0 is the two-channel TM PosInput 2 for RS-422 incremental or SSI absolute encoders. Verify encoder type, channel wiring, and project compatibility before ordering.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
How should an engineer verify the encoder match for 6ES7551-1AB00-0AB0?
Confirm whether each installed channel uses an RS-422 incremental encoder or SSI absolute encoder, then compare wiring and project configuration with the module record.
What details help Apter Power quote 6ES7551-1AB00-0AB0 accurately?
Provide quantity, destination, required condition, encoder types, channel use, project revision, label photos, and whether the original article must be retained.
Why might 6ES7551-1AB00-0AB0 report incorrect position values after installation?
Check encoder type selection, wiring and shielding, channel assignment, project parameters, reference data, field-device condition, and controller diagnostics.
What should be preserved before removing a failed 6ES7551-1AB00-0AB0?
Preserve the approved project, encoder configuration, channel wiring, scaling or reference settings, diagnostic records, and connection photos.
Can a successor be approved for 6ES7551-1AB00-0AB0 using only the article number?
No. Engineering approval should also compare encoder support, hardware integration, project requirements, wiring, firmware behavior, and commissioning tests.
When is an original 6ES7551-1AB00-0AB0 spare preferable?
It may be preferable when the validated project or plant change-control process requires a like-for-like module pending an approved encoder-system migration.
Which records distinguish a usable 6ES7551-1AB00-0AB0 PosInput spare?
Confirm the full label, two-channel TM PosInput 2 identity, encoder-interface requirement, condition photos, traceability, and packing details.
What should a 6ES7551-1AB00-0AB0 migration comparison cover?
Compare the successor article with the installed encoder types, channel I/O, wiring, hardware project, position logic, and site acceptance procedure.

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