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Siemens SIMATIC TOP connect 6ES7921-5CK20-0AA0 S7-1500 Analog Front Connector Module | Original New

Siemens SIMATIC TOP connect 6ES7921-5CK20-0AA0 S7-1500 Analog Front Connector Module | Original New

SIEMENS · SIMATIC TOP CONNECT

6ES7921-5CK20-0AA0

S7-1500 analog front connector module with one 50-pole IDC connection

INTERFACE 1 × 50-pole IDC	MODULE SIDE 40-pole front connector
LEAD TIME In stock	WARRANTY 1 year

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Appurtenance:

Overview
Technical Data
Inquiry
Applications
Construction
Installation
Compatibility
FAQ
Recommend Models
Recommended Products

PRODUCT OVERVIEW

6ES7921-5CK20-0AA0

S7-1500 analog front connector module with one 50-pole IDC connection

Product Overview 1

6ES7921-5CK20-0AA0 is a SIMATIC TOP connect fully modular front connector module intended for analog 40-pole I/O modules in the SIMATIC S7-1500 system.

Product Overview 2

The module converts the S7-1500 front connection to one 50-pole insulation-displacement interface and supports potential supply through an infeed element.

Product Overview 3

A maximum connecting-cable length of 30 m supports orderly control-cabinet wiring between the I/O module and the terminal module.

Technical Data

TECHNICAL DATA

6ES7921-5CK20-0AA0

S7-1500 analog front connector module with one 50-pole IDC connection

Complete model	6ES7921-5CK20-0AA0
Product family	SIMATIC TOP connect for SIMATIC S7-1500
Product type	Fully modular analog front connector module
Target system	SIMATIC S7-1500
Suitable I/O type	Analog 40-pole I/O modules
Dimensions	See Siemens TOP connect dimensional drawing for this exact model, manual p. 79
Weight	0.099 kg
Rated voltage	24 V DC
Maximum voltage	60 V
Continuous current	Maximum 1 A per plug-in contact
Module-side connector	40 poles
Cable-side interface	One 50-pole IDC plug contact
Connection method	Plug-in connection
Maximum cable length	30 m between front connector and terminal module
Mounting	Direct mounting
Overvoltage category	Category 2
Pollution degree	Degree 2
Operating temperature	0 to 60 °C
Storage temperature	-40 to +70 °C
Housing	Black, nontransparent
Approval	cULus

Inquiry

CONTACT

STELLA

Direct product inquiry

Email Inquiry [email protected]

WhatsApp +86 18159889985

Applications

APPLICATIONS

6ES7921-5CK20-0AA0

Official product-specific information

Control-cabinet wiring

Provides a structured transition from a 40-pole S7-1500 analog I/O front connector to a 50-pole IDC cable interface.

Analog signal modules

Designed for compatible SIMATIC S7-1500 analog input and analog output modules documented by Siemens.

Modular connection

Supports the SIMATIC TOP connect fully modular wiring concept for repeatable cabinet assembly.

Maintenance access

The plug-in architecture enables organized disconnection and replacement during scheduled service.

Construction

CONSTRUCTION

6ES7921-5CK20-0AA0

Official product-specific information

Front connector

The module-side interface uses a 40-pole front connector matched to the S7-1500 analog-module format.

IDC interface

One 50-pole insulation-displacement plug contact provides the cable-side connection.

Potential supply

Potential can be supplied through the designated TOP connect infeed element.

Enclosure

The nontransparent black housing is supplied without a requirement for an additional end cover.

Installation

INSTALLATION

6ES7921-5CK20-0AA0

Official product-specific information

Direct mounting

Install the module directly in the intended S7-1500 connection arrangement and observe the Siemens dimensional drawing.

Cable selection

Use the compatible Siemens preassembled connecting cable and verify the 50-pole IDC termination.

Length limit

Keep the connection between the front connector and terminal module within the specified 30 m maximum.

Electrical checks

Confirm 24 V DC service, maximum 60 V, and no more than 1 A per plug-in contact before energizing.

Compatibility

COMPATIBILITY

6ES7921-5CK20-0AA0

Official product-specific information

Supported platform

For the SIMATIC S7-1500 system and analog 40-pole I/O modules.

Documented examples

Siemens documents use with analog modules including AI 8xU/I/RTD/TC ST, AI 8xU/I HS, AQ 4xU/I ST and AQ 8xU/I ST variants.

Interface matching

The compatible cable and terminal module must provide the corresponding 50-pole IDC connection.

Environmental scope

Use within the specified 0 to 60 °C operating range and pollution degree 2 environment.

FAQ

6ES7921-5CK20-0AA0

Product verification and procurement guidance

Q1. How can the quoted item be verified as the exact model?

Check that the nameplate, packing label and quotation all state 6ES7921-5CK20-0AA0. Also verify the 40-pole S7-1500 module side and the single 50-pole IDC cable interface.

Q2. How can New, Used or Refurbished condition be distinguished?

Request dated photos of the Siemens seal, packaging, terminal surfaces and connector pins. A new unit should show no insertion marks, altered labels or cabinet dust.

Q3. How can a supplier be checked before purchase?

Verify the legal company name, registration details, traceable payment account and a written quotation identifying 6ES7921-5CK20-0AA0 and the agreed condition.

Q4. Which specifications should engineering verify?

Confirm the target analog 40-pole S7-1500 module, one 50-pole IDC connection, 24 V DC rating, 1 A contact limit, cable length and cabinet space against the Siemens drawing.

Q5. What evidence should be requested before payment?

Ask for current photos showing the complete model label, connector faces, original packaging and quantity, together with a timestamp or purchase-order reference.

Q6. Can a similar suffix or connector module replace it?

Not automatically. Different TOP connect suffixes can change the I/O type, pole arrangement or potential-supply method, so use the exact interface documented for the installed analog module.

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RECOMMEND MODEL

6ES7921-5CK20-0AA0

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