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Siemens SIMATIC TOP connect 6ES7921-5AB20-0AA0 S7-1500 Digital Front Connector Module | Original New

Siemens SIMATIC TOP connect 6ES7921-5AB20-0AA0 S7-1500 Digital Front Connector Module | Original New

SIEMENS · SIMATIC TOP CONNECT

6ES7921-5AB20-0AA0

S7-1500 digital front connector module with four 16-pole IDC connections

INTERFACE 4 × 16-pole IDC	MODULE SIDE 40-pole front connector
LEAD TIME In stock	WARRANTY 1 year

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WhatsApp +86 18159889985

Appurtenance:

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

PRODUCT OVERVIEW

6ES7921-5AB20-0AA0

S7-1500 digital front connector module with four 16-pole IDC connections

Product Overview 1

6ES7921-5AB20-0AA0 is a SIMATIC TOP connect fully modular front connector module for digital 32-channel I/O modules in the SIMATIC S7-1500 family.

Product Overview 2

It provides four 16-pole IDC plug contacts and a 40-pole module-side front connector, with potential supply handled through screw terminals.

Product Overview 3

The design supports repeatable cabinet wiring with a maximum 30 m connecting-cable length between the front connector and terminal module.

Technical Data

TECHNICAL DATA

6ES7921-5AB20-0AA0

S7-1500 digital front connector module with four 16-pole IDC connections

Complete model	6ES7921-5AB20-0AA0
Product family	SIMATIC TOP connect for SIMATIC S7-1500
Product type	Fully modular digital front connector module
Target system	SIMATIC S7-1500
Suitable I/O type	Digital 32-channel I/O modules
Dimensions	Approx. 29.8 × 130.5 × 45.5 mm overall, per Siemens drawing
Weight	0.099 kg
Rated voltage	24 V DC
Maximum voltage	60 V
Continuous current	Maximum 1 A per contact; aggregate 2 A horizontal
Module-side connector	40 poles
Cable-side interfaces	Four 16-pole IDC plug contacts
Potential supply	Screw terminals
Supply terminals	8 terminals: 4 × L+ and 4 × M
Conductor range	0.25 to 1.5 mm² flexible with end processing; 0.5 to 2.5 mm² stranded without end processing
Strip length	10 mm
Tightening torque	0.4 to 0.7 N·m
Maximum cable length	30 m
Mounting	Direct mounting
Operating temperature	0 to 60 °C
Storage temperature	-40 to +70 °C
Approval	cULus

Inquiry

CONTACT

STELLA

Direct product inquiry

Email Inquiry [email protected]

WhatsApp +86 18159889985

Applications

APPLICATIONS

6ES7921-5AB20-0AA0

Official product-specific information

Digital I/O wiring

Connects compatible S7-1500 digital 32-channel modules to four organized 16-pole IDC cable groups.

Panel standardization

Supports repeatable production of modular cabinet wiring using the SIMATIC TOP connect system.

Potential distribution

Provides dedicated L+ and M screw-terminal groups for the documented potential-supply arrangement.

Serviceability

Separated IDC groups and labeled supply terminals simplify inspection and controlled module replacement.

Construction

CONSTRUCTION

6ES7921-5AB20-0AA0

Official product-specific information

Module interface

The S7-1500 side uses a 40-pole front connector intended for digital 32-channel I/O modules.

Cable interfaces

Four 16-pole IDC plug contacts divide the field wiring into structured connection groups.

Supply terminals

Eight screw terminals provide four L+ and four M connection points.

Mechanical format

The compact connector body follows the Siemens dimensional drawing at approximately 29.8 × 130.5 × 45.5 mm.

Installation

INSTALLATION

6ES7921-5AB20-0AA0

Official product-specific information

Direct mounting

Mount directly in the specified S7-1500 front-connector position and maintain access to the screw terminals.

Conductor preparation

Observe the documented conductor ranges, 10 mm strip length and 0.4 to 0.7 N·m tightening torque.

Cable routing

Use compatible 16-pole IDC connecting cables and keep the total connection within the 30 m maximum.

Commissioning check

Verify polarity at every L+ and M terminal before applying the rated 24 V DC supply.

Compatibility

COMPATIBILITY

6ES7921-5AB20-0AA0

Official product-specific information

Supported platform

Designed for SIMATIC S7-1500 digital 32-channel I/O modules.

Documented module classes

Siemens documents use with digital input and output modules such as DI 32x24VDC HF and DQ 32x24VDC/0.5A ST.

Connection matching

All four cable groups must use the documented 16-pole IDC interface and compatible terminal modules.

Environmental scope

Operate from 0 to 60 °C within overvoltage category 2 and pollution degree 2 conditions.

FAQ

6ES7921-5AB20-0AA0

Product verification and procurement guidance

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

Match 6ES7921-5AB20-0AA0 on the nameplate and packaging, then verify the 40-pole module connector, four 16-pole IDC ports and eight screw supply terminals.

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

Request close photos of all IDC contacts, screw terminals, housing and Siemens labels. New stock should not show tool marks, wire residue, insertion wear or relabeling.

Q3. How can a supplier be checked before purchase?

Confirm legal registration, a traceable company account and a quotation that identifies 6ES7921-5AB20-0AA0, quantity, condition and inspection evidence.

Q4. Which specifications should engineering verify?

Check the digital 32-channel S7-1500 module type, four 16-pole IDC interfaces, L+/M terminal layout, conductor range, torque, cable length and cabinet dimensions.

Q5. What evidence should be requested before payment?

Require dated photos of the full model label, all four IDC interfaces, the screw-terminal block and sealed packaging, preferably beside the purchase-order number.

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

No automatic substitution is valid. Analog and digital TOP connect variants use different interface arrangements, and suffix changes can alter the connector or supply configuration.

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RECOMMEND MODEL

6ES7921-5AB20-0AA0

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