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Siemens 6ES7921-3AB00-0AA0 SIMATIC TOP Connect Front Connector 20-Pole Screw PLC Connection Module

% $-75.70
Siemens 6ES7921-3AB00-0AA0 SIMATIC TOP connect front connector module - 20-pole screw
Siemens 6ES7921-3AB00-0AA0 SIMATIC TOP connect front connector module - 20-pole screw

Siemens 6ES7921-3AB00-0AA0 SIMATIC TOP Connect Front Connector 20-Pole Screw PLC Connection Module

Brand: Siemens
Reference No: 6ES7921-3AB00-0AA0
Catalog No: 6ES7921-3AB00-0AA0
Series: SIMATIC TOP connect
Tariff Code (HS): 85366990
Rated Current: 1 A
Rated Voltage: 24 V
Stock: 0
Delivery time: 10-15 business day(s)
Shipping Origin: Türkiye EXW
$75.70

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  • Description

The Siemens 6ES7921-3AB00-0AA0 is a SIMATIC TOP connect front connector module that replaces the standard 20-pole front connector on S7-300 digital I/O modules wired for 16 channels. It carries signals through a single 16-pole IDC cable connection and feeds power through screw-type terminals rated 24 V DC, 1 A per contact, torqued to 0.4-0.7 N·m. It plugs directly into the module in place of the factory connector.

Technical Specifications

SKU (Order No.) 6ES7921-3AB00-0AA0
Brand Siemens
Series SIMATIC TOP connect
EAN 4025515065753
Target System SIMATIC S7-300
Suitability For Use Digital I/O modules (16-channel)
Product Designation Front connector module
Rated Operating Voltage (DC) 24 V
Maximum Operating Voltage (DC) 60 V
Rated Current 1 A
Max. Continuous Current per Contact (DC) 1 A
Max. Total Current 4 A
Number of Poles (Front Connector) 20
Connecting Cable Connection Type Plug-in connection
Poles at 1st Interface 16 (IDC connector)
Number of Plug Contacts 2
Max. Wire Length 30 m
Number of Terminals 4 (2x L+, 2x M)
Power Supply Connection Type Screw-type terminal
Terminal Position At the top
Conductor Cross-Section, Flexible with Ferrule 0.25-1.5 mm²
Conductor Cross-Section, Stranded 0.25-1.5 mm²
Stripped Length 6 mm
Screwdriver Blade Width 3.5 mm
Tightening Torque, Screw Terminals 0.4-0.7 N·m
Overvoltage Category 2
Pollution Degree 2
Operating Temperature 0...60 °C
Storage Temperature -40...+70 °C
Mounting Type Direct mounting
Enclosure Color Black
Net Weight 0.099 kg
Country of Origin Poland

Certifications & Standards

  • cULus

Selection Notes

The 20-pole count matches a single 16-pole IDC cable, so this variant fits the 16-channel digital modules rather than the 32-channel modules that need the 40-pole connector. Screw terminals give a documented 0.4-0.7 N·m tightening torque for panels that require a verifiable supply connection instead of a tool-free one; pick the spring-terminal version where wiring speed during commissioning matters more than a torque record.

Technical Details

Short Description
SIMATIC TOP connect 20-pole front connector, screw terminals, for S7-300 16-ch digital I/O modules, 24V DC.
Rated Current (Ampere)
1 A
Rated Voltage (VAC)
24 V
Mounting Type
Direct mounting
Catalog No
6ES7921-3AB00-0AA0
Standards
/ cULus approval
Delivery Date (Days)
10-15 days
Model Number
6ES7921-3AB00-0AA0
Tariff Code
85366990

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