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- Siemens 6ES7921-5AB20-0AA0 SIMATIC TOP connect Front Connector S7-1500 32 I/O Screw PLC Connection Module Siemens 6ES7921-5AB20-0AA0 SIMATIC TOP connect Front Connector S7-1500 32 I/O Screw PLC Connection Module
Siemens 6ES7921-5AB20-0AA0 SIMATIC TOP connect Front Connector S7-1500 32 I/O Screw PLC Connection Module
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- Description
The Siemens 6ES7921-5AB20-0AA0 is a SIMATIC TOP connect front connector module for digital 32-channel I/O modules on the S7-1500. It carries four 16-pole IDC connectors for the field cabling and feeds potential supply through 8 screw terminals, rated 24 V DC at up to 1 A per plug-in contact and 2 A total in horizontal mounting.
Technical Specifications
| SKU | 6ES7921-5AB20-0AA0 |
| EAN | 4019169845526 |
| Brand | Siemens |
| Series | SIMATIC TOP connect |
| Target System | SIMATIC S7-1500 |
| Suitability | Digital I/O modules |
| 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 Plug-In Contact (DC) | 1 A |
| Max Total Current | 2 A (horizontal mounting position) |
| Number of Poles (Front Connector) | 40 |
| Connecting Cable Interface | Plug-in connection, 4 x 16-pole IDC connectors |
| Number of Plug Contacts | 4 |
| Max Wire Length to Terminal Module | 30 m |
| Number of Power Supply Terminals | 8 (4 x L+, 4 x M) |
| Power Supply Connection | Screw-type terminal, positioned at the top |
| Connectable Conductor Cross-Section | 0.5-2.5 mm² stranded; 0.25-1.5 mm² with core end sleeve per DIN 46228 |
| Stripped Length | 10 mm |
| Wire Insulation Outer Diameter | 3.1 mm |
| Screwdriver Blade Width | 3.5 mm |
| Tightening Torque | 0.4-0.7 N·m |
| Overvoltage Category | 2 |
| Degree of Pollution | 2 |
| Operating Temperature | 0...60 °C |
| Storage Temperature | -40...+70 °C |
| Mounting Type | Direct mounting |
| Enclosure Color | Black |
| Net Weight | 0.099 kg |
Certifications & Standards
- cULus
Selection Notes
The four 16-pole IDC connectors on this module map to a full 32-channel digital I/O card, and the 8 screw terminals (4 x L+, 4 x M) split the potential feed across the module's two connector halves for a horizontal mounting position. Conductor capacity runs up to 2.5 mm² stranded, wider than the 313/314-series connector, because the S7-1500 I/O terminal blocks need heavier supply wiring. Use the push-in variant instead when the cabinet standard calls for tool-less termination rather than a screwdriver.