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- Siemens 6ES7921-3AF00-0AA0 SIMATIC TOP Connect Front Connector 20-Pole Spring Analog PLC Connection Module Siemens 6ES7921-3AF00-0AA0 SIMATIC TOP Connect Front Connector 20-Pole Spring Analog PLC Connection Module
Siemens 6ES7921-3AF00-0AA0 SIMATIC TOP Connect Front Connector 20-Pole Spring Analog PLC Connection Module
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- Description
The Siemens 6ES7921-3AF00-0AA0 is a SIMATIC TOP connect front connector module for S7-300 analog I/O modules. It carries the signal wiring through a single 16-pole IDC cable connection and feeds power through spring clamp terminals rated 24 V DC, 1 A, with just one L+ and one M terminal for the module's own supply. It plugs directly into the analog module in place of the factory front connector.
Technical Specifications
| SKU (Order No.) | 6ES7921-3AF00-0AA0 |
| Brand | Siemens |
| Series | SIMATIC TOP connect |
| EAN | 4025515065784 |
| Target System | SIMATIC S7-300 |
| Suitability For Use | Analog 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 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 | 2 (1x L+, 1x M) |
| Power Supply Connection Type | Spring clamp |
| 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 |
| 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 | 0.066 kg |
| Country of Origin | Poland |
Certifications & Standards
- cULus
Selection Notes
With only one L+/M terminal pair, this connector matches analog modules that draw a single supply feed rather than the multi-terminal digital variants in the same TOP connect family. Spring clamp terminals connect that feed without a screwdriver, which helps when analog cards are swapped during commissioning; pick the screw-terminal version where the panel spec calls for a checkable torque on the supply connection.