6AG1321-1FF10-7AA0 - Siemens S7-300 PLC Modules
The Siemens 6AG1321-1FF10-7AA0 is a SIPLUS S7-300 SM 321 digital input module with 8 isolated AC inputs channels rated. This module integrates into Siemens Programmable Logic Controller systems within the SIMATIC S7-300 IO module series, supporting 120/230 V AC inputs, -25 to +70 °C operation, optocoupler-based potential separation, and 40-pin front connector wiring for industrial panels.

| Brand | Siemens |
| Product Type | Programmable Logic Controller (PLC) |
| Product | 6AG1321-1FF10-7AA0 |
Siemens S7-300 PLC Modules 6AG1321-1FF10-7AA0 – Technical Specifications
| Specification | Value |
|---|---|
| Product Description | SIPLUS S7-300 SM321 8DI/120/230VAC based on 6ES7321-1FF10-0AA0 with conformal coating, -25…+70 °C, digital input isolated, 8 DI, 120 V/230 V AC, 1x 40-pole, with single rooting/channel |
| Product family | SIPLUS S7-300 SM 321 |
| Product Lifecycle (PLM) | PM400:Phase Out Started |
| Net Weight (kg) | 0,328 Kg |
| Packaging Dimension | 15,00 x 13,00 x 5,00 |
| Package size unit of measure | CM |
| Country of origin | Germany |
The 6AG1321-1FF10-7AA0 Siemens S7-300 PLC Modules component is a SIPLUS SM 321 digital input unit for industrial automation systems. This module provides 8 isolated AC inputs rated at 120/230 V AC, operates across -25 to +70 °C, and uses optocoupler isolation for signal separation. It belongs to the SIMATIC S7-300 IO module family and supports stable signal conversion within PLC-based control architectures.
In industrial applications, the 6AG1321-1FF10-7AA0 Siemens S7-300 PLC Modules unit is used in conveyors, packaging machines, assembly lines, and plant automation systems. It enables reliable detection of AC field signals from switches and sensors while maintaining electrical separation between channels. The SIPLUS coating and defined temperature range support continuous operation in harsh environments where vibration, temperature variation, and electrical noise are present.
The Siemens 6AG1321-1FF10-7AA0 digital input module delivers predictable performance with standardized AC input handling and defined electrical isolation. As part of the Siemens SIMATIC S7-300 platform, it aligns with established PLC system designs and long-term maintenance strategies. This Siemens S7-300 PLC Modules spare component remains suitable for engineers maintaining legacy automation systems requiring durable, electrically isolated digital input expansion.




