6AG1321-1FH00-7AA0 Siemens S7-300

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Siemens 6AG1321-1FH00-7AA0 SIPLUS S7-300 SM 321 digital input module, 16DI 120/230 V AC

Part Specifications

Manufacturer: Siemens HS Code: 85389091 EAN: 4042948494905 SKU: 6AG1321-1FH00-7AA0 Country of Origin: DE Product Weight: 0.209 Packaging Height: 5.00 CM Packaging Length: 13.00 CM Packaging Width: 15.00 CM
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Express delivery available

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Full 12-month warranty

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Fast global shipping options

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Product description

6AG1321-1FH00-7AA0 Siemens SIPLUS S7-300 SM 321 Digital Input

The Siemens 6AG1321-1FH00-7AA0 is a SIPLUS S7-300 SM 321 digital input module. Its primary function is to process consistent, high-voltage AC signals, making it ideal for use in automation systems. The 6ES7321-1FH00-0AA0 standard served as the basis for this SIPLUS edition’s development.

A conformal protective covering is included into it. Protecting electronics from moisture, dust, and harsh industrial environments is the job of this coating.

Between -40 °C and +70 °C, it functions reliably. Because of this, it is a great pick for industries that need equipment that can withstand harsh environments.

Core electrical features:

This DI module accepts signals from both 120 V and 230 V AC sources and provides 16 separate inputs (DI). The 6AG1321-1FH00-7AA0 accommodates higher voltages. This feature ensures compatibility with a wide range of field devices, including switches, sensors, and monitoring equipment.

A 20-pole connector is a feature of the module. The current Siemens S7-300 PLC platforms can be more easily integrated with this approach. Engineers can use it to speed up installation while still making sure the system is reliable.

Application areas:

The 6AG1321-1FH00-7AA0 finds use across industries where robust AC input handling is critical:

  • Utilities and energy distribution – reliable monitoring of AC signals in substations or grid applications
  • Industrial production lines – dependable control in heavy manufacturing environments
  • Transportation and infrastructure – proven performance in roadside, rail, and tunnel automation systems
  • Process industries – ensures operational stability in chemical, oil and gas, and other demanding fields

Its rugged design makes it ideal for scenarios where downtime is costly and reliability is non-negotiable.

Design and build

This module strikes a good mix between small size and industrial strength, being both lightweight (weighing only 0.209 kg) and very durable. Its design ensures both efficiency and reliability, even in space-constrained control cabinets.

  • EAN: 4042948494905
  • Country of Origin: Germany
  • Commodity Code: 85389091
  • Category: Controllers, Distributed I/O Devices, I/O Extension Modules, Siemens Simatic S7

Lifecycle information

⚠️ Notice: The Siemens 6AG1321-1FH00-7AA0 will be discontinued on 1st October 2025. To maintain continuity of service, spare units should be secured in advance.

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