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Siemens SIPLUS S7-300 SM 321 Digital Input Module

Siemens SIPLUS S7-300 SM 321 16-channel digital input module.

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ManufacturerSiemens

Part number6AG1321-7BH01-4AS0

Part Number 6AG1321-7BH01-4AS0

Manufacturer Siemens

Series SIPLUS S7-300 SM 321

Type Digital Input Module

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16 isolated 24V DC digital inputs Conformal coating for harsh environments Suitable for 0°C to +60°C operation Supports hardware interrupts and diagnostics Isochronous-mode capable Based on 6ES7321-7BH01-0AB0

Product description

The Siemens 6AG1321-7BH01-4AS0 is a SIPLUS S7-300 SM 321 digital input module. Based on the 6ES7321-7BH01-0AB0, this module features conformal coating for enhanced environmental protection and operates in a temperature range of 0°C to +60°C. It provides 16 digital inputs (DI) that are isolated and designed for 24V DC signals, with a 0-1 threshold at approximately 11.2V. The module includes a 20-pole connector, supports hardware interrupts, diagnostics, and is suitable for isochronous-mode operation.

This module is integral to Siemens S7-300 automation systems, used in various industrial applications requiring robust digital input acquisition. It is particularly valuable in harsh environments due to its conformal coating, making it suitable for industries such as chemical processing, food and beverage, and outdoor installations where moisture or contaminants are present.

Stanlo Automation, your veteran-owned source for surplus industrial automation parts, offers the Siemens 6AG1321-7BH01-4AS0. We ensure quality and reliability, helping you minimize downtime and optimize your S7-300 system with dependable components.

Technical specifications

Part Number	6AG1321-7BH01-4AS0
Manufacturer	Siemens
Series	SIPLUS S7-300 SM 321
Type	Digital Input Module
Channels	16 DI
Voltage	24V DC
Threshold	~11.2V (0-1)
Temperature	0°C to +60°C
Coating	Conformal
Connector	1x 20-pole
Features	Isolated, Hardware Interrupt, Diagnostics, Isochronous-mode

Common applications

Industrial automation

PLC systems

Manufacturing control

Process monitoring

Harsh environment applications

S7-300 PLC integration

Compatible systems

Siemens S7-300 PLC systems

Also known as

Siemens SIPLUS SM 321 DI module S7-300 16DI module 6AG1321-7BH01-4AS0

Replaces / compatible with

This SIPLUS module is an enhanced version of the standard Siemens 6ES7321-7BH01-0AB0, offering conformal coating for added protection.

Technical note

Expert tip

The conformal coating on this SIPLUS module requires specific cleaning procedures to avoid damage; consult Siemens guidelines.

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Frequently asked questions

What is the benefit of the conformal coating on the Siemens 6AG1321-7BH01-4AS0 module?

The conformal coating on the Siemens 6AG1321-7BH01-4AS0 SIPLUS module provides enhanced protection against moisture, dust, and corrosive substances. This makes it ideal for use in demanding industrial environments where standard modules might fail.