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Siemens SIPLUS PCS 7 SM 321 Digital Input Module

Siemens SIPLUS SM 321: 16DI, 24V DC Digital Input Module.

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ManufacturerSiemens

Part number6AG1321-7TH00-4AB0

Type Digital Input Module

Manufacturer Siemens

Series SIPLUS PCS 7 SM 321

Part Number 6AG1321-7TH00-4AB0

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16 Digital Inputs (24V DC) Conformal Coating Diagnostics Capable Open-Circuit Detection Chatter Monitoring

Product description

The Siemens 6AG1321-7TH00-4AB0 is a SIPLUS PCS 7 SM 321 digital input module, based on the 6ES7321-7TH00-0AB0. It features 16 digital inputs for 24 V DC, with diagnostic capabilities. The module includes conformal coating for enhanced environmental protection and operates in a temperature range of 0 to 60 °C. It is designed for wired or non-wired connections, NAMUR encoders, and 3/4-wire BERO sensors, with chatter monitoring and open-circuit detection. An IM 153-2 interface module is required for connection.

This module is ideal for demanding industrial environments, particularly in process control (PCS 7) and other automation applications where reliable digital signal acquisition is critical. Its conformal coating makes it suitable for harsh conditions with moisture or corrosive atmospheres.

Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, offers the Siemens 6AG1321-7TH00-4AB0. Trust us for quality components and expert service.

Technical specifications

Type	Digital Input Module
Manufacturer	Siemens
Series	SIPLUS PCS 7 SM 321
Part Number	6AG1321-7TH00-4AB0
Inputs	16 DI
Voltage	24 V DC
Temperature	0 to 60 °C
Coating	Conformal
Diagnostics	Yes
Connection	1x 40-pole

Common applications

Process Control

Manufacturing Automation

Chemical Plants

Food & Beverage

Water Treatment

Hazardous Environments

Compatible systems

SIMATIC PCS 7 SIMATIC S7-300 IM 153-2 Interface Modules

Also known as

Siemens SIPLUS SM 321 6AG1321 Digital Input Siemens 16 Channel Input

Replaces / compatible with

This module is an enhanced version of the 6ES7321-7TH00-0AB0, offering conformal coating and diagnostics for harsher environments.

Technical note

Expert tip

Requires an IM 153-2 interface module for integration into the SIMATIC system. Conformal coating provides resistance to humidity and corrosive atmospheres.

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Frequently asked questions

What are the key features of the Siemens 6AG1321-7TH00-4AB0 SIPLUS SM 321 module?

The Siemens 6AG1321-7TH00-4AB0 features 16 digital inputs (24V DC), conformal coating for environmental protection, and diagnostic capabilities for open-circuit detection and chatter monitoring.