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Siemens SIMATIC S7-300 16-Channel 120V AC Digital Input Module

Siemens SIMATIC S7-300 16-Channel 120V AC Digital Input Module.

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ManufacturerSiemens

Part number6ES7321-1EH01-0AA0

Module Type Digital Input SM 321

Channels 16 DI

Voltage 120V AC

Isolation Optically Isolated

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16 optically isolated digital inputs 120V AC operation High noise immunity SIMATIC S7-300 compatible Robust design

Product description

The Siemens 6ES7321-1EH01-0AA0 is a SIMATIC S7-300 digital input module featuring 16 optically isolated digital inputs. This module is designed for 120V AC input signals and connects using a 20-pin interface, providing reliable input for automation systems.

This module is suitable for applications requiring the monitoring of 120V AC control signals, commonly found in motor controls, lighting systems, and general industrial machinery. Its optical isolation enhances noise immunity and protects the PLC from external electrical interference.

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Technical specifications

Module Type	Digital Input SM 321
Channels	16 DI
Voltage	120V AC
Isolation	Optically Isolated
Connector	1x 20-pin
Series	SIMATIC S7-300

Common applications

Motor control

Lighting control

Machine automation

Industrial monitoring

Process control

Compatible systems

SIMATIC S7-300 PLC Systems

Also known as

Siemens S7-300 120V AC Input Module SM 321 16 DI AC 6ES73211EH010AA0

Replaces / compatible with

This Siemens digital input module is designed for the SIMATIC S7-300 platform. It effectively handles 120V AC signals for input to the PLC.

Technical note

Expert tip

Ensure that the incoming 120V AC signals are within the specified range and properly phased to avoid any operational issues with the 20-pin connector.

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Frequently asked questions

What type of isolation does the Siemens 6ES7321-1EH01-0AA0 module provide?

The Siemens 6ES7321-1EH01-0AA0 module features optically isolated digital inputs. This provides excellent noise immunity and protection for the PLC when interfacing with 120V AC signals.