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Siemens 6ES7321-1FH00-0AA0 DIGITAL INPUT SM 321 Ready For Ship

Siemens 6ES7321-1FH00-0AA0 DIGITAL INPUT SM 321 Ready For Ship

Product Name:DIGITAL INPUT SM 321

Brand Name:Siemens

Model Number:6ES7321-1FH00-0AA0

Country of Origin:Germany

Warranty: 12 Months

Whatsapp：+86 18159889985

Email：[email protected]

Appurtenance:

siemens 6es7321 1fh00 0aa0 digital input sm 321 ready for ship-1

Overview
Contact for quotation
Specifications
Description
Applications
Features
Functions
FAQ
Spares
Recommended Products

Overview

Brand Name:	Siemens
Model Number:	6ES7321-1FH00-0AA0
Country of Origin:	Germany
Packaging Details:	Original new Factory Sealed
Delivery Time:	in stock
Payment Terms:	T/T

Contact for quotation

Sales Manager:	Stella
Send an email:	[email protected]
Contact in Whatsapp:	+86 18159889985

Specifications

Item	Details
Product Model	6ES7321-1FH00-0AA0
Series	SIMATIC S7-300
Module Type	Digital Input SM 321
Input Channels	16 DI
Input Voltage	120 / 230 V AC
Frequency Range	47 – 63 Hz
Input Signal “1”	79 – 264 V AC
Input Signal “0”	0 – 40 V AC
Power Loss	~4.9 W
Backplane Current	Max. 29 mA
Cable Length (Shielded)	Up to 1000 m
Cable Length (Unshielded)	Up to 600 m
Isolation	4000 V DC tested
Opto Isolation	Between inputs and backplane bus
Connector Type	20-pin front connector
Width	40 mm
Height	125 mm
Depth	120 mm
Weight	~240 g

Description

The 6ES7321-1FH00-0AA0 is a SIMATIC S7-300 SM 321 digital input module designed for reliable acquisition of AC field signals in industrial automation systems. It features 16 optically isolated digital inputs supporting 120/230 V AC operation, ensuring stable performance in high-voltage control environments.

The 6ES7321-1FH00-0AA0 provides robust signal detection with IEC 61131 Type 1 input characteristics and supports long-distance wiring up to 1000 m for shielded cables, making it suitable for large-scale industrial installations.

With strong galvanic isolation via optocouplers, integrated status LED indication, and dependable signal processing, the 6ES7321-1FH00-0AA0 ensures safe and efficient integration into SIMATIC S7-300 automation architectures.

Applications

Power plants: Generator monitoring and relay protection systems
Substations: Bus protection and signal acquisition control
Chemical plants: Process automation and signal isolation monitoring
Steel mills: High EMI and high-temperature industrial control systems
Machinery manufacturing: Automated production lines and machine control

Features

16-channel AC digital input module
Optically isolated input design for high safety
Supports 120/230 V AC industrial signals
Long-distance cable transmission up to 1000 m
IEC 61131 Type 1 input compatibility
Integrated LED status indicators

Functions

AC digital signal acquisition
Industrial switch status monitoring
Electrical isolation and signal protection
Distributed control system integration
High-voltage input processing for automation

FAQ

Q1: What is the main function of 6ES7321-1FH00-0AA0?
A1: It is used for reading 120/230 V AC digital input signals in S7-300 systems.

Q2: How many inputs does this module support?
A2: It provides 16 optically isolated digital input channels.

Q3: Is this module suitable for long-distance wiring?
A3: Yes, it supports up to 1000 m shielded cable length.

Q4: Does it provide electrical isolation?
A4: Yes, it uses optocoupler isolation between inputs and backplane bus.

Q5: What type of signals can it detect?
A5: It detects AC signals from 120 V to 230 V industrial systems.

Spares

Column 1	Column 2
6SL5510-1BE10-4AF0	6ES7145-5ND00-0BA0
6GK7243-5DX30-0XE0	6GK5124-0BA00-2AA3
6AV6648-0DE11-3AX0	6AV2124-0UC02-0AX1
6ES7323-1BH01-0AA0	3RX9501-1BA00
6ES7355-1VH10-0AE0	6ES7232-0HB22-0XA8
6AV7230-0DA20-0BA0	6ES7222-1HF32-0XB0
6ES7141-1BF12-0XB0	6ES7214-1BG31-0XB0
6DD1607-0AA1	6GK7242-5DX30-0XE0
6ES7151-1CA00-1BL0	6GT2002-0JE40
6ES7151-1CA00-3BL0	6ES7138-6DB00-0BB1
6AV2128-3QB06-0AX0	6EP7133-6AB00-0BN0
6ES7132-4BD32-0AA0	6ES7133-1BL01-0XB0
3RK1301-0KB00-1AA2	6GK5992-1AL00-8TA0