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SIEMENS · PRODUCT PROFILE

6ES7321-1CH00-0AA0

SIMATIC S7-300 SM 321 Digital Input Module

Series: SIMATIC S7-300

PRODUCT SNAPSHOT

The Siemens 6ES7321-1CH00-0AA0 SM 321 is an isolated 16-channel digital input module for 24–48 V AC/DC signals. Individual channel rooting and a 40-pole front connection make it suitable for flexible field-input integration in S7-300 systems.

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RELATED MODELS

CONNECTIVITY · COMPLIANCE

Integration requirements and verified standards

COMMUNICATION & CONNECTION

◆Transfers field-input status through the SIMATIC S7-300 backplane bus

◆Uses one 40-pole front connector with individual channel rooting

◆Coordinate terminal assignment and input reference potential during wiring

CERTIFICATION & STANDARDS

◆RoHS conformity documented since 31 March 2010

◆Use Siemens product-specific declarations for required market approvals

◆Install according to S7-300 electrical and EMC practices

OFFICIAL TECHNICAL DATA

Product type

Digital input module

Channels

16 DI

Input voltage

24–48 V AC/DC

Isolation

Galvanically isolated

Connection

1 × 40-pole

Lifecycle

Phase-out announced

BRAND VALUE · APPLICATION FIT

Built for dependable industrial integration

BRAND CHARACTERISTICS

◆Reliable Siemens signal acquisition for mixed AC/DC field inputs

◆Channel isolation supports robust industrial measurement

◆Modular S7-300 format enables straightforward replacement

◆Established diagnostics and engineering workflow

APPLICATION FIELDS

◆Machine interlocks and limit-switch monitoring

◆Process and utility status acquisition

◆Conveyor and material-handling controls

◆S7-300 maintenance and capacity expansion

RECOMMENDED MODELS

SIEMENS

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6DL1131-6BH00-0PH1

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6SL3955-0TX00-1AA0

6SL3955-0TX00-1AA1

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6ES7350-2AH00-0AE0

6ES7322-1HH01-0AA0

6ES7314-6BG03-0AB0

6ES7650-8AR60-0AA0

6ES7675-1DA20-1AA0

6GK1561-4AA00

6ES7441-1AA05-0AE0

6GK5202-2BH00-2BA3

6GK5307-3BM00-2AA3

BECKHOFF

CX9020-0111

CX5130-0125

CX5140-0150

CX2043-0155

EK1100

EK1110

EL1008

EL1809

EL2008

EL2809

EL3054

EL3064

EL4008

EL6695

EL6900

KL1408

KL2408

KL3054

BK1120

CP2916-0000

SERVICE & POLICY

Verification before supply

SERVICE PROCESS

Identify

Confirm complete order code

Verify

Check revision and condition

Quote

Provide price and lead time

Dispatch

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Hot Tags :

6ES7321-1CH00-0AA0

Siemens SM 321

S7-300 Digital Input

16 DI 24 48 V

Isolated Input Module

40 Pole SIMATIC Module

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