Product details
Specifications
Recommand
Service & Policy

SIEMENS · PRODUCT DETAILS

Siemens 6ES7421-1FH00-0AA0 S7-400 Digital Input Module

Optically isolated high-voltage digital input module for signal acquisition in modular SIMATIC S7-400 systems.

CONDITIONNew Original

WARRANTYOne year

☎ +86 17359287459 ✉ sales9@apterpower.com

SYSTEM POSITION

SIMATIC S7-400 · SM 421

Sixteen isolated inputs for 120/230 V AC field signals in rack-based automation systems.

Product snapshot

The module acquires sixteen 120/230 V AC digital signals and provides optical isolation between field circuits and the S7-400 backplane.

It is suited to switches and two-wire proximity sensors used in established industrial control installations.

Explore other Siemens products →

OPERATING INSIGHT

Detailed product description

The SM 421 input module brings sixteen high-voltage field signals into a SIMATIC S7-400 automation system. Optical isolation supports reliable separation from the controller backplane. The module is intended for 120/230 V AC switching devices and compatible two-wire proximity sensors.

◇ Operating environment

Install in a compatible SIMATIC S7-400 rack with the documented 48-pin front connector and field wiring rated for 120/230 V AC. Follow the S7-400 clearance and grounding requirements.

◎ Monitoring & control

Channel states are available to the CPU and displayed at the module. System supervision should combine the input process image with field-circuit checks and the S7-400 diagnostic buffer.

Official technical data

Inputs
16 digital inputs

Rated input
120/230 V AC

Isolation
Optically isolated

Sensors
Switches and 2-wire sensors

Platform
SIMATIC S7-400

Module family
SM 421

Dimensions
2.5x29x21cm

Weight
0.65kg

BRAND & APPLICATION

Siemens brand characteristics

Siemens automation hardware uses coordinated controller, distributed I/O and engineering concepts across established industrial systems.

Documented order codes, module data and lifecycle paths support structured servicing and replacement planning.

Application fields

High-voltage status acquisition in process plants.

Lifecycle maintenance of installed S7-400 systems.

Recommended models

SIEMENS

6ES7421-1BL01-0AA0

6ES7421-1FH00-0AA0

6ES7422-1FH00-0AA0

6ES7422-1BL00-0AA0

6ES7422-1HH00-0AA0

6ES7431-1KF00-0AB0

6ES7431-7QH00-0AB0

6ES7432-1HF00-0AB0

6ES7441-1AA05-0AE0

6ES7441-2AA05-0AE0

6ES7407-0DA02-0AA0

6ES7407-0KA02-0AA0

6ES7407-0KR02-0AA0

6ES7412-1XJ05-0AB0

6ES7413-1XG02-0AB0

6ES7414-2XK05-0AB0

6ES7416-2XN05-0AB0

6ES7460-0AA01-0AB0

6ES7461-0AA01-0AA0

6ES7952-1AL00-0AA0

BECKHOFF

EL1008

EL1809

EL2008

EL2809

EL3002

EL3054

EL3064

EL4004

EL4102

EL4132

EL5001

EL5101

EL6001

EL6021

EL6731

EL6751

EK1100

EK1110

CX9020-0111

CX5130-0125

QUOTE & POLICY

Quote

Send the complete order code and required quantity for a checked price, availability and lead-time response.

Order support

Confirm the installed system, signal requirements and delivery destination before ordering replacement hardware.

Disclaimer

This website is not affiliated with, endorsed by, or authorized by any of the listed manufacturers or trademarks.

Ewolomodule is not an authorized distributor, dealer, or representative of the products displayed on this website.

All product names, trademarks, brands, and logos used on this website are the property of their respective owners.

The description, explanation, or sale of products with these names, trademarks, brands, and logos is for identification purposes only and is not intended to indicate any association with or authorization from any rights holder.

Hot Tags :

6ES7421-1FH00-0AA0

Siemens 6ES7421-1FH00-0AA0

6ES7421-1FH00-0AA0 Digital Input Module

SIMATIC S7-400 · SM 421

6ES7421-1FH00-0AA0 Price

6ES7421-1FH00-0AA0 Supplier

Leave A Message

If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Subject : Siemens 6ES7421-1FH00-0AA0 S7-400 Digital Input Module

Submit

Related products

Siemens 6GK5324-0GG10-3AR2 SCALANCE XR324-12M Managed Rack Industrial Ethernet Switch

Siemens 6GK5324-0GG10-3AR2 is a 19-inch managed rack switch for modular Industrial Ethernet networks. The 6GK5324-0GG10-3AR2 supports twelve two-port media modules, gigabit communication, PROFINET diagnostics, redundancy, VLANs, multicast control, and C-PLUG storage.

Siemens 6ES7516-3TN00-0AB0 SIMATIC S7-1500T CPU 1516T-3 PN/DP Technology CPU

Siemens 6ES7516-3TN00-0AB0 is a SIMATIC S7-1500T technology CPU with PROFINET IRT, Ethernet, and PROFIBUS. 6ES7516-3TN00-0AB0 coordinates advanced motion, logic, communication, and diagnostics in demanding industrial automation systems.