Siemens SIMATIC

Siemens SIMATIC S7-400 PLC Parts

Source CPUs, power supplies, I/O modules and communication for S7-400 large PLC systems. We supply replacement parts for high-availability automation. 16+ models available.

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High-end CPUs

S7-400 CPU 412, 414, 416, 417 series for large-scale process and factory automation.

I/O Modules

Digital and analog I/O modules for large automation systems with high channel counts.

Power Supplies

PS405 and PS407 power supply modules for S7-400 rack systems.

Popular Siemens S7-400 Models

These large-system PLC models are used in process manufacturing and high-availability applications.

Model	Product	Category	Quote
6ES7 412-2EK06-0AB0	CPU 412-2 PN/DP	PLC	View Details →
6ES7 414-3EM05-0AB0	CPU 414-3 PN/DP	PLC	View Details →
6ES7 414-4HM14-0AB0	CPU 414-4H CPU Redundant	PLC	View Details →
6ES7 414-4HM14-0AB4	CPU 414-4H CPU Redundant	PLC	View Details →
6ES7 416-2FN05-0AB0	CPU 416-2 DP	PLC	View Details →
6ES7 416-3ER05-0AB0	CPU 416-3 PN/DP	PLC	View Details →
6ES7 417-4HT14-0AB0	CPU 417-4H Redundant	PLC	View Details →
6ES7416-2XP05-0AB0	SIMATIC S7-400 CPU416-2	PLC	View Details →
6ES7421-1EL00-0AA0	SIMATIC S7-400 SM421 Input Module 32-pt	PLC	View Details →
6ES7431-1KF00-0AB0	SIMATIC S7-400 SM431 Input Module 8-ch	PLC	View Details →
6ES7443-1EX30-0XE0	SIMATIC S7-400 CP443-1 Module	PLC	View Details →
6ES7954-8LC02-0AA0	6ES7954-8LC02-0AA0	Controller	View Details →
6ES7954-8LE03-0AA0	6ES7954-8LE03-0AA0	PLC	View Details →
6GK7 443-1EX20-0XE0	6GK7 443-1EX20-0XE0	Communication	View Details →
6GK7 443-1EX30-0XE0	SIMATIC NET CP 443-1 Advanced	Communication	View Details →
CU2508-2DP-1	CU2508-2DP-1	Communication	View Details →

Showing 30 of 16 models. All models are available for quotation.

S7-400 Product Categories

High-performance CPUs

From 412 to 417 performance levels for large automation systems.

Digital I/O Modules

High-density digital input and output modules for rack systems.

Analog I/O Modules

Precision analog modules for process control applications.

Communication

PROFINET, PROFIBUS, and network communication processors.

Need a Siemens S7-400 Part?

Send us the exact 6ES7 part number. We check availability and reply with price, condition and lead time.

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Popular S7-400 Models in Stock

6ES7 412-2EK06-0AB0

CPU 412-2 PN/DP

6ES7416-2XP05-0AB0

SIMATIC S7-400 CPU416-2

6ES7421-1EL00-0AA0

SIMATIC S7-400 SM421 Input Module 32-pt

6ES7431-1KF00-0AB0

SIMATIC S7-400 SM431 Input Module 8-ch

6ES7443-1EX30-0XE0

SIMATIC S7-400 CP443-1 Module

Every unit is tested before shipment. Request a quotation for the exact model you need.

Siemens S7-400 Buying FAQ

Can you supply discontinued S7-400 parts?

Yes. We specialize in legacy and discontinued automation parts. S7-400 CPUs, power supplies, I/O modules and communication processors are available from surplus stock or verified sourcing channels.

Are the S7-400 parts new or used?

We stock new surplus, refurbished and tested used units. Every unit is inspected, tested and photographed before shipment, and comes with our 12-month warranty.

How long does shipping take?

DHL, FedEx and UPS delivery typically takes 3 to 7 working days worldwide. For urgent breakdowns we can arrange express dispatch within 24 hours of confirmation.

Can you match a specific Siemens part number?

Send us the part number and we will confirm stock, compatibility, condition and price. Most S7-400 modules can be sourced from stock or verified suppliers.

Do you provide warranty on refurbished modules?

Yes, all parts carry a 12-month replacement warranty. We also provide test reports and photos before dispatch on request.