Home » Products » SIEMENS 6ES7390-0AA00-0AA0 SIMATIC S7-300 Front Connector

SIEMENS 6ES7390-0AA00-0AA0 SIMATIC S7-300 Front Connector

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Part No.: 6ES7390-0AA00-0AA0

Gross Weight: 1kg

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Description

The 6ES7390-0AA00-0AA0 is a 20-pin screw-type front connector designed for SIMATIC S7-300 I/O modules. This essential accessory enables secure, high-density wiring between field devices and your PLC system. GoldRayline maintains large-scale inventory for immediate global dispatch to support your terminal assembly.

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In stock • Worldwide fast shipping • Bulk discount available

Product Overview

Secure Field-to-Module Wiring Interface

The 6ES7390-0AA00-0AA0 is the standard 20-pin interface required for the vast majority of S7-300 signal modules (SM). It serves as the physical bridge between field-level wiring and the internal electronics of the PLC. Featuring robust screw-type terminals, this front connector ensures vibration-resistant electrical contact for digital and analog signals. Its design allows for the “pre-wiring” of the cabinet, as the connector can be fully wired before being snapped onto the module. This not only speeds up initial installation but also simplifies maintenance, as modules can be replaced without disconnecting individual field wires.

Reliable Connectivity for Industrial Expansion

At GoldRayline, we understand that even a high-end S7-300 CPU is useless without the correct 0AA00-0AA0 connectors to interface with the process. Because these 20-pin connectors are often required in large quantities—one for every I/O module—we maintain a high-volume, ready-to-ship stock. We prioritize original Siemens hardware to ensure the screw terminals do not strip under torque and the plastic casing remains crack-resistant in high-temperature environments. By supplying these essential accessories in bulk, we help our B2B partners complete their automation projects on schedule with verified, factory-standard connectivity.

Specifications

Model Number	6ES7390-0AA00-0AA0	Product Brand	SIEMENS
Product Type	Front Connector (Accessory)	Product Series	SIMATIC S7-300
Number of Pins	20-Pin	Termination Type	Screw Terminals
Compatibility	S7-300 / ET 200M	Wire Cross-section	0.25 to 1.5 mm²
Module Fit	40 mm Width SMs	Locking Mechanism	Snap-on / Screw Lock
Voltage Range	up to 230V AC/DC	Protection	IP20
Dimensions	20 x 125 x 30 mm	Net Weight	approx. 230 g

Related Siemens SIMATIC S7-300 Components

The 6ES7390-0AA00-0AA0 is the primary wiring partner for 20-pin S7-300 signal modules. GoldRayline stocks the compatible modules and rails to complete your control cabinet infrastructure.

Model Number	Component Type	Technical Role	Connection
6ES7321-1BH02-0AA0	Digital Input	16-Ch 24V DC Module	20-Pin Front Slot
6ES7322-1BH01-0AA0	Digital Output	16-Ch 24V DC Module	20-Pin Front Slot
6ES7331-7KF02-0AB0	Analog Input	8-Ch 12/14-bit Module	20-Pin Front Slot
6ES7332-5HD01-0AB0	Analog Output	4-Ch 12-bit Module	20-Pin Front Slot
6ES7392-2XX00-0AA0	Labeling Strips	Module Identification	Front Cover Fit
6ES7390-1AE80-0AA0	Mounting Rail	482mm Aluminum Track	Foundation Rack
6ES7307-1BA01-0AA0	Power Supply	PS 307 2A System Load	120/230V AC Input

Is the bus connector included when purchasing new Siemens I/O modules?

In the original Siemens packaging, a single 6ES7390-0AA00-0AA0 is typically included with every I/O, FM, and CP module. However, for maintenance projects or when purchasing used/refurbished parts, these connectors are often lost or missing. GoldRayline keeps them in stock specifically to fill these gaps and ensure your installation is not halted by a missing $10 part.

Can I use this connector for the S7-1500 or S7-1200 series?

No. The Siemens 6ES7390-0AA00-0AA0 is exclusively designed for the S7-300 and the ET 200M distributed I/O system. Newer PLC series like the S7-1500 use a different integrated backplane bus or a U-connector with a different pin configuration.

What happens if a bus connector is loose or damaged?

A faulty 6ES7390-0AA00-0AA0 will lead to intermittent “Hardware Fault” or “I/O Access Error” messages in the CPU diagnostics. If the CPU cannot see a module that is physically present, the first step in troubleshooting is to check if the U-connector is securely seated and that the pins on the module’s backplane are not bent.

How many connectors do I need for a rack with 5 I/O modules?

You need one connector for every gap between modules. For a CPU and 5 I/O modules (total 6 units), you would require 5 Siemens 6ES7390-0AA00-0AA0 connectors to link the entire chain.

Does this connector support the Hot Swapping (Active Bus) feature?

No. The 6ES7390-0AA00-0AA0 is a passive connector for standard DIN rails. For “hot swapping” (removing modules under power), you must use the Active Bus Modules (BM) and a special active backplane rail. This standard U-connector is for fixed, non-hot-swap configurations only.

Why should an international trader keep these in stock?

Because they are small and inexpensive, the 6ES7390-0AA00-0AA0 is an ideal “add-on” item. Offering these to a customer who is buying several I/O modules shows professional attention to detail, as it prevents the customer from being unable to start their machine because a single bus link was missing from their order.

What is GoldRayline's approach to the logistics of small accessories?

We understand that even a 20g part can stop a multi-million dollar production line. While typically dispatched as part of a larger order, we can provide rapid global shipping via DHL, FedEx, or UPS to ensure you receive the Siemens 6ES7390-0AA00-0AA0 as quickly as possible to restore your system’s communication.

Why Choose Goldrayline?

Sufficient Inventory & Stable Resources

We maintain ample stock and stable supplier resources to ensure quick order fulfillment and minimize operational downtime.

1-Year Warranty

We stand behind the reliability of our genuine Siemens products with a comprehensive 1-year warranty for complete peace of mind.

Competitive Pricing & Expert Support

Access transparent pricing and direct technical assistance from our certified engineers for seamless integration.

Fast Shipping

Orders typically shipped within 3-7 days, significantly reducing your waiting time for critical components.

Service Information

Payment

Acceptable payment methods include: bank transfer, paypal, Alipay collection, wechat collection, L/C collection, AliExpress online payment, etc

Fees for various collection methods:

Paypal : 5%

Bank Transfer: $35~$55

Alipay and wechat pay : for free

AliExpress online payment: 10%

eBay payment online: 15%

L/C handing fee : $500~$650

Returns Policy

At GoldRayline, we stand by our products with a No-Hassle 15-Day Returns Policy. If you’re unsatisfied for any reason, simply contact our dedicated Customer Support Team at [email protected] within 15 days of delivery for a full refund or exchange.

Key Terms:
Quick Processing: Refunds issued within 5 business days of receiving returned items.
Condition: Products must be unused, in original packaging, and include proof of purchase.
Support: Our team assists with returns tracking and resolves issues promptly.
Shop confidently—your satisfaction is our priority.

After-Sales Support

Contact Support: Reach out via our dedicated after-sales email at [email protected]. Include the product’s alarm code or clear photos/videos of the issue for faster resolution.
Swift Resolution: Our GoldRayline After-Sales team will review your case and contact you within 24 hours to provide tailored solutions, including repair, replacement, or refund, based on the fault assessment.

Shipping

In most cases, orders can be shipped within a week;

We provide tailored shipping solutions, including UPS, FedEx, DHL, and AliExpress Standard Shipping, based on customer requirements.

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Gold Rayline is not an authorized distributor, reseller, or representative of any products displayed on this website. All trademarks, logos, and brand names are the exclusive property of their respective owners. Product references are for identification purposes only and do not imply endorsement, affiliation, or authorization.

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