Siemens 6ES7392-1AJ00-0AA0 SIMATIC S7-300 series

Siemens 6ES7392-1AJ00-0AA0 Detailed Analysis

1. Product Positioning and Series

Link Module of Siemens SIMATIC S7-300 series, specifically Front Connector.

It is mainly used for electrical connection of S7-300 signal module (SM), provides interface between external cable and internal circuit of module, and is an essential component in hardware configuration.

2. Key technical parameters

Parameter Details

Order number 6ES7392-1AJ00-0AA0

Product type Front connector (with screw terminals)

Applicable modules - Digital input module (DI): such as 6ES7321-1BL00-0AA0

- Digital output module (DO): such as 6ES7322-1BL00-0AA0

- Some analog modules (compatibility needs to be confirmed)

Number of terminals 40 pins (corresponding to 20 channels, each channel contains 2 terminals for signal input/output and common terminals)

Connection method Screw connection (tighten the terminal with a screwdriver, suitable for fixing hard wires or cables with cold-pressed terminals)

Rated voltage - Direct current (DC): maximum 30V

- Alternating current (AC): maximum 250V (depending on the type of module connected)

Rated current Maximum 2A (continuous current) for a single terminal

Mechanical characteristics - Material: flame-retardant plastic (compliant with UL94 V-0)

- Protection level: IP20 (for use in control cabinets only)

Certifications: CE, UL, CSA, etc.

3. Functions and features

(1) Electrical connection core

As a bridge between the signal module and external devices (such as sensors and actuators), it is directly connected to the socket on the back of the module through a 40-pin plug to transmit electrical signals.

Each channel contains two terminals (such as "signal +" and "common"), supporting two-wire or three-wire sensor connections.

(2) Advantages of screw terminals

High reliability: The screw fastening method ensures that the cable connection is firm and not easily detached due to vibration or external force, suitable for industrial environments.

Strong flexibility: Supports a variety of wire diameters (such as single-strand or multi-strand wires from 0.2 mm² to 2.5 mm²), which can be connected directly or through cold-pressed terminals.

(3) Error-proof design

The interface between the front connector and the signal module has a unique correspondence (such as the pin definition matches the module channel) to avoid short circuits or module damage due to incorrect insertion.

Some models come with coding keys (need to match the coding slot of the module) to further ensure correct installation.

(4) Maintenance convenience

Support online replacement: the front connector can be removed without disconnecting the module power supply (the screws must be loosened first), which is convenient for maintenance or cable replacement.

The terminal block can be marked (such as using label paper or numbered sleeves) to facilitate cable management and troubleshooting.