6ES7953-8LJ20-0AA0 SIEMENS Output module

Description

6ES7953-8LJ20-0AA0 SIEMENS Output module

Product Dimensions：

Product Description

The SIEMENS Output Module is an electronic assembly that converts the PLC’s internal logic signals into usable power signals for industrial actuators. It acts as a controlled switch or a variable signal generator.

Digital Output (DO) Modules control devices that require simple ON/OFF signals, such as indicator lights, contactors, and solenoid valves. They are characterized by their switching element (relay, transistor, or triac) and the voltage/current they can handle.

Analog Output (AO) Modules generate continuous, variable voltage or current signals (e.g., $0-10 text{V}$ or $4-20 text{mA}$) to control proportional devices like variable frequency drives, proportional valves, and analog meters. They are defined by their resolution, which determines the precision of the output signal.

Product Parameters

General parameters applicable to the Output Module category:

Product Advantages

1. Actuator Control: Provides the necessary power interface to control a wide variety of industrial loads directly from the PLC, simplifying wiring and reducing external relay requirements (especially for transistor outputs).

2. Integrated Protection: Features built-in short-circuit protection and thermal overload protection, safeguarding the module and the system electronics from field faults.

3. Advanced Diagnostics: Offers channel-specific diagnostics, such as monitoring for short circuits or open loads, which allows for fast isolation and identification of faults in the field wiring or the actuator itself.

4. High-Speed Switching: Transistor-based DO modules support extremely high switching frequencies, making them ideal for Pulse Width Modulation ($text{PWM}$) control or high-speed solenoid operation.

5. Precision and Resolution (AO): Analog Output modules provide high-resolution control, enabling fine adjustment of actuators like drives and proportional valves for high-quality process control.

Notes (Important Considerations)

• Load Sizing: Always ensure that the continuous current and inrush current of the connected actuator do not exceed the specified maximum load current for the module’s output channel.

• Output Type Selection (DO): Choose the correct output type: Relay for high current/voltage flexibility and AC/DC loads; Transistor for high-speed switching and DC loads; Triac for AC switching with frequent operation.

• Wiring and Isolation: Proper shielding and grounding are essential, especially for Analog Outputs, to prevent noise from interfering with the low-voltage control signal.

• Signal Scaling (AO): The software configuration in the PLC must accurately scale the CPU’s digital value into the desired physical output range ($text{V}$ or $text{mA}$) to ensure the actuator responds correctly.

• External Protection: While many modules have built-in protection, external fusing or circuit breakers on the field power supply may be required, depending on local standards and the module’s specifications.

Product Applications

Output Modules are used wherever the PLC needs to physically influence the external world:

• Machine Sequencing (DO): Controlling solenoid valves for pneumatic or hydraulic cylinders, motor contactors, and indicator lamps/horns.

• High-Speed Control (DO): Driving high-frequency devices like high-speed solenoids or controlling proportional valves using $text{PWM}$ signals.

• Variable Speed Control (AO): Sending command signals (e.g., $4-20 text{mA}$) to Variable Frequency Drives ($text{VFDs}$) to precisely set motor speed or torque.

• Proportional Control (AO): Controlling proportional valves for flow, pressure, or temperature regulation in process control systems.

• Instrumentation: Driving analog display meters or recorders that require a standard current or voltage signal.

Shipping Port: Xiamen, China

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