Product Introduction

The Siemens Power Board C98043-A7004-L2 is an excitation board designed for the Siemens 6RA70 DC speed controller. Here are some of the key functions and features of the board:
Excitation Control
The C98043-A7004-L2 is mainly used to control the excitation of the DC motor to ensure that the motor obtains the appropriate excitation current under different operating conditions. This is essential to maintain motor performance and efficiency.

Analog Inputs and Outputs
The board provides two programmable analog inputs (0V to 10V, 0mA to 20mA), and two programmable analog outputs (0mA to 20mA). These inputs and outputs allow flexible communication and control with external devices.

Digital Inputs
The C98043-A7004-L2 also has six programmable independent digital inputs, which can be used to receive signals from various sensors or other digital devices.

Built-in protection function
The board has a built-in overcurrent protection function. When measuring current, if there is a sensor short circuit, the analog input I+ of the module 6ES7331-1KF0.-0AB0 will not be destroyed. In addition, there is a PTC element in front of each 50 ohm resistor to prevent the input channel of the module from being destroyed.

Parameter setting and optimization
The C98043-A7004-L2 supports parameter setting and optimization through software to adjust its performance according to specific application requirements. For example, parameters can be viewed and modified through the DriverMonitor software to solve possible faults.

Modular structure
The board adopts a modular structure, allowing users to flexibly configure according to specific application requirements. This design is not only easy to maintain, but also improves the scalability of the system.

Flexible configuration: With a modular structure, it allows the configuration to be highly flexible and can be set according to different needs.

Rich input and output interface
Digital input: It has six programmable independent digital inputs to meet a variety of control needs.

Analog input: There are two measurable analog inputs (0V to 10V, 0mA to 20mA), and it can also be used as the 7th/8th digital input, which increases the diversity of use.

Analog output: It has two programmable analog outputs (0mA to 20mA) to achieve different output functions.
Relay output: It has three programmable relay outputs (30VDC/5A, resistive load) to facilitate related control operations.

Motor operation advantages
Low noise operation: Low noise motor operation is achieved due to high pulse frequency, and it can be adjusted (if necessary, it can be derated) to reduce the impact of motor operation noise on the environment.
Motor protection function: It has motor and inverter protection functions to ensure the safe operation of motors and inverters and reduce the risk of failure.

Support for multiple operating modes
Main power supply operation: The drive can be connected to the main power supply (with external bypass circuit) to adapt to different power access requirements.
Low energy mode: It has a low energy mode, which can save energy while meeting specific operating requirements.
Detection function: It can detect the dry running state of the pump (belt fault detection), timely discover hidden faults, and improve the safety and reliability of equipment operation.

Convenient speed regulation function
Forward and reverse rotation are easy to achieve: variable frequency speed regulation can easily achieve forward and reverse rotation of the motor. Only by changing the switching sequence of the inverter tube inside the inverter, the output phase change can be achieved to avoid the burning of the motor due to improper phase change.

Good starting characteristics
The starting frequency is low and can be set: the variable frequency speed regulation system starts mostly from low speed, the frequency can be set arbitrarily, the acceleration and deceleration time is smooth, the starting current is small, and a higher frequency of start and stop operations can be performed to reduce the impact on the motor.
Low starting current: Through the soft start and soft shutdown of the inverter, the starting current can be reduced to 1.5-2 times the rated current when the motor starts. Compared with the starting current of 6 times the rated current flowing during general direct start, the load of the motor during frequent operation/stopping is greatly reduced.

Utilization of braking circuit: During braking, the inverter can use its own braking circuit to consume the energy of the mechanical load on the braking resistor, and braking can be achieved without adding an additional braking control circuit.
DC braking: The inverter also has a DC braking function. When braking is required, a DC voltage is applied to the motor for braking to meet different braking requirements.
Rebound braking: The inverter's rebound braking facilitates electric braking, further improving the convenience and effectiveness of braking.

Application areas
C98043-A7004-L2 is widely used in the industrial field, especially in applications where precise control of DC motor excitation is required. It is suitable for motors of various power levels, including high-power series-excited motors and separately-excited motors.

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