API 7500G - DC to Frequency Isolated Transmitter - Field Configurable

The API 7500G DC to Frequency Isolated Transmitter is a versatile, field-configurable signal conditioning module designed to convert DC analog signals into frequency outputs for use in industrial automation, process control, and data acquisition systems. Engineered for flexibility, reliability, and ease of setup, the 7500G provides accurate, isolated signal conversion across a wide range of applications.

With full 3-way isolation, configurable input and output ranges, and rugged industrial design, the API 7500G is an ideal solution for integrating analog signals into systems that require frequency-based inputs, including PLCs, counters, totalizers, and digital control systems.

Convert DC Signals to Frequency with Precision

The API 7500G is designed to convert DC voltage or current signals into a proportional frequency output. This allows analog signals from sensors, transmitters, or control systems to be easily interfaced with equipment that operates on pulse or frequency inputs.

Common conversion applications include:

• 4–20 mA to frequency conversion

• Voltage to pulse output conversion

• Analog signal integration into PLCs and digital systems

• Signal scaling for counters and totalizers

This functionality is essential in systems where frequency signals are preferred for noise immunity, long-distance transmission, or compatibility with existing hardware.

Field Configurable for Maximum Flexibility

One of the key advantages of the API 7500G is its field configurability. The unit allows users to easily select input and output ranges without requiring specialized tools or factory calibration.

Configuration features include:

• Multiple selectable input ranges

• Adjustable output frequency scaling

• Easy setup via switches and calibration adjustments

• Fine-tuning using zero and span controls

This flexibility enables the transmitter to be quickly adapted to a wide variety of applications, reducing setup time and simplifying system integration.

Full 3-Way Isolation for Signal Integrity

The API 7500G provides full isolation between input, output, and power circuits, helping to protect sensitive equipment and ensure accurate signal transmission.

• Isolation rating: 2000 VRMS (input to output, input to power, output to power)

Benefits of isolation include:

• Elimination of ground loops

• Improved noise rejection

• Enhanced system reliability

• Protection against voltage transients

This makes the 7500G particularly valuable in electrically noisy industrial environments.

High Accuracy and Stable Performance

The API 7500G is designed to deliver accurate and repeatable signal conversion:

• Accuracy: Better than ±0.2% of span

• Repeatability: Better than ±0.8%

This level of performance ensures that the output frequency signal accurately reflects the input analog signal, supporting precise monitoring and control.

Wide Input Compatibility

The API 7500G supports a broad range of DC input signals, making it compatible with many common industrial sensors and transmitters.

Typical inputs include:

• 0–10 VDC

• 1–5 VDC

• 0–5 VDC

• 4–20 mA

This versatility allows the unit to be used in a wide range of systems without requiring additional signal conditioning.

Frequency Output for Digital Systems

The output of the API 7500G is a frequency signal proportional to the input, which can be used with:

• PLC frequency inputs

• Counters and totalizers

• Digital control systems

• Data acquisition equipment

Frequency outputs are often preferred in industrial environments due to their resistance to electrical noise and ability to maintain signal integrity over long distances.

Built-In Loop Power Supply

The API 7500G includes an integrated loop power supply, simplifying system design and reducing the need for external power sources.

• Provides power for passive input devices

• Reduces wiring complexity

• Eliminates the need for additional power supplies

This feature is especially useful when working with sensors such as transmitters or flow meters that require loop power.

Rugged Industrial Design

The API 7500G is built for reliable operation in demanding environments:

• Wide operating temperature range

• Durable construction for long-term use

• Compact design for panel or DIN rail mounting

Its robust design ensures consistent performance in industrial settings where reliability is critical.

Easy Installation and Setup

The transmitter is designed for straightforward installation using an industry-standard 8-pin socket (sold separately).

Setup process includes:

• Selecting input and output ranges via switches

• Adjusting zero and span for calibration

• Verifying operation using built-in indicators

The simplified setup process allows for quick deployment and minimal downtime.

Diagnostic Features for Easy Troubleshooting

The API 7500G includes built-in diagnostic tools that help simplify commissioning and troubleshooting:

• Functional test capability for output verification

• Visual indicators for signal status

• Adjustable sensitivity to reduce noise and false signals

These features allow users to quickly identify issues and verify system performance.

Typical Applications

The API 7500G is used in a wide range of industrial and process control applications:

• Converting analog signals to frequency for PLC inputs

• Driving counters and totalizers

• Flow measurement and monitoring systems

• HVAC and building automation systems

• Industrial automation and process control

Its flexibility and reliability make it a valuable component in many signal conversion applications.

Why Use a DC to Frequency Transmitter?

Converting analog signals to frequency offers several advantages:

• Improved noise immunity compared to analog signals

• Better signal integrity over long distances

• Compatibility with digital and counting devices

• Simplified integration with PLC systems

The API 7500G provides a reliable way to achieve this conversion while maintaining accuracy and stability.

Why Choose the API 7500G?

The API 7500G stands out as a high-performance signal conditioning solution due to its:

• Field-configurable input and output ranges

• Full 3-way isolation for noise reduction and protection

• High accuracy and repeatability

• Wide input compatibility

• Frequency output for digital system integration

• Built-in loop power supply

• Rugged industrial design

• Easy installation and setup

A Flexible Solution for Signal Conversion

The API 7500G DC to Frequency Isolated Transmitter provides a reliable and flexible solution for converting analog signals into frequency outputs. Its combination of accuracy, configurability, and isolation makes it an ideal choice for engineers and system integrators working in industrial environments.

Optimize Your Signal Conditioning System

Whether you are integrating sensors into a PLC system, monitoring process variables, or designing a control system, the API 7500G offers the performance and flexibility needed to get the job done.

Contact us today to learn more or configure a solution tailored to your application.