OVERVIEW
• DC Voltage Input: 0-50 mV to 0-10 V
• DC Bipolar Voltage Input: +/- 50 mV to +/- 10 V
• DC Current Input 0-1 mA to 20 mA
• DC Output: 0-1 V, 0-5 V, 0-10 V, +/- 5 V, +/- 10 V, 4-20 mA, etc.
• Field-Configurable by Use
Typical applications include signal isolation, signal conversion, signal boosting or a combination of the three.
The optical isolation between input and output makes this module useful for ground loop elimination, common mode signal rejection or noise pickup reduction. The module power supply is isolated, resulting in full 3-way (input, output, power) isolation.
The API 4380 G can be field-configured via external rotary and slide switches.
Most common ranges are built-in, and can be selected from the table on the module, however virtually unlimited combinations are possible. Consult the factory for assistance with special ranges.
API exclusive features include two LoopTracker LEDs and a Functional Test Pushbutton. The LoopTracker LEDs (Green for input, Red for output) vary in intensity with changes in the process input and output signals. Monitoring the state of these LEDs can provide a quick visual picture of your process loop at all times. The functional test pushbutton provides a fixed output (independent of the input) when held depressed. The test output level can be field-adjusted via a multiturn potentiometer.
Both the LoopTracker LEDs and functional test pushbutton greatly aid in saving time during initial startup and/or troubleshooting. The built-in 18 VDC unregulated loop excitation power supply can be used to power passive input devices.
The API 4380 G plugs into an industry standard 8-pin octal socket sold separately. Sockets API 008 and finger-safe API 008 FS allow either DIN rail or panel mounting.
Options:
TECHNICAL SPECIFICATIONS
Input
Field Rangeable; Via external rotary & slide switches
Voltage: 0-50 mVDC to 0-10 VDC
or
Bipolar Voltage: +/- 50 mVDC to +/- 10 VDC
or
Current: 0-1 mADC to 0-20 mADC
Output
Field Rangeable; Via external rotary & slide switches
Voltage: 0-1 VDC to 0-10 VDC
or
Bipolar Voltage: +/- 1 VDC to +/- 10 VDC
or
Current (20 V compliance): 0-1 mADC to 0-20 mADC
Isolation
Full 2000 Vrms Input/Output/Power Isolation
Features
1 minute setup for hundreds of I/O ranges
I/O LoopTracker LEDs
Output test button
18 V loop power supply
Uses API-008 8-pin socket
115 VAC powered
D option for 9-30 VDC power
DF option for Fast Response Time
Applications
Isolate, convert, boost, rescale process signals
Interface process signals with panel meters, recorders, recorders, data acquisition systems, PLCs, DCS & SCADA systems
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Field Configurable Signal Conditioning for Industrial Process Control
The API 4380G DC to DC Isolated Transmitter is a high-performance, field-configurable signal conditioning module designed to isolate, convert, scale, and retransmit DC voltage and current signals in industrial environments. Built for flexibility and ease of integration, the 4380G allows users to configure a wide range of input and output signal combinations with minimal setup time.
Engineered with full 3-way isolation, high accuracy, and robust industrial construction, the API 4380G provides reliable signal conditioning for applications involving PLCs, DCS systems, SCADA platforms, data acquisition equipment, and process instrumentation.
Convert, Isolate, and Scale DC Signals with Confidence
The API 4380G accepts a DC voltage or current input and provides a corresponding isolated DC output signal that is linearly proportional to the input. This allows users to convert one signal type to another, rescale signal ranges, or isolate sensitive equipment from electrical noise and ground loops.
Typical signal conversions include:
4–20 mA to 0–10 VDC
0–10 VDC to 4–20 mA
±10 VDC to 0–20 mA
Low-level millivolt signals to usable control signals
This versatility makes the 4380G an essential component in systems requiring precise signal conditioning and reliable data transmission.
Wide Input and Output Range Capability
The API 4380G supports a broad range of DC input and output signals, allowing it to interface with virtually any industrial sensor or control system.
Input Ranges:
Voltage: 0–50 mV up to 0–10 VDC
Bipolar Voltage: ±50 mV up to ±10 VDC
Current: 0–1 mA up to 0–20 mA
Output Ranges:
Voltage: 0–1 VDC up to 0–10 VDC
Bipolar Voltage: ±1 VDC up to ±10 VDC
Current: 0–2 mA up to 4–20 mA
This wide-ranging capability allows a single module to be used across multiple applications, reducing the need for specialized signal conditioners.
Field Configurable for Fast Setup
The API 4380G is designed for quick and easy configuration directly in the field. Using external rotary and slide switches, users can select input and output ranges in minutes without the need for specialized programming tools.
Key configuration features include:
External switches for range selection
Hundreds of possible input/output combinations
Easy-to-follow range tables on the module
Fine adjustment via zero and span controls
This “one-minute setup” capability simplifies installation and minimizes downtime during commissioning.
Full 3-Way Isolation for Superior Signal Integrity
The API 4380G provides full isolation between input, output, and power circuits, ensuring clean signal transmission and protection against electrical interference.
Isolation rating: 2000 VRMS minimum
Input-to-output, input-to-power, and output-to-power isolation
Benefits of full isolation include:
Elimination of ground loops
Improved common-mode noise rejection
Protection of sensitive instrumentation
Enhanced system stability
This makes the 4380G ideal for use in electrically noisy environments or systems with long signal runs.
High Accuracy and Stable Performance
The API 4380G is engineered to deliver precise and reliable signal conversion:
Linearity: Better than ±0.1% of span
Temperature stability: ±0.02% of span per °C
Output ripple and noise: Less than 10 mVRMS
These performance characteristics ensure accurate signal reproduction, even in applications where precision is critical.
Built-In Loop Power Supply
The module includes an integrated 18 VDC loop power supply, which can be used to power passive input devices such as transmitters and sensors.
18 VDC nominal output
Up to 25 mA current capacity
This feature simplifies system design by eliminating the need for additional external power supplies.
Fast Response Options for Dynamic Applications
The API 4380G offers flexible response time options to meet different application requirements:
Standard response time: 100 milliseconds
High-speed option (DF): 1 millisecond
This allows the module to be used in both steady-state process monitoring and fast-changing signal environments.
Built-In Diagnostics for Easy Troubleshooting
The API 4380G includes several built-in features that simplify system setup and troubleshooting:
LoopTracker® LEDs
Green LED indicates input signal activity
Red LED indicates output signal activity
Brightness varies with signal level
Functional Test Pushbutton
Allows manual output testing
Adjustable from 0–100% of output span
Useful for commissioning and diagnostics
These features provide real-time visual feedback and help reduce troubleshooting time during installation and operation.
Rugged Industrial Design
The API 4380G is built for reliable operation in demanding environments:
Operating temperature: –10°C to +60°C
Compact design for panel or DIN rail mounting
Industry-standard 8-pin octal socket compatibility
Its durable construction ensures long-term performance in industrial automation and process control systems.
Typical Applications
The API 4380G is widely used in applications requiring signal isolation, conversion, and scaling:
PLC and DCS signal interfacing
SCADA system integration
Data acquisition systems
Industrial process monitoring
HVAC and building automation
Flow measurement and control systems
Example applications include converting ±10 V flow signals to 4–20 mA for long-distance transmission or isolating sensor signals to eliminate ground loop interference.
Why Use a DC to DC Isolated Transmitter?
In industrial systems, signal conditioning is essential for ensuring accurate and reliable data transmission. A DC to DC isolated transmitter like the API 4380G provides:
Signal isolation for noise reduction
Signal conversion between incompatible systems
Signal scaling for measurement accuracy
Protection of equipment from electrical faults
Why Choose the API 4380G?
The API 4380G stands out as a versatile and dependable signal conditioning solution due to its:
Wide input and output range flexibility
Field-configurable setup for quick installation
Full 3-way isolation for superior protection
High accuracy and stability
Built-in loop power supply
Diagnostic LEDs and test functionality
Rugged industrial design
A Versatile Solution for Industrial Signal Conditioning
The API 4380G DC to DC Isolated Transmitter provides a flexible, reliable solution for converting and isolating process signals in industrial environments. Its combination of configurability, accuracy, and durability makes it an essential tool for engineers and system integrators.
Optimize Your Signal Conditioning System
Whether you are integrating sensors, upgrading control systems, or improving signal reliability, the API 4380G offers the performance and flexibility needed to ensure accurate and dependable operation.
Contact us today to learn more or configure a solution tailored to your application.