Product Short Description
Product Name
Absolute Process Instruments API 4380GD Three-Way Isolated DC-to-DC Signal Transmitter.
Product Overview
The API 4380GD is a field-configurable signal isolation transmitter that performs isolation, conversion, and amplification of DC current and voltage signals. It eliminates ground-loop interference and common-mode noise, providing three-way complete isolation among input, output, and power supply circuits.
Description
Technical Specifications
- Manufacturer: Absolute Process Instruments Inc.
- Input: 0–20 mA or ±10 V DC (configurable)
- Output: 0–20 mA or ±10 V DC (configurable)
- Isolation strength: 2000 V
- Built-in loop excitation: 18 V DC unregulated
- Response time: <10 ms
- Operating temperature: -10 to 60 °C (some listings show -20 to 70 °C)
- Supply voltage: 9–30 V DC
- Mounting: chassis mount; termination: spring terminal
- RoHS status: non-compliant (per some distributors)
Functional Features
- On-site range configuration via rotary switch and slide switch
- Equipped with LoopTracker status indicator LED
- Built-in output test button
- Three-way optical isolation
- Supports passive sensor power supply
- Compact plug-in housing design; effectively suppresses ground-loop noise
Application Scenarios
Industrial process signal isolation/conversion, signal conditioning for data acquisition systems, elimination of ground-loop interference for field instruments, chemical industry, water treatment, factory automation signal matching, and sensor signal isolation transmission.
Performance Parameters
High-linearity signal conversion; long-term stable drift control; compatible with most standard industrial process signal ranges; 2000 V isolation; <10 ms response time.
Material Composition
Compact plug-in housing with spring-terminal block, optical isolators for three-way isolation, and signal-conditioning circuitry (specific PCB laminate not specified).
Structural Characteristics
Chassis-mount package with spring terminals; plug-in housing for DIN-rail or panel mounting; front-accessible configuration switches and LEDs.
Working Principle
Accepts a DC current or voltage input, optically isolates the signal across 2000 V barriers (input/output/power mutually isolated), converts/amplifies to the configured output range (0–20 mA or ±10 V), and drives the load while rejecting ground-loop and common-mode noise.
Installation Requirements
Mount to chassis or DIN-rail adapter; wire input, output, and power to spring terminals; set input/output range with rotary/slide switches before applying power; observe 9–30 V DC supply polarity.
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