AL3406 Signal Isolation Module Inquiry Item

This AL3406 is an industrial signal isolation module, widely used in process instrument signal conditioning. It receives 4~20mA analog signal from field transmitters and outputs isolated 4~20mA signal to PLC or DCS system. It adopts complete galvanic isolation design between input, output and power supply, effectively eliminates ground loop interference and signal surge damage. It supports loop-powered or external 24VDC power supply, small DIN rail mounting structure, easy installation in control cabinet. It is suitable for chemical, power, water treatment, metallurgy and other occasions with many interference sources, and is a common matching spare part for pressure, temperature and flow instruments.

Specifications

Model: AL3406 Brand: Industrial signal isolator Signal range: 4~20mA Isolation mode: Input / output / power three isolation Power supply: 24VDC Installation: DIN 35mm rail mount Accuracy: ±0.1% FS Ambient temperature: -20℃ ~ +60℃ Certifications: CE

Components & Troubleshooting

Signal sampling circuit, isolation transformer, signal conversion chip, status indicator LED, plastic housing, DIN rail buckle, terminal block. Common faults: no output signal, signal reading drift, output jitter, isolation breakdown, terminal poor contact.

Disclaimer

This spare part shall be installed, calibrated and maintained by qualified instrument technicians. Confirm signal wiring direction before power on.