FAS FAS-113AD

Description

Product Overview

FAS FAS-113AD is a DIN rail mounted loop-powered analog signal isolation converter designed for industrial field signal transmission isolation. It receives passive 4–20 mA analog current signals from field transmitters, completes full electrical isolation and signal linear transmission, and outputs standard isolated 4–20 mA analog signals to DCS/PLC analog acquisition cards. The module eliminates ground loop interference, suppresses surge voltage and electromagnetic noise, and ensures accurate signal transmission in long-distance field wiring scenarios. It adopts loop-powered design without independent external auxiliary power supply, simplifying on-site wiring layout.

Technical Specifications

• Overall Dimension: 115 mm × 22.5 mm × 98 mm standard thin DIN rail module size
• Net Weight: 0.09 kg
• Power Supply Mode: Loop-powered, powered by input side 4–20 mA signal loop
• Input Signal Range: Passive 4–20 mA two-wire transmitter current signal
• Output Signal Range: Isolated standard 4–20 mA linear analog current signal
• Galvanic Isolation Strength Between Input and Output: 2500 V AC reinforced isolation
• Conversion Basic Accuracy: ±0.1% full scale
• Response Time of Signal Conversion: ≤ 150 μs
• Maximum Load Resistance of Output Side: 600 Ω
• Operating Temperature Range: -20 °C to +65 °C
• Storage Temperature Range: -40 °C to +85 °C
• EMC Compliance Standard: EN 61000-6-2 industrial environment anti-interference standard
• Mounting Standard: 35 mm standard DIN rail mounting

Function Features

1. Loop-powered design, no independent 24 V DC auxiliary power wiring required for field installation
2. 2500 V AC reinforced galvanic isolation completely cuts off ground loop current between field and control room
3. Linear one-to-one conversion of 4–20 mA analog signal without signal attenuation or distortion
4. Built-in bidirectional surge protection circuit to resist field wiring induced lightning transient surge voltage
5. Ultra-thin 22.5 mm narrow body structure, high-density multi-module stacked installation on single DIN rail
6. Hardware linear correction circuit to compensate signal conversion deviation under wide temperature fluctuation
7. No zero and span drift adjustment required after factory calibration, plug-and-play field deployment

Performance Parameters

• Temperature drift within full operating temperature window: ≤ ±0.005% full scale / °C
• Long-term stability drift per year: ≤ ±0.04% full scale
• Maximum signal transmission error under full load resistance: ≤ ±0.12% full scale
• Mean Time To Failure (MTTF): > 1,650,000 hours under rated working environment
• Continuous operation duty cycle: 100% 24/7 long-term stable transmission

Material Composition

• Main Circuit Board: UL94-V0 FR4 flame-retardant thin printed circuit board
• Outer Housing: Black flame-retardant PA66 plastic thin DIN rail shell
• Isolation Component: High-performance reinforced isolation transformer
• Surge Protection Components: Gas discharge tube + TVS bidirectional surge suppression array
• Terminal Blocks: Nickel-plated copper alloy small-pitch screw terminals
• DIN Rail Lock Buckle: Elastic PA66 plastic integrated lock structure

Structural Characteristics

• Ultra-narrow single-width DIN rail integrated structure, occupies only 22.5 mm horizontal cabinet space per unit
• Front panel two groups of independent terminal blocks, separated input wiring terminals and output wiring terminals
• Internal isolation transformer placed in independent shielding cavity to avoid signal crosstalk between input and output
• Bottom integrated elastic DIN rail lock buckle, one-hand quick installation and disassembly without tools
• Fully sealed shell structure IP20 dust protection grade for cabinet internal installation
• Compact internal circuit layout without air ventilation gap requirement between adjacent modules

Working Principle

The passive 4–20 mA signal loop from field transmitter provides operating energy for FAS-113AD internal circuit. Input current signal flows into isolation transformer primary winding; electromagnetic isolation transmission is realized through magnetic field coupling without direct electrical connection between input and output sides. The secondary winding circuit restores linear 4–20 mA standard current signal and outputs to control room PLC/DCS analog acquisition cards. Built-in surge protection components absorb instantaneous high-voltage surge on field wiring to avoid breakdown of isolation circuit. Temperature compensation circuit automatically corrects conversion gain deviation caused by ambient temperature change, ensuring output signal linear accuracy within full working temperature range. Reinforced isolation transformer eliminates potential difference ground loop current between field ground and control room ground, completely solving measurement fluctuation fault of analog signals.

Advantage Highlights

1. Loop-powered structure saves field power cable laying work and reduces on-site wiring engineering cost
2. Ultra-narrow body realizes high-density multi-signal centralized isolation layout in limited cabinet space
3. 2500 V AC high isolation voltage adapts long-distance field wiring with large ground potential difference
4. Built-in lightning surge protection eliminates signal damage risk caused by outdoor overhead transmitter wiring
5. Wide -20 °C low-temperature operating range suitable for northern cold climate outdoor control cabinets
6. Factory pre-calibration plug-and-play design eliminates on-site secondary calibration labor cost

Applicable Industries

Oil & gas field remote transmitter signal isolation, chemical plant long-distance analog signal transmission, water supply pipeline flow level monitoring system, wind farm field sensor signal conditioning, mining underground process parameter acquisition system

Installation Requirements

1. Direct snap mounting on standard 35 mm top-hat DIN rail inside IP20 industrial control cabinet
2. No reserved ventilation gap required between adjacent FAS-113AD modules for dense stacking installation
3. Input side wiring connected to two-wire passive field transmitter, output side connected to DCS analog input card
4. All signal cables use shielded twisted pair cable, shield layer single-end grounded only at control cabinet side
5. Output side load resistance must not exceed rated maximum 600 Ω to avoid signal compression distortion
6. Cabinet internal ambient humidity kept at 5%–90% non-condensing, no corrosive volatile gas

Usage Precautions

1. Do not connect active powered transmitter directly to input terminal; only passive loop 4–20 mA signal access is allowed
2. If output signal deviation occurs, check output side load resistance value first instead of replacing module
3. Avoid installing the module within 20 cm range of inverter, high-power contactor and other strong interference equipment
4. Regular annual signal accuracy spot check with standard 4–20 mA signal calibrator for heavy industrial sites
5. Spare isolation modules stored in dry anti-static packaging under constant 15–25 °C temperature
6. Condensation on module shell surface will cause internal insulation performance decline and signal drift failure