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16-Channel 4-20mA Analog to Fiber Converter

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Type : 4-20ma Analogue to Fiber Converter
Description :

This product adopts large-scale FPGA design and original technology, and can support 1~16 channels of analog signals (current/voltage) to optical fiber relay at the same time.


This product adopts large-scale FPGA design and original technology, and can support 1 ~ 16 channels of analog signals (current/voltage) to optical fiber relay simultaneously. The device adopts dual power supply, a high-performance FPGA programmable device, no MCU processing, high-speed conversion, a sampling frequency that can reach 20kHz, and 12 bit AD conversion chip, which solves the problems of electromagnetic interference, ground ring interference, and lightning-damage, greatly improves the reliability, safety, and confidentiality of control signal, and solves the problem of Limited cable transmission distance.


4-20ma to fiber


The device is paired, with the local signal input, and the opposite signal output; 

Support 4~20mA, 1-16 way current; or support 0~10V/0~5V, 1-16 way voltage; 16 channels of analog input and output can be combined arbitrarily;

16-channel analog AD/DA channel uses FPGA parallel read and write, non-MCU sequential read and write mode, each channel analog delay <0.1ms;

Each analog quantity reads high-speed sampling data through FPGA, and the sampling rate is 20K times/second, which is much higher than similar products in the market;

After the fiber at the analog output end is broken or the input end equipment is powered off, the analog output maintains the value before the nearest fiber break, and is set to be turned on with the dip switch. When this function is not turned on, the analog after fiber break is 0ma, or 0V;

Multimode fiber/single mode fiber is optional, multimode can transmit 2KM, the single mode can transmit 20KM, ST/SC/FC interface is optional;

Signal failure protection function; display of electrical interface and fiber running status in all directions;

4-20ma interface anti-radar to IEC61000-4-5 (8/20μS) differential mode: 6KV, impedance (2Ω); common mode: 6KV, impedance (2Ω) standard

Support wide range of AC and DC input, support internal isolation, redundant dual power input, power supply overload protection, anti-reverse protection

Meet the requirements of industrial four-level electromagnetic compatibility;

Super lightning protection function: lightning protection, anti-induction high voltage, anti-surge, etc.;

No fan to efficiently dissipate heat and reduce repair time;

IP40 enclosure protection level, able to withstand the test of harsh environments;

Rail or wall mounting;

Wide temperature type: working temperature -40 ° C ~ +85 ° C;

All models are tested by 100% baking machine, the warranty period is 5 years.


● Fiber          

Optical port: 1

Optical fiber: single fiber and double fiber

Fiber Interface: FC/SC/ST/LC (SFP)

Wavelength: 850nm/1310nm multimode; 1310nm/1550nm single mode

No relay transmission distance: 20~120Km

Typical transmit power:

    Single mode 1310/1550nm: ≥-9dBm

    Multimode 850nm: -18dBm

    Multimode 1310nm: -25dBm

Acceptable sensitivity range: -28dBm~- 40dBm  


● Current Analog    

Input and output range: 0~20mA (including 4~20mA)

Resolution: 12 digits

Sampling rate: 20K times/sec

Time delay: <0.1ms

Maximum load capacity: 600Ω

Input resistance: 125Ω

Accuracy: 0.4% (normal temperature)  


● Voltage Analog     

Input and output range: 0~10V (including 0~5V)

Resolution: 12 digits

Sampling rate: 20K times/sec

Time delay: <1ms

Maximum load capacity: 600Ω

Input resistance: 100ΚΩ

Accuracy: 0.4% (normal temperature)


● Working Environment   

Working temperature: -40 ° C – +85 ° C

Storage temperature: -40 ° C – +85 ° C

Working humidity: 0% – 95% (no condensation)

MTBF: >100,000 hours


Product Model


Function Description

Simultaneous transmission of 16 analog interfaces on the fiber

Port Description

1 fiber interface; 16 analog interfaces

Power Supply

Redundant dual power input: DC12-48V power consumption <5W overload protection: support; reverse connection protection: support; redundancy protection: support

Access terminal: 4-core 5.08mm pitch plug-in terminal

Housing: IP40 protection grade, aluminum alloy

Installation method: rail mounting, wall mounting

Product Size

Dimensions: 133mm (length) x 120mm (width) x 50.0mm (height)




application of 4-20ma to fiber


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