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Dry Contact Closure over Fiber Converter With Alarm Output

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Type : Dry Contact Closure over Fiber
Description :

This product provides 14 channels of unidirectional dry contact or 7 channels of bidirectional dry contact for transmission in optical fibers and provides one alarm output.


This dry contact over fiber converter provides 14-channel unidirectional dry contact or 7-channel bidirectional dry contact for transmission in optical fiber, and provides one alarm output. It solves the problems of electromagnetic interference, ground ring interference and lightning damage, improves the reliability, security and confidentiality of data communication, and can be widely used in various industrial control, process control and traffic control, especially suitable for banks, power and Departments and systems with special requirements for electromagnetic interference environment.


Dry Contact Closure over Fiber Converter


● Integrated circuits based on independent intellectual property rights;

● It can support unidirectional 14-channel dry contact and bidirectional 7-channel dry contact, and provide one alarm output. When the optical fiber is broken or the power is off, one dry contact (the 16th) dry contact output is closed;

● Each channel has an indicator light indicating the dry contact is on and off;

● Automatic detection of the input dry contact on and off, when the state of the input, the state of the dry contact output, which is convenient for project opening;

● When the dry contact is turned on or the optical fiber is not connected, its dry contact state is stable, and there will be no disorderly action state;

● The normally open and normally closed state of the output dry contactcan be set through the DIP switch when the fiber is not connected;

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

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

● Comply with industrial level 4 electromagnetic compatibility requirements;

● Super lightning protection function: lightning protection, anti-inductive high voltage, anti-surge, etc.

● Fanless efficient heat dissipation, reducing repair time;

● DC 9-55V DC power supply or AC9-50V AC power supply, no positive and negative poles.


● Fiber

Optical port: 1

Optical Fiber: Single/Dual fiber

Fiber interface: SC/FC/ST/LC(SFP) Optional

Wavelength: 850nm/1310nm Multimode;1310nm/1550nm Single mode

Relay-free transmission distance: 0~80Km

Typical transmit power: single mode 100uw — 0.93mw


● Dry Contact Interface  

Output interface type:

Dry contact: signal relay dry contact output;

Pulse amount (wet contact): Optical MOS relay output, 0-VCC (VCC is the power supply voltage of the machine)

Response time dry contact output: <1.2ms; wet contact output <0.6ms

Switch signal dry contact output 30VDC/0.5A; wet contact output: 245VDC/0.12A

Maximum switching frequency: 50HZ

Output surge protection: dry contact output: none; wet contact output: TVS+solid discharge tube protection


● Environmental Index

Working Temperature: -40℃—+85℃

Storage Temperature: -40℃—+85℃

Working Humidity: 0%—95% (non-condensing)

MTBF: >100,000 hours


Product Model


Function Description

Industrial rail type 14 channel Dry Contact and provides one alarm output optical terminal

Port Description

15 channels Dry Contact, 1 channel Optical Fiber Interface

Power Supply

Redundant dual power supply input DC9-48V, power consumption <5W

Overload protection: support; 

reverse polarity protection: support;

redundant protection: support

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

Product Size

Shell: IP40 protection grade, aluminum alloy material

Dimensions: 133mm(L) x 120mm(W) x 50.0mm(H)

Installation method: guide rail installation, wall-mounted installation




application of Dry Contact Closure over Fiber Multiplexer


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