Product Category

Got any Questions? Call us Today!


Or leave us a message

Online Message

4 Port Dry Contact to Fiber Optic Converter

View : 1,498
Type : Dry Contact Closure over Fiber
Description :

The dry contact to fiber optic converter provides 4-channel unidirectional dry contact or 2-channel bidirectional dry contact on optical fiber transmission.


The dry contact to fiber optic converter provides 4-channel unidirectional dry contact or 2-channel bidirectional dry contact transmission over optical fiber. It solves problems related to electromagnetic interference, ground loop interference, and lightning damage, thereby improving the reliability, security, and confidentiality of data communication. It can be widely used in various industrial control, process control, and traffic control applications, and is especially suitable for use in departments and systems such as banks, power supply, and those that have special requirements for the electromagnetic interference environment.


dry contact to fiber converter


● The digital signal interface supports two types of signal relays: dry contact relays that support signal relays and wet contact (pulse) relays that support opto-MOS relays.

● The digital signal can be configured as 1 channel unidirectional/2 channels unidirectional/4 channels unidirectional/1 channel bidirectional/2 channels bidirectional mode.

● It can automatically detect the status of the input digital signal, whether it is normally open or normally closed. The output digital signal will be in the same status as the input signal, which makes it convenient for engineering commissioning.

● It can maintain stable output digital signals for all other channels even when it is powered on or when there is no fiber optic cable plugged in, ensuring that they will not switch on or off randomly.

● Each channel has indicator lights for open and closed digital signal states.

● The digital signal interface is designed to meet the IEC61000-4-5 (10/700μS) standard for lightning protection, with a differential mode surge immunity of 6KV with a 2Ω impedance and a common mode surge immunity of 6KV with a 2Ω impedance.


● Fiber

Optical Fiber: Single/Dual fiber

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

Wavelength: 850nm/1310nm Multi-mode; 1310nm/1550nm Single-mode

Transmission Distance without Relay: 20~120Km

Typical transmission power:

Single-mode 1310/1550nm: ≥-9dBm

Multi-mode 850nm: -18dBm

Multi-mode 1310nm: -25dBm

Reception sensitivity range: -28dBm~-40dBm


● Dry Contact

Interface type: Signal relay interface

Response time: < 1.2ms

Digital signal output: 30VDC/0.5A

Maximum switching frequency: 50Hz


● Pulse/Wet Contact

Interface type: Opto-MOS relay interface

Response Time: < 0.5ms

Digital signal output: 0-VCC/0.12A (VCC is the power supply voltage of the device)

Maximum switching frequency: 50Hz

Output surge protection: TVS + TSS 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

4-channel dry contact to fiber

Port Description

4*dry contact, 1*optical fiber

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-pin 5.08mm pitch pluggable terminal block

Product Size

110mm(L) x 86mm(W) x 40.5mm(H)

Installation method: din rail, wall-mounted




application of dry contact to fiber


Leave a Message

If you are interested in any product, please contact us. We will introduce our products to you in more detail