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2 Port Dry Contact Closure over Fiber Optic Converter

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Type : Dry Contact Closure over Fiber
Description :

The dry contact closure over fiber converter provides 2-channel unidirectional Dry contact or 1-channel bidirectional Dry contact on optical fiber transmission.


The dry contact closure over fiber converter provides 2-channel unidirectional Dry contact or 1-channel bidirectional Dry contact signals transmission over fiber optic. It solves the problems of electromagnetic interference, ground loop interference, and lightning damage, improves the reliability, security, and confidentiality of data communication. It can be widely used in various industrial control, process control, and traffic control fields, especially suitable for banks, power, and departments and systems with special requirements for electromagnetic interference environments.


dry contact to fiber converter


● The digital input/output interface supports two types of signal relays: dry contact relays that use electromagnetic contacts, and wet contact relays that use opto-MOS relays.

● It can support either 2 channels of unidirectional digital inputs or 1 channel of bidirectional digital input.

● 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 of the device is equipped with indicator lights to show the status of the digital signal, whether it is on or off.

● The digital input 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

Fiber type: Single/Dual fiber

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

Wavelength: 850nm/1310nm for multi-mode, 1310nm/1550nm for 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 to -40dBm


● Dry Contact

Interface type: Signal relay interface

Response time: < 1.2ms

Digital signal output: 30VDC/0.5A

Maximum switching frequency: 50Hz


● Wet Contact (Pulse)

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


Working Environment

Working temperature: -10°C ~ 50°C

Working Humidity: 5%~95 % (no condensation)

Storage temperature: -40°C ~ 80°C

Storage Humidity: 5%~95 % (no condensation)


Model Number


Function Description

2-channel unidirectional (1-channel bidirectional) dry contact to fiber

Port Description

1 Fiber Interface; 2 Dry Contact Interface

Power Supply

Power supply: AC180V ~ 260V; DC –48V; DC +24V

Power consumption: ≤10W


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




application of dry to fiber

Questions You May Ask

Q: How long is the lead time after placing an order?

A: The specific lead time will vary depending on the quantity and the product. Generally, it will be 3 to 5 days.


Q: What is the MOQ?

A: For most products we support sample order. 


Q: Can the logo be customized?

A: Yes, OEM is supported.


Q: How can I get a quote?

A: After you submit your inquiry and confirm the product specifications, we will provide you with a detailed quote as soon as possible


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