back

Contact Closure Over Fiber Converter 2 to 16 Channel Dry Contact / Relay over Fiber (Bidirectional or One-Way) 8 CC Bi-Directional

2 CC 4 CC 8 CC 16 CC 32 CC 2 CC Bi-Directional 4 CC Bi-Directional 8 CC Bi-Directional 16 CC Bi-Directional

Model: F-8CC-B-TxRx

Qty: 0

Price: $1,495.00

Availability:	In stock	Condition:	new
Shipping:	starting at $0.00	Warranty:	2Yrs

Quantity:

ask about product

send request

Description Features Drawings Models Accessories Specification Q&A Support

8 CC Bi-Directional model description

8 Relay Bi-Directional Contact closure over fiber in one direction

Description

The Thor Fiber Contact Closure over Fiber Converter enables reliable transmission of dry contact (relay), GPIO, and alarm signals over long distances using fiber optic cable.

This system converts electrical contact closures into optical signals for transmission over single-mode or multimode fiber, then converts them back to electrical signals at the receiving end. It is ideal for applications where traditional copper wiring is limited by distance, interference, or grounding issues.

Designed for industrial, security, and broadcast environments, this solution ensures noise immunity, electrical isolation, and stable signal delivery across distances up to tens of kilometers.

Available in 2, 4, 8, and 16 channel configurations, the system supports both one-way (simplex) and bidirectional (duplex) communication, making it flexible for monitoring and control applications.

Features

Transmit dry contact / relay / GPIO signals over fiber optic cable
Available in 2, 4, 8, and 16 channel versions
Supports one-way (simplex) or bidirectional (duplex) communication
Works over single-mode or multimode fiber
Long-distance transmission (up to 20–80 km depending on optics)
Immune to EMI / RFI interference
Provides full electrical isolation between endpoints
Plug-and-play operation (no configuration required)
Compact industrial-grade design
LED indicators for signal status and power

Applications

Security systems (alarm panels, sensors, door contacts)
Industrial automation and PLC control
Remote relay control systems
Access control systems
Traffic control and monitoring
Building management systems (BMS)
SCADA systems
Broadcast facility control signaling
Utility and power grid monitoring

Drawings

Model Selection

The base unit works for 20Km over single-mode fiber or 3000 feet of multimode fiber - ST/PC fiber connector

F-2CC-TX/RX 2 Contact closures over fiber transmitter/receiver kit 20Km

F-4CC-TX/RX 4 Contact closures over fiber transmitter/receiver kit 20Km

F-8CC-TX/RX 8 Contact closures over fiber transmitter/receiver kit 20Km

F-16CC-TX/RX 16 Contact closures or TTL over fiber transmitter/receiver kit 20Km

F-2CC-B-TX/RX 2 Contact closures over fiber transmitter/receiver kit 20Km

F-4CC-B-TX/RX 4 Contact closures over fiber transmitter/receiver kit 20Km

F-8CC-B-TX/RX 8 Contact closures over fiber transmitter/receiver kit 20Km

Other configurations :

F-XXCC-TX/RX-YY

XX- Number of contact closure channels 2, 4, 8, 16, 32

YY- Distance in Km 40, 80, 100,

Accessories & Upgrades

Specification

Electrical & Mechanical
Contact Rating: Output relay maximum switching voltage The maximum switching current of the output relay Mechanical durability of the output relay The maximum output power of the relay Input Power Requirements:		1A 120VAC, 1A 220AVC/30VDC, 3 A120VAC, 2 A120VAC, 5A 120VAC 240VAC/30VDC 5A 100,000,000 times 30W DC 5V@2A
Power Adapter:		AC 90V~240V
Power Consumption:		< 3W
Stand-Alone Dimensions:		104mm × 104mm × 28mm ( 1, 2, 4 channel ) (1Bi, 2Bi Channel) 114mm × 116mm × 28mm (8 and 16 channel) 114mm x 167mm x 28mm (4Bi, 8Bi channel) 445mm x 220mm x 44.5mm (32, 16Bi channel) 445 x 220mm x 89mm (64, 32Bi channel) 445mm x 220mm x 178mm (64Bi Channel)
Shipping Weight:		(includes Transmitter & Receiver ) 0.8kg or 1.5kg
Environmental
Operating Temperature:		-20°C ~ +75°C
Storage Temperature:		-20°C ~ +75°C
Storage Temperature:		-40°C ~ +85°C
Relative Humidity:		0% ~ 95% (non-condensing)
MTBF:		>100,000 hours

Notes:

The Optical Power Budget data fits Mulit-mode(62.5/125 μm), Single-Mode(9/125 μm).
When using 50/125 μm multimode fiber, subtract 3 dB from the optical power budget.
Optical transmission distance is limited to optical loss of the fiber and any additional loss introduced by connectors, splices and patch panels.
Maximum transmission distance is also limited by fiber bandwidth.
Power adapter is manufactured by third party and is supplied with fitted screw-terminal output cables.Power adapter included (for standalone) US, European, UK or Australian power plug.
Please feel free to consult Thor Fiber for any special requirement and customization
Due to continuous improvement, all fiber optic transmission systems and video over fiber product specifications are subject to change without further notice.

Question and Answers

Question:

Are these outputs isolated from each other (no shared common)? Are the relays mechanical or solid state? Does this price include two units for the bidirectional version?

Answer:

Our contact closure fiber devices have inputs and outputs that are
isolated as separate solid-state relays, which means that they do not
share a common ground or circuit.
This isolation is achieved through the use of solid-state relays,
which are electronic switches that use semiconductor components to
isolate the input and output circuits.
This isolation helps prevent interference and noise from affecting the
signals transmitted through the fiber devices.

Yes, the price includes both ends and power supplies.

Question:

Could you tell me if you have a 2 Relay Bi-Directional Contact closure over fiber that is rated for 120vAC 15A? Also, I read on the specifications for the F-2CC-B—TxRx that it is possible to send a 5V TTL Pulse or Signal, could you give me some more information on how that works?

Answer:

Unfortunately, the CC unit will not support 20A load, it can handle only about 0.8A.

But, I would suggest 2 step solution, we can supply external ON/OFF Switch controlled by fiber optic contact closure

UL Listed Power Switch
12 Amps Switching 120 VAC
10 Amps Switching 240 VAC
Contact Closure Input
Positive Feedback Output
Screw Terminal I/O connections
Default Power ON Model
Default Power OFF Model

Question:

I am looking into contact closure media converters and I see you have the Contact Closure over Fiber 2,4,8,16 one way or bidirectional avaialble. What mechanism is used to convert the input signals to whatever is being sent over the fibre to the receiver? Why type of hardware is located inside the converter for the conversion process?

Answer:

We offer 2–16 contact closure over fiber devices. These units essentially work like remote ON/OFF switches (relays), but over fiber optic links.

Here’s how they function:
When you short (connect) two of the open contact terminals on the transmitter (TX) side, the corresponding relay on the receiver (RX) side will close. This allows you to send simple contact signals—such as triggering alarms, opening gates, or switching devices—over long distances using fiber optics, without any electrical interference.

If you need further explanation, feel free to ask. Also, if you can share a bit more about your application, we’d be happy to check if this solution is suitable for your needs.

Question:

How to test contact closure fiber-optic devices, and can this be done without fiber?

Answer:

In order to test these units, you must have a fiber connection between them. The TX sends a signal to the RX to open or close the relay.

A basic test can be done by shorting the corresponding pins—for example, pins 1–2—which should trigger the relay on the RX side. You can simply connect a power meter between those pins to verify the operation.

Documents

16-contact-closures-or-ttl-over-fiber-transmitter-receiver-kit-8230

Contact Closure Over Fiber Converter 2 to 16 Channel Dry Contact / Relay over Fiber (Bidirectional or One-Way) 8 CC Bi-Directional

Description

Features

Drawings

Model Selection

Accessories & Upgrades

Specification

Question and Answers

Question: Are these outputs isolated from each other (no shared common)? Are the relays mechanical or solid state? Does this price include two units for the bidirectional version?

Question: Could you tell me if you have a 2 Relay Bi-Directional Contact closure over fiber that is rated for 120vAC 15A? Also, I read on the specifications for the F-2CC-B—TxRx that it is possible to send a 5V TTL Pulse or Signal, could you give me some more information on how that works?

Question: How to test contact closure fiber-optic devices, and can this be done without fiber?

Documents

Question:

Are these outputs isolated from each other (no shared common)? Are the relays mechanical or solid state? Does this price include two units for the bidirectional version?

Question:

Could you tell me if you have a 2 Relay Bi-Directional Contact closure over fiber that is rated for 120vAC 15A? Also, I read on the specifications for the F-2CC-B—TxRx that it is possible to send a 5V TTL Pulse or Signal, could you give me some more information on how that works?

Question:

How to test contact closure fiber-optic devices, and can this be done without fiber?