# Moxa TCF-142-M-SC Serial Converter and Repeater for RS-232, RS-422, and RS-485 with SC Multi-Mode Fiber Interface and 850 nm Wavelength

**URL:** https://aio.lv/en/product--moxa-43419m--494459
**Data updated:** 2026-10-14 04:20 (EEST)
**Category:** Network Media Converters
**Manufacturer:** MOXA
**Manufacturer code:** 43419M
**EAN:** 5703431434196
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Moxa TCF-142-M-SC is a reliable serial converter, repeater, and isolator designed to extend RS-232, RS-422, and RS-485 communication distances using a multi-mode fiber optic cable with an SC connector. Operating at an 850 nm wavelength, it ensures secure industrial data transmission with galvanic isolation and flexible power input ranging from 12 to 48 V. Ideal for factory automation, substation control, and harsh industrial networking environments requiring robust signal conversion.

## Long description

The Moxa TCF-142-M-SC is a versatile serial converter and repeater engineered to extend the communication distance of RS-232, RS-422, and RS-485 serial interfaces using multi-mode fiber optic cabling. Utilizing an SC connector and an 850 nm wavelength, this device securely bridges traditional serial equipment with optical networks, ensuring reliable data transmission over distances up to 5 km. It features built-in galvanic isolation and protection against electrical interference and chemical corrosion, making it a dependable solution for demanding industrial environments.
Advantages
This industrial media converter provides robust immunity against electrical interference and chemical corrosion, safeguarding sensitive serial equipment in harsh operational settings. It features automatic baudrate detection to seamlessly process data signals without manual intervention or data loss when device speeds change. The integrated Automatic Data Direction Control technology efficiently manages RS-485 data flow at the hardware level without relying on external handshaking signals. Furthermore, the unit supports both point-to-point connections and fiber ring topologies, allowing flexible network design across extended facilities.
Suitable for
Extending RS-232, RS-422, or RS-485 serial communication distances up to 5 km using multi-mode fiber
Connecting industrial serial devices into a redundant fiber ring network topology
Factory automation and industrial control systems requiring galvanic isolation
Electrical substation automation and harsh environment networking
When it may not be suitable
This device is not compatible with single-mode fiber cables due to its specific multi-mode optical interface design. It also cannot simultaneously convert both RS-232 and RS-422/485 signals at the same time, as only one interface type can be actively configured for conversion.
Key specifications
Supported serial interfaces: RS-232, RS-422, RS-485
Fiber optic interface: Multi-mode with SC connector
Optical wavelength: 850 nm
Transmission distance: Up to 5 km on multi-mode fiber
Baudrate support: 50 bps to 921.6 Kbps
Power input range: 12 to 48 VDC
Topologies supported: Point-to-point and fiber ring
How to use
Mount the device securely in the intended industrial enclosure or panel. Connect your serial communication lines to the appropriate terminal blocks for RS-232, RS-422, or RS-485, ensuring that only one interface standard is utilized for conversion at a time. Attach the multi-mode fiber optic cable to the SC ports, matching the transmitter and receiver connections correctly for point-to-point links or ring configurations. Configure the operational modes using the physical DIP switches on the unit, apply the required 12 to 48 VDC power input, and the converter will automatically detect the serial baudrate and begin transmitting data.
What to consider before purchase
Verify that your existing cabling infrastructure uses multi-mode fiber with SC connectors
Confirm that your transmission distance requirements do not exceed the 5 km multi-mode limit
Check that your system requires conversion for either RS-232 or RS-422/485, but not a simultaneous combination of both
Ensure the available power supply meets the 12 to 48 VDC input requirements
Usage recommendations
For optimal network reliability in industrial environments, ensure proper grounding and cable routing to minimize physical stress on the fiber optic and serial connections. When setting up a fiber ring topology, carefully follow the alternating transmitter and receiver connection guidelines between neighboring units and configure the DIP switches to ring mode before powering on the system.

## Specifications

| Feature | Value |
|---|---|
| Host interface | RS-232/422/485 |
| Power consumption | 140 mA |
| Over current protection | Yes |
| Output interface | Fiber (SC) |
| RS-232 signals | GND, Rx, Tx |
| Surge protection voltage | 2 kV |
| Electrostatic Discharge (ESD) protection | 15 kV |
| Baud rate | 921.6 Kbit/s |
| Transmission distance (multi-mode) | 5 km |
| RS-422 signals | TxD-, TxD+, SGND, RxD-, RxD+ |
| RS-485 signals | TxD-, TxD+, SGND, RxD-, RxD+, Data-, Data+ |
| RX sensitivity | -20 dB |
| TX output | -5 dB |

### Other features

| Feature | Value |
|---|---|
| Dimensions (WxDxH) | 67 x 100 x 22 |

### Certificates

| Feature | Value |
|---|---|
| Certification | EN, FCC |
| Safety | UL/CUL, TUV |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 5 - 95 |
| Storage temperature (T-T) | -40 - 85 |
| Operating temperature (T-T) | 0 - 60 |

### Power

| Feature | Value |
|---|---|
| Input voltage | 12 - 48 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Fiber optic connector | SC |

### Features

| Feature | Value |
|---|---|
| LED indicators | Y |

### Performance

| Feature | Value |
|---|---|
| Wavelength | 850 nm |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All MOXA products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized MOXA service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: wavelength, fiber optic connector, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Moxa TCF-142-M-SC Serial Fiber Converter?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/494459/54591568_large.webp