# Serial Converter Repeater Isolator Moxa TCF-142-M-ST

**URL:** https://aio.lv/en/product--moxa-tcf-142-m-st--3298762
**Data updated:** 2025-12-29 10:52 (EET)
**Category:** Network Media Converters
**Manufacturer:** MOXA
**Manufacturer code:** TCF-142-M-ST
**EAN:** 5703431411692
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 101.99 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 84.29 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--moxa-tcf-142-m-st--3298762

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The Moxa TCF-142-M-ST is a versatile serial converter/repeater/isolator for RS-232/422/485 applications. It features compact dimensions of 67 x 100 x 22 mm and operates on an input voltage of 12 - 48 V with a power consumption of 140 mA. Certified with EN, FCC, and safety standards UL/CUL, TUV, this device ensures reliable data transmission over fiber optics, making it ideal for industrial environments.

## Long description

The Moxa TCF-142-M-ST is a compact serial converter/repeater/isolator that converts RS-232 or RS-422/485 serial interfaces to optical fiber. Designed for industrial serial links, the TCF-142-M-ST supports multi-mode fiber connections and extends serial transmission distances up to 5 km. It accepts 12–48 V input power, has a small footprint (67 x 100 x 22 mm), and is certified to EN, FCC and UL/CUL/TUV safety standards for reliable operation in electrically noisy environments.
Advantages
The device offers automatic baudrate detection to maintain data flow even if the connected device’s baudrate changes. It supports both point-to-point and ring topologies, with ring operation allowing fiber rings up to 100 km in circumference. The TCF-142-M-ST includes Moxa’s patented Automatic Data Direction Control (ADDC®) for RS-485, eliminating the need for manual handshaking for direction control. Its compact size and isolation reduce electrical interference and chemical corrosion risks, and wide-temperature models are available for harsh environments.
Suitable for
Extending RS-232/422/485 serial links over multi-mode fiber up to 5 km
Industrial environments with electrical noise where galvanic isolation is required
Point-to-point or fiber ring serial networks
Applications requiring automatic baudrate detection and automatic RS-485 direction control
Key specifications
Serial interfaces supported: RS-232 or RS-422/485 (selectable, not simultaneous)
Fiber type: multi-mode (TCF-142-M), ST connector
Maximum distance: up to 5 km (multi-mode)
Baudrate range: 50 bps to 921.6 kbps
Power input: 12–48 VDC, typical current 140 mA
Dimensions: 67 x 100 x 22 mm
Certifications: EN, FCC, UL/CUL, TUV
Operating temperature: standard and wide-temperature models (wide: -40 to 75 °C)
How to use
Mount the converter in a suitable location and connect the power supply within the specified 12–48 VDC range. Select the required serial interface mode (RS-232 or RS-422/485) using the device switches; the unit cannot convert both simultaneously. Connect the multi-mode fiber using the ST connector to the Tx/Rx ports. For ring operation, link the Tx of one unit to the Rx of the neighboring unit and set each converter to "ring mode" via DIP switches. The unit will automatically detect the serial baudrate and, for RS-485 lines, manage data direction using ADDC®.
Usage recommendations
For reliable operation, use quality multi-mode fiber and proper ST connectors, ensure power supply within the 12–48 V range, and configure DIP switches according to whether you need point-to-point or ring topology. Choose a wide-temperature model if deploying in extreme temperature conditions.

## Specifications

| Feature | Value |
|---|---|
| Host interface | RS-232/422/485 |
| Power consumption | 140 mA |
| Over current protection | Yes |
| Output interface | Fiber (ST) |
| RS-232 signals | Tx, Rx, GND |
| 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 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Fiber optic connector | ST |

### Performance

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

### Other features

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

### Power

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

### 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 |

### Features

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

## FAQ

### How much does the Serial Converter Moxa TCF-142-M-ST cost, and is it available for purchase?

The price is 101.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### 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: 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 Serial Converter Moxa TCF-142-M-ST?

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/3298762/58332419_large.webp