MOXA TCF-142-S-SC-T RS-232/422/485 to Single-Mode Fiber Converter
Overview
MOXA TCF-142-S-SC-T is an industrial-grade RS-232/422/485 serial-to-fiber media converter engineered to extend legacy serial communication distances up to 40 km over single-mode fiber optic cable using an SC connector. Purpose-built for demanding process plant and utility environments, this converter bridges electrically noisy or lightning-exposed field runs by replacing copper serial cabling with fiber optic media, eliminating ground-loop and EMI/RFI susceptibility while extending signal reach far beyond the standard 15 m copper RS-232 limit or several-hundred-metre RS-422/485 limit.
With fast quotation turnaround and technical support, Seven Star LLC proudly supplies the TCF-142-S-SC-T across Oman and the wider GCC, giving plant engineers and system integrators in the Sultanate of Oma genuine, warranty-backed access to Moxa’s industrial connectivity portfolio, together with local technical support for network design, commissioning, and long-term maintenance of serial-to-fiber links in refineries, power plants, and water infrastructure.
Operating Principle
The MOXA TCF-142-S-SC-T operates by converting the electrical signal levels of RS-232, RS-422, or 2-/4-wire RS-485 serial interfaces into optical pulses transmitted over single-mode G.652 fiber, and back again at the receiving end. Auto data direction control (ADDC) allows the unit to be used transparently in half-duplex RS-485 networks without external handshaking, while an integrated auto-baudrate detection function senses line speed automatically, simplifying commissioning across mixed-vendor instrumentation networks that were never originally designed with fiber backbones in mind.
Because the conversion is a pure physical-layer translation with no protocol interpretation, the TCF-142-S-SC-T is transparent to Modbus RTU, DNP3, and other serial SCADA protocols running above it, so existing PLC, RTU, and DCS logic requires no modification. The practical result is a link immune to electrical surges and ground potential differences between buildings, capable of spanning up to 40 km point-to-point or being deployed in a fiber ring topology with a circumference of up to 100 km for self-healing redundancy in critical monitoring loops.
Engineering Design of the MOXA TCF-142-S-SC-T
The MOXA TCF-142-S-SC-T unit is housed in a rugged metal DIN-rail-mountable enclosure rated for an extended operating temperature range of -40 °C to 75 °C (T-suffix wide-temperature variant), making it suitable for unconditioned equipment rooms, outdoor cabinets, and pipeline right-of-way shelters across Oman’s interior and coastal industrial zones. Dual power inputs accept a wide DC voltage range with terminal-block wiring, and LED indicators provide at-a-glance status for power, serial TxD/RxD activity, and fiber link/signal integrity, simplifying field diagnostics without a laptop.
On the MOXA TCF-142-S-SC-T, connectivity is provided via a DB9 serial port on the copper side and a single SC-type single-mode fiber port on the optical side, keeping the footprint compact for crowded marshalling cabinets. The enclosure’s passive, fanless design eliminates moving parts, reducing maintenance burden and failure points in continuously operating field installations, while DIN-rail clip mounting allows rapid installation alongside existing terminal blocks and I/O modules in standard 35 mm rail cabinets.
Key Features
The MOXA TCF-142-S-SC-T combines rugged construction with practical field-engineering features that reduce commissioning time and long-term maintenance:
- Converts RS-232, RS-422, and 2-/4-wire RS-485 serial signals to single-mode fiber optic transmission with an SC connector for distances up to 40 km.
- Supports fiber ring topology with a total ring circumference of up to 100 km, enabling redundant, self-healing serial network backbones.
- Automatic data direction control (ADDC) removes the need for external RTS/CTS handshaking logic in RS-485 half-duplex networks.
- Built-in auto-baudrate detection simplifies integration with legacy instrumentation whose exact baud rate may be undocumented.
- Wide operating temperature rating of -40 °C to 75 °C suits harsh outdoor and unconditioned equipment room deployment.
- Galvanic isolation via fiber optic transmission eliminates ground-loop currents and provides immunity to lightning-induced surges.
- Compact, fanless, DIN-rail-mountable metal housing minimizes cabinet footprint and eliminates fan-related maintenance.
- Dual power input terminals with LED power, data, and fiber-link status indicators support reliable operation and rapid field diagnostics.
Industrial Applications
The MOXA TCF-142-S-SC-T is widely deployed wherever serial-based instrumentation and control equipment must be linked over distances or through environments unsuitable for copper cabling, including oil and gas pipeline monitoring stations, remote wellhead RTUs, substation protection relay networks, and water and wastewater treatment SCADA backbones. The MOXA TCF-142-S-SC-T’s fiber-based isolation makes it a preferred choice for linking equipment across separate buildings or grounding zones, such as connecting a control room to a remote pump house or connecting protection relays across a switchyard where ground potential rise during a fault could otherwise damage copper-linked serial equipment.
With engineering support in Muscat, Seven Star LLC supplies the TCF-142-S-SC-T to industrial clients throughout Muscat, the Sohar Freezone and Port, Salalah’s port and logistics corridor, and inland oil and gas production sites, supporting engineering, procurement, and construction (EPC) contractors and end-user maintenance teams who require dependable, long-distance serial-to-fiber connectivity for SCADA, DCS, and remote telemetry systems across the Sultanate of Oman and the broader GCC region.
Technical Specifications
The table below summarizes the key technical parameters of the MOXA TCF-142-S-SC-T serial-to-fiber media converter, and the MOXA TCF-142-S-SC-T datasheet should be consulted for full compliance details:
| Parameter | Specification |
|---|---|
| Model | TCF-142-S-SC-T |
| Serial Interfaces | RS-232, RS-422, RS-485 (2-wire/4-wire), DB9 connector |
| Fiber Type / Connector | Single-mode (G.652), SC connector |
| Max Transmission Distance | Up to 40 km (point-to-point) |
| Ring Topology Support | Fiber ring circumference up to 100 km |
| Data Direction Control | Automatic (ADDC) for RS-485 |
| Baud Rate | Auto-detect, up to 921.6 kbps |
| Operating Temperature | -40 °C to 75 °C (T-suffix wide temperature) |
| Power Input | Dual DC power inputs, terminal block |
| Mounting | DIN-rail, metal enclosure |
| Status Indicators | Power, TxD/RxD, fiber link/signal LEDs |
Request a Quote for MOXA TCF-142-S-SC-T RS-232/422/485 to Single-Mode Fiber Converter
To request a formal quotation for the MOXA TCF-142-S-SC-T, confirm current availability and lead time, or download the full technical datasheet, contact the Seven Star LLC instrumentation and industrial networking division for the MOXA TCF-142-S-SC-T. Backed by genuine manufacturer documentation, Seven Star LLC provides genuine factory-warrantied units, application engineering support for serial-to-fiber network design, and responsive after-sales service to industrial clients across Muscat, Sohar, Salalah, and the wider Sultanate of Oman.
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Moxa switches and converters listed here
The EDS-G508E is a managed switch with eight Gigabit ports from the EDS managed line. The EDS-316-MM-SC-T is a 16-port unmanaged switch with 14 copper ports, two multi-mode SC fiber ports and the wide-temperature option (-40 to 75 C). The TCF-142-S-SC-T belongs to the TCF-142 series, which converts RS-232/422/485 serial signals to single-mode fiber. Moxa also makes serial device servers, protocol gateways, wireless devices and industrial computers, used on SCADA and telemetry networks across the GCC.Ordering Moxa devices: what we need
The suffixes carry the specification. Send the complete model name, including fiber mode and connector (MM-SC, SS-SC, ST), the -T wide-temperature suffix and any coating or approval suffix. Add the power supply voltage, the SFP modules needed and the quantity.Browse MOXA products by category: Industrial Communications.
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