General
Number of ports	1
Wavelength	1310 nm
Range	20 km

The Moxa SFP-1G20ALC-T is an industrial-grade, 1-port Gigabit Ethernet SFP module designed as an extension for various industrial Moxa Ethernet switches. It is a hot-pluggable module that can be integrated into existing networks without interrupting operations. The module supports digital diagnostic monitoring (DDM) and is IEEE 802.3z-compliant, ensuring reliability and compatibility in professional networks. The use of LVPECL differential signals and TTL signal detection ensures stable data transmission over long distances. The module is designed for use in harsh industrial environments and features an extended operating temperature range of -40 to 85 °C, making it suitable for applications in extreme environmental conditions.

Applications

The SFP-1G20ALC-T is specifically designed for industrial networks requiring high reliability and robust operating conditions. It is suitable for applications in automation technology, power supply, transportation, and manufacturing industries. The model designation SFP-1G20ALC-T indicates a single-mode optics with a wavelength of 1310 nm, designed for a range of 20 km. This range enables connections between locations over long distances, such as between production halls, distribution centers, or across industrial sites. The use of single-mode fibers offers high bandwidth and low attenuation, which is important for critical applications with high data rates.

Features and Equipment in Detail

The module features a duplex LC connector, which is standard for connecting to single-mode fibers. The optical output power (TX power) ranges from -9.5 to +5 dBm, with the exact value being model-dependent. The receiver sensitivity (RX sensitivity) is up to -33 dBm, enabling high sensitivity to weak signals. The link budget ranges from 8.5 to 31 dB, allowing the module to maintain a stable connection even at low signal strength. The dispersion penalty ranges from 1 to 5 dB, which affects signal quality over long distances. For models with higher reach, such as SFP-LHX, ZX, EZX, EZX-120, and WDM models, an optical attenuator is recommended to optimize signal quality.

Technology Explained Simply

The module uses SFP transceiver technology, which provides an optical interface for Gigabit Ethernet in a compact format. The designation SFP-1G20ALC-T describes the model series (SFP-1G), the reach (20 km), the wavelength (1310 nm, A), the connector type (LC), and the temperature class (T for -40 to 85 °C). The use of single-mode fibers enables high data rates over long distances, as light waves are transmitted in a single mode, minimizing attenuation. The DDM function allows monitoring of parameters such as temperature, voltage, optical power, and fault conditions, simplifying maintenance and diagnostics during operation.

Compatibility and Accessories

The module is specifically developed for use with industrial Moxa Ethernet switches that feature SFP slots. It is IEEE 802.3z-compliant, ensuring interoperability with other Gigabit Ethernet devices. The model designation SFP-1G20ALC-T indicates single-mode optics compatible with standard single-mode fibers (SMF). For use in WDM systems (Wavelength Division Multiplexing), specific pairings are required, with the module SFP-20A/B intended for a reach of 20 km. The use of certified cables is recommended to achieve maximum reach, especially for multi-mode models.

Installation and Mounting

Installation is performed by simply inserting the module into the SFP slot of the switch. Due to the hot-pluggable function, no network interruption is required. The connection is made via a duplex LC connector, which is connected to the corresponding fiber cable. Correct alignment of the connector and the use of appropriate fiber cables are crucial for a stable connection. The operating temperature range of -40 to 85 °C allows use in environments with extreme temperatures, such as those found in industrial plants, outdoors, or in vehicles.

Operational Advantages

The module offers high reliability through the use of robust components and an extended temperature tolerance. The DDM function enables continuous monitoring of operating parameters, simplifying maintenance and reducing downtime. The hot-pluggable function allows flexible network design, as modules can be exchanged or added without network interruption. Compatibility with industrial Moxa switches and compliance with IEEE standards ensure secure and standardized integration into existing networks. The 5-year manufacturer's warranty underscores the quality and longevity of the product.