General
Wavelength	1550 nm
Range	40 km
IEEE standard	802.3z

The Moxa SFP-1G40BLC-T is a compact, high-performance 1-port Gigabit Ethernet SFP module, specifically designed for use in industrial networks. It serves as an optical transceiver for data transmission over fiber optic cables and is suitable for use with a wide range of industrial Ethernet switches. The module is hot-pluggable, meaning it can be inserted or removed from a corresponding SFP slot without interrupting network operation. It supports digital diagnostic monitoring (DDM), enabling real-time monitoring of optical parameters such as transmit power, receive level, and temperature. Compliance with the IEEE 802.3z standard ensures compatibility with standard Gigabit Ethernet networks. The use of LVPECL differential signals and TTL signal detection ensures reliable high-speed data transmission over fiber optic cables.

Applications

The module is designed for use in demanding industrial environments, particularly in applications with high temperature variations, such as manufacturing, energy supply, or rail transport. The T-model designation indicates that it is designed for extreme operating temperatures from -40 to +85 °C, making it especially suitable for harsh environments. It can be used in networks requiring high reliability and stability, such as in process automation or for transmitting sensor data over long distances.

Functions and Features in Detail

The SFP-1G40BLC-T is a single-mode transceiver designed for a range of 40 km. It uses a wavelength of 1550 nm, which is typical for long-distance transmission and allows for low attenuation in fiber optic cables. The connector interface is via an LC duplex connector, which is standard for SFP modules. The optical transmit power ranges from -9.5 dBm to +5 dBm, while the receive range extends up to -33 dBm. The link budget is between 8.5 dB and 31 dB, with dispersion penalty ranging from 1 to 5 dB. For long distances and use in WDM systems, the use of an attenuator is recommended to ensure signal quality.

Technology Explained Simply

The module operates as an optical transceiver, converting electrical data into light signals and transmitting them over a fiber optic cable. The use of single-mode fiber enables high bandwidth and long transmission distances, as light is guided in a single mode (radiation pattern), minimizing signal distortion. The 1550 nm wavelength is in the region of minimum attenuation in fiber optic cables, enabling the maximum range of 40 km. The DDM function allows monitoring of optical performance, which is beneficial for maintenance and troubleshooting. TTL signal detection ensures the module correctly recognizes the status of the network connection.

Compatibility and Accessories

The module is designed for use with industrial Ethernet switches that feature SFP slots. It is part of Moxa’s SFP-1G series, which offers a wide range of variants for different requirements regarding range and environment. The T-models are specifically designed for extreme temperatures. The module can be used in combination with other SFP modules, particularly in WDM systems, where multiple signals are transmitted over a single fiber optic cable. Pairing with an SFP-40A module enables use in WDM systems with a range of 40 km.

Installation and Mounting

Installation is performed by simply inserting the module into an SFP slot of a compatible switch. Due to the hot-pluggable feature, no network downtime is required. The connector interface is via an LC duplex connector, which is connected to a single-mode fiber optic cable. Correct alignment of the connector is important to ensure a reliable connection. Mounting requires no special tools, and the connection is established mechanically by inserting the module into the slot.

Operational Advantages

The module offers high reliability and stability in industrial applications. Its ability to operate at extreme temperatures from -40 to +85 °C makes it especially suitable for harsh environments. The DDM function enables proactive monitoring of the network connection, simplifying maintenance. The high range of 40 km with single-mode fiber reduces the need for repeaters or additional switches. The low power consumption of up to 1 W minimizes thermal load and operating costs. Certifications according to UL 62368-1, IEC 62368-1, IEC 60825-1, as well as EMC and immunity standards (IEC 61000-4-2 to -4-11) guarantee safety and reliability in operation. Maritime certification according to DNV extends the application range to ships and offshore installations. The 5-year warranty underscores the quality and longevity of the product.