General
Number of ports	1
Wavelength	1550 nm
Range	40 km

The SFP-1G40BLC from Moxa is a 1-port Gigabit Ethernet SFP transceiver module designed as an extension for Moxa Ethernet switches. It enables connection via single-mode fiber cables with a wavelength of 1550 nm and a maximum reach of 40 km. The module is designed for industrial networks with high demands on performance and reliability, and offers full compatibility with the IEEE 802.3z standardization. It features a hot-pluggable LC duplex interface, enabling easy installation and replacement without interrupting network operation.

Applications
This module is suitable for long-distance connections in industrial environments, such as in power supply, transportation infrastructure, or process automation. The maximum reach of 40 km makes it particularly suitable for applications requiring connections over long distances without the need for additional amplifiers or regenerators. Its robust construction allows use in harsh environments, especially in combination with T-models designed for operating temperatures from -40 to +85 °C.

Functions and Features in Detail
The SFP-1G40BLC supports Digital Diagnostic Monitoring (DDM), enabling continuous monitoring of optical parameters such as transmit power, receive sensitivity, and temperature. This facilitates fault diagnosis and maintenance during operation. Additionally, the module features differential LVPECL inputs and outputs as well as TTL signal detection, which are important for integration into complex network systems. The hot-pluggable function allows module replacement without network downtime.

Technology Explained Simply
The module operates in single-mode mode with a wavelength of 1550 nm, optimized for long transmission distances. The TX power ranges from -9.5 to +5 dBm, while the RX sensitivity reaches up to -33 dBm. The link budget ranges from 8.5 to 31 dB, reflecting the module’s ability to transmit signals over long distances with low attenuation. When used over 40 km, an attenuation element is recommended to ensure signal quality. Power supply is provided via the switch system, with a maximum power consumption of 1 W.

Compatibility and Accessories
The module is specifically developed for use with Moxa Ethernet switches and complies with the IEEE 802.3z standard. It is part of the SFP-1G series, which includes various transceiver types for different reach distances and fiber types. WDM models (such as SFP-40A/B) can be used in pairs to transmit two independent data channels over a single fiber cable. Compatibility with various fiber types (e.g., OM1 to OM4) is also supported within the series, although the SFP-1G40BLC is specifically designed for single-mode applications.

Installation and Mounting
Installation is performed by simply inserting the module into the corresponding SFP slot of a Moxa switch. The hot-pluggable function allows replacement without network interruption. The LC duplex interface requires the use of compatible LC connectors. Mounting is tool-free, as the module is mechanically inserted into the slot and secured by a locking mechanism.

Operational Advantages
The combination of high reach, DDM function, and hot-pluggable design provides high availability and maintainability in industrial operation. The ability to transmit signals over 40 km reduces the need for additional network components. The robust construction and support for extreme temperatures make the module suitable for demanding operating conditions. The 5-year warranty underscores the product’s reliability.