General
Wavelength	1550 nm
Range	20 km
Maximum power consumption	1 W
Laser class	1
Hot-plug capable

The Moxa SFP-1G20BLC-T is a 1-Port Gigabit Ethernet SFP module, specifically developed for industrial networking applications. It enables the connection of network devices via fiber optic cables and is part of Moxa's SFP-1G series, known for its robustness and reliability in demanding environments. The module is designed for use in switches and other network devices that support an SFP interface, and offers high flexibility through hot-plug capability and digital diagnostic monitoring (DDM). The model designation SFP-1G20BLC-T indicates a single-mode transceiver variant with a wavelength of 1550 nm, designed for a reach of up to 20 km. The designation 20B identifies the WDM transceiver variant, which is used in pair operation with a complementary module (e.g. SFP-1G20A) to enable bidirectional data transmission over a single fiber optic cable.

Applications

The module is designed for industrial networks requiring high demands on temperature resistance, electromagnetic compatibility, and mechanical robustness. It is particularly suitable for applications in automation technology, power supply, transportation technology, and other areas where networks are operated under extreme environmental conditions. The T-model designation indicates an extended operating temperature range, enabling use in climatically challenging environments.

Functions and Features in Detail

The SFP-1G20BLC-T features an LC simplex connector, typical for WDM transceivers, and enables bidirectional data transmission over a single fiber optic cable. The hot-plug capability allows insertion and removal of the module without interrupting network operation, which is advantageous for maintenance and expansion work. The integrated digital diagnostic monitoring (DDM) enables real-time monitoring of parameters such as optical power, temperature, and voltage, to optimize operation and detect faults early. The TTL signal detect function indicates data reception, which is helpful for network diagnostics.

Technology Explained Simply

The module operates according to the Gigabit Ethernet standard (IEEE 802.3z) and transmits data at a speed of 1 Gbit/s over single-mode fiber optic cable. The wavelength of 1550 nm is suitable for long transmission distances, as it exhibits lower attenuation in fiber optic cable. The maximum reach is 20 km, with the actual distance depending on cable quality and optical power. The TX power is in the range of +5 to -9.5 dBm, and the RX sensitivity is up to -33 dBm, enabling a link budget of up to 31 dB. The maximum power consumption is 1 W, which allows efficient power supply via the network cable (PoE), if the device supports it.

Compatibility and Accessories

The module is compatible with Moxa Ethernet switches that offer an SFP interface. It is designed as a WDM transceiver and must be used in pair operation with a complementary module (e.g. SFP-1G20A) to enable bidirectional data transmission over a single fiber optic cable. The use of certified fiber optic cables is recommended to achieve maximum reach. The modules comply with international standards such as UL 62368-1, IEC 62368-1, EN 55032/35, FCC 15B, ICES-003, and IEC 61000-4-2 to 4-11, ensuring their safety and electromagnetic compatibility. Additionally, the module is compliant with Class 1 laser product requirements according to EN 60825-1, allowing safe handling.

Installation and Mounting

Installation is performed by inserting the module into the SFP slot of a compatible switch. Due to the hot-plug capability, this can be done without powering down the device. Connection to the fiber optic cable is made via the LC simplex connector. Correct alignment of the module and the use of an appropriate cable are crucial for a stable connection. Mounting requires no special tools, and the connection is mechanically stable.

Operational Advantages

The module offers high operational reliability due to its extended temperature range of -40 to 85 °C, making it suitable for use in extreme environments. The DDM function enables proactive network monitoring, allowing failures to be detected and resolved early. The hot-plug capability reduces downtime during maintenance. Compatibility with Moxa switches and compliance with international standards ensure reliable and secure integration into existing networks. The 5-year manufacturer's warranty underscores the quality and longevity of the product.

Certifications and Standards

The module complies with safety standards UL 62368-1 and IEC 62368-1, as well as Laser Class 1 according to EN 60825-1. EMC certifications include EN 55032/35, FCC 15B, and ICES-003. EMS certifications according to IEC 61000-4-2 to 4-11 ensure functionality under electromagnetic interference. Additionally, the module is certified for marine applications according to DNV, confirming its suitability for ship technology and offshore installations.

Operating Environment

The module is designed for operation in environments with temperatures from -40 to 85 °C, making it suitable for use in industrial facilities, outdoors, or in climatically challenging regions. The storage temperature is also -40 to 85 °C, and the humidity range is 5 to 95 % (non-condensing). These specifications ensure high reliability under variable conditions.

Scope of Delivery

The product is delivered with one SFP-1G module and a warranty card.

Manufacturer's Warranty

The manufacturer's warranty is 5 years.