Views: 599 Author: Anna Publish Time: 2026-04-14 Origin: Site
A 1x9 optical module, also called a 9-pin module, has 9 pins. It's a solderable module that needs to be soldered onto a circuit board. Each pin has a different function, and there are three interface types: SC/FC/ST.
Functionally, it acts as an "optical-electrical signal bridge" between the equipment and the fiber optic link—it converts the internal electrical signals of the equipment into optical signals that can be transmitted through fiber optics, and it also converts the optical signals transmitted from the fiber optics back into electrical signals that the equipment can recognize, enabling stable data exchange.
This "classic packaged optical module," introduced in 1999, has secured its essential status thanks to three core design features:
First, the 9-pin design provides a highly stable plug-in structure, adapting to the long-term use requirements of industrial equipment;
Second, the environmentally friendly and breathable shell balances the internal and external air pressure of the module, preventing condensation problems caused by temperature and humidity changes;
Third, its wide temperature range allows it to operate stably in environments with temperature differences ranging from -40℃ to 85℃.
The 1x9 industrial-grade optical module adopts an industrial-grade temperature design (-40°C-85°C). This allows it to adapt to various harsh environmental conditions. In some outdoor security monitoring systems, equipment often has to withstand various severe weather and temperature changes. The 1x9 optical module, with its industrial-grade temperature design, ensures stable system operation.
Compared to SFP modules, the 1x9 optical module omits the DDM digital diagnostic module and electromagnetic shielding design in its hardware architecture (Q), and, combined with hermetic welding technology, is robust and reliable. In terms of cost control, omitting the DDM monitoring unit and electromagnetic shielding components reduces material costs by approximately 60%, providing a significant cost-performance advantage in fixed scenarios such as ODF patch panels and industrial Ethernet. Currently, this module maintains a stable market share in areas such as industrial automation four-control networks and relay protection systems, and its physical layer reliability advantage continues to support the infrastructure construction needs of specific industries.
The 1x9 optical module supports ultra-low-speed transmission from 0-2Mbps up to speeds of 2.5Gbps. This means that 1x9 optical modules can handle both basic equipment connections with low data transmission speed requirements and conventional network communications with certain speed requirements. For example, in low-speed control signal transmission in some industrial automation equipment, lower-speed 1x9 optical modules can be selected for stability and efficiency.
The module has three interface types: SC/FC/ST. The FC type fiber optic connector uses a metal sleeve for external reinforcement and a screw fastening method. It is generally used on the ODF side and is most commonly used on patch panels.
The SC type fiber optic connector connects to GBIC optical modules. Its shell is rectangular, and it uses a push-pull latch fastening method, requiring no rotation. It is most commonly used on routers and switches.
The ST type fiber optic connector is commonly used in fiber optic patch panels. Its shell is round, and it uses a screw fastening method. For 10Base-F connections, the connector is usually of the ST type and is commonly used in fiber optic patch panels.
