Industrial Grade RS485 Repeater

This industrial-grade high-performance RS485 photoelectric isolation repeater is an essential component for enhancing communication in various technical fields. It stands out for its ability to convert one-way RS485 to another one-way RS485, maintaining compatibility with the EIA/TIA RS485 standard. With features like asynchronous half-duplex and two-way communication, it ensures complete transparent data transmission. The repeater amplifies RS485 signals, extending bus network communication distances up to 1200 meters at a baud rate of 9600bps.

Supporting a maximum connection of 128 nodes, the repeater facilitates seamless integration across a network, with each branch length kept under 10 meters, and overall bus length expanding up to 1200 meters. Utilizing a hand-in-hand bus connection mode prohibits problematic fork and star connections between nodes. The design is precise for point-to-point or point-to-multipoint connections, enabling efficient communication across the network.

In practical applications, a single repeater can connect one 485 output device for point-to-point setups or thirty-two devices for point-to-multipoint arrangements, as long as adjacent devices are within 10 meters. When used in parallel, up to sixteen repeaters share a single 485 input device, collectively supporting as many as 128 devices. Additionally, cascading allows for tree topology arrangements, extending communication distances indefinitely without sacrificing signal integrity.

The construction of the repeater is geared towards industrial automation communication. Inside, an industrial-grade anti-jamming chip intelligently discriminates circuits and senses the direction of data flow, ensuring a stable signal and reliable data communication. It features a built-in DC-DC voltage-stabilized source with isolation capability of 1500V and uses optocouplers to isolate the RS485 master-slave network. This ensures data communication remains unaffected by ground loops and common-mode voltage differences. Enhanced protection is ensured through TVS transient suppression and self-recovery fuse current limiting, alongside an anti-reverse power circuit, enabling resilience in challenging industrial environments.

Connectivity options for the repeater are clearly defined, including input and output signal configurations along with status indicators. The module's indicator lights provide straightforward monitoring, lighting up when data isn't transmitting and blinking during data transfer. This feature, coupled with its robust design, makes the repeater suitable for a broad array of applications. From signal acquisition in industrial field equipment to roles in power acquisition, security monitoring, building intercoms, and swipe card door entry systems, its versatility is apparent. Whether extending communication in highway toll systems, PLC setups, parking lot systems, or under the MODBUS protocol, the module proves to be a reliable keystone in telecommunications infrastructure.