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Hobby Components RLink 2 Channel RS485 / Parallel Relay Module

Name: Hobby Components RLink 2 Channel RS485 / Parallel Relay Module
Brand: Hobby Components
SKU: 09993cea90bf8b0d80e96dfd1c4947db
Price: 5.82 GBP
Availability: InStock

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Amazon The rLink 2-Channel Relay Module is an addressable relay module designed for reliable control of loads over an RS485 bus. Using the rLink register-based protocol, multiple relay modules can be controlled from a single master device on a shared bus. Each module provides two independent relay outputs, making it suitable for switching lights, pumps, motors, solenoids, and other loads in automation and control applications. Communication is handled via RS485, offering excellent noise immunity and long cable runs of up to 1200 meters. The protocol is based on standard UART-style serial communication, making it straightforward to integrate with microcontrollers, USB-to-RS485 adapters, PLCs, and embedded systems. By using a ¼ load RS485 transceiver, up to 128 devices can be connected to a single bus. Device address, baud rate, and relay behaviour can be configured via protocol commands and are stored in non-volatile memory. Optionally, the relays can be configured to automatically turn off after a programmable amount of time allowing for fail safe operation. Although the module is designed for remote operation, it has a physical interface to allow the relays to be controlled locally like a standard parallel relay module. PLEASE NOTE: To control the module using a microcontroller such as a Raspberry Pi or Arduino you will need an RS485 adapter to interface the microcontrollers GPIO interface to the RS485 bus. We recommend our RS485 transceiver which is compatible with both 3.3V and 5V microcontrollers: For Arduino and Raspberry Pi users, we provide a library (for Arduino) or a Python module (for Raspberry Pi) that allows easy control of rLink modules without needing to worry about the low-level protocol. In both cases, the library/module communicates with one or more modules via a serial UART interface, using a suitable serial-to-RS485 adapter (see SKU: HCMODU0270).

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£ 5.82

Description (1)

The rLink 2-Channel Relay Module is an addressable relay module designed for reliable control of loads over an RS485 bus. Using the rLink register-based protocol, multiple relay modules can be controlled from a single master device on a shared bus. Each module provides two independent relay outputs, making it suitable for switching lights, pumps, motors, solenoids, and other loads in automation and control applications. Communication is handled via RS485, offering excellent noise immunity and long cable runs of up to 1200 meters. The protocol is based on standard UART-style serial communication, making it straightforward to integrate with microcontrollers, USB-to-RS485 adapters, PLCs, and embedded systems. By using a ¼ load RS485 transceiver, up to 128 devices can be connected to a single bus. Device address, baud rate, and relay behaviour can be configured via protocol commands and are stored in non-volatile memory. Optionally, the relays can be configured to automatically turn off after a programmable amount of time allowing for fail safe operation. Although the module is designed for remote operation, it has a physical interface to allow the relays to be controlled locally like a standard parallel relay module. PLEASE NOTE: To control the module using a microcontroller such as a Raspberry Pi or Arduino you will need an RS485 adapter to interface the microcontrollers GPIO interface to the RS485 bus. We recommend our RS485 transceiver which is compatible with both 3.3V and 5V microcontrollers: For Arduino and Raspberry Pi users, we provide a library (for Arduino) or a Python module (for Raspberry Pi) that allows easy control of rLink modules without needing to worry about the low-level protocol. In both cases, the library/module communicates with one or more modules via a serial UART interface, using a suitable serial-to-RS485 adapter (see SKU: HCMODU0270).