The RS485 Isolator 3 Click Board™ is based on the ADM2763E, a 5.7kV RMS signal-isolated RS-485 transceiver from Analog Devices. The ADM2763E is optimized for low speed over long cable runs and has a maximum data rate of 500kbps. It is protected against ≥±12 kV contact and ≥±15 kV air IEC 61000-4-2 electrostatic discharge (ESD) events on the RS485 receiver and driver terminal pins, easily accessible via the screw terminal blocks. The ADM2763E has four bus signals: signal A for the noninverting input signal, signal B for the inverting input signal, signal Y for the noninverting output signal, and signal Z for the inverting output signal, alongside a common ground connection.
Using coplanar transformer coils with an ON or OFF keying modulation scheme allows a high data throughput across the isolation barrier of the ADM2763E while minimizing radiation emissions. Architecture like this provides a digital isolator with immunity to common-mode transients >250 kV/μs across the device's full temperature and supply range. The ADM2763E also features a proprietary transmitter architecture with a low driver output impedance that increases the differential output voltage. The high differential output voltage extends the reach of the ADM2763E to longer cable lengths and makes this board suitable for PROFIBUS® nodes when powered with 5V on the isolated side of a supply (isolated-side provides the possibility of a supply voltage in the range from 3V to 5.5V).
Besides commonly used UART TX and RX pins on the mikroBUS™ socket, this board also has receiver and driver enable pins routed to the RE and DE pins of the mikroBUS™ socket. It also features a receiver cable invert pin, routed to the INV pin of the mikroBUS™ socket, to quickly correct the reversed cable connection on the A and B receiver bus pins while maintaining complete receiver fail-safe performance.
In addition, the ADM2763E has a built-in receiver fail-safe for the bus idle condition, accessible through some of the unpopulated onboard jumpers (the R4 and R5 pull-up resistors to the VDD2 isolated-side supply on the ADM2763E pins A and Y, as well as the R14 and R15 pull-down resistors to the GND2 common ground connection on pins B and Z). These resistors can be fitted if the user connects this board to other devices that require external biasing resistors on the bus. The ADM2763E also has a jumper that allows adding a 120Ω load to the RS485 receiver by placing the jumper cap on it.
The RS485 Isolator 3 Click Board™ can operate with either 3.3V or 5V logic voltage levels selected via the VDD1 SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
| Type | Isolators,RS485 |
| Applications | Can be used for many industrial and automation applications that require insulation against working voltages of 1060V RMS and 1500VDC for the device's lifetime |
| On-board modules | ADM2763E - 5.7kV RMS signal isolated RS-485 transceiver from Analog Devices |
| Key Features | Low radiated emissions, receiver cable inversion smart feature, ESD protection on the RS485 A, B, Y, and Z bus pins, low speed 500kbps data rate, flexible power supply inputs, PROFIBUS® compliant for 5V VDD2, built-in receiver fail-safe for the bus idle condition, allows adding a 120Ω load to the RS485 receiver, and more |
| Interface | UART |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
This table shows how the RS485 Isolator 3 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| NC | 1 | AN | PWM | 16 | DE | Driver Enable | |
| Receiver Enable | RE | 2 | RST | INT | 15 | INV | Receiver Cable Invert |
| NC | 3 | CS | RX | 14 | TX | UART TX | |
| NC | 4 | SCK | TX | 13 | RX | UART RX | |
| NC | 5 | MISO | SCL | 12 | NC | ||
| NC | 6 | MOSI | SDA | 11 | NC | ||
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1 | VDD1 SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
| J1 | J1 | Populated | Jumper for adding a 120Ω load to the RS485 receiver |
| R4, R5, R14, R15 | R4, R5, R14, R15 | Unpopulated | Biasing Resistors for Bus Idle Fail-Safe |
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Isolated-Side Power Supply | 3 | - | 5.5 | V |
| Data Rate | - | 500 | - | kbps |
| ESD Protection | - | ±15 | - | kV |
We provide a library for the RS485 Isolator 3 Click Board™ as well as a demo application (example), developed using MikroE compilers. The demo can run on all the main MikroE development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for the RS485 Isolator 3 Click Board™ driver.
Key functions
rs485isolator3_enable_receiver_input RS485 Isolator 3 enable receiver input function.
rs485isolator3_disable_receiver_input RS485 Isolator 3 disable receiver input function.
rs485isolator3_disable_output RS485 Isolator 3 disable output function.
Example Description
This example reads and processes data from the RS485 Isolator 3 Click Board™.
void application_task ( void )
{
#ifdef DEMO_APP_RECEIVER
rs485isolator3_process( );
#endif
#ifdef DEMO_APP_TRANSMITTER
rs485isolator3_generic_write( &rs485isolator3, data_buf, strlen( data_buf ) );
log_info( &logger, "---- Data sent ----" );
Delay_ms( 2000 );
#endif
}
The full application code, and ready to use projects can be installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Other MikroE Libraries used in the example:
Additional Notes and Information
Depending on the development board you are using, you may need USB UART Click Board™, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroE compilers.
The RS485 Isolator 3 Click Board™ is supported with mikroSDK - MikroE Software Development Kit, which needs to be downloaded from the LibStock and installed for the compiler you are using to ensure proper operation of mikroSDK compliant Click board™ demo applications.
- manufacturer: Mikroelektronika d.o.o. - warranty: 12 months - backorder_label: If no stock shown above, check availability - attachments: [{"download_file":[{"download_file":"RS485 Isolator 3 Click Board™ Schematic"}],"download_filetype":[{"download_filetype":"pdf"}]},{"download_file":[{"download_file":"Analog Devices ADM2763E RS-485 transceiver Datasheet"}],"download_filetype":[{"download_filetype":"pdf"}]}] - device_vendor: Analog Devices Inc. - device_type: ADM2763EBRWZ - warranty: 12 months - brand: MikroE - manufacturer: Mikroelektronika d.o.o. - target_keyword: RS485 Isolator 3 Click Board - brands: gid://shopify/Metaobject/56256004319 - breadcrumbs: ["gid://shopify/Collection/447955239135","gid://shopify/Collection/241680580797","gid://shopify/Collection/241546100925"] - mpn: MIKROE-5597 - customhs_code: 847330 - detailed_description: {"type":"root","children":[{"type":"heading","level":3,"children":[{"type":"text","value":"How Does The RS485 Isolator 3 Click Board™ Work?"}]},{"type":"paragraph","children":[{"type":"text","value":"The "},{"type":"text","value":"RS485 Isolator 3 Click Board™","bold":true},{"type":"text","value":" is based on the ADM2763E, a 5.7kV RMS signal-isolated RS-485 transceiver from Analog Devices. The ADM2763E is optimized for low speed over long cable runs and has a maximum data rate of 500kbps. It is protected against ≥±12 kV contact and ≥±15 kV air IEC 61000-4-2 electrostatic discharge (ESD) events on the RS485 receiver and driver terminal pins, easily accessible via the screw terminal blocks. The ADM2763E has four bus signals: signal A for the noninverting input signal, signal B for the inverting input signal, signal Y for the noninverting output signal, and signal Z for the inverting output signal, alongside a common ground connection."}]},{"type":"paragraph","children":[{"type":"text","value":""}]},{"type":"paragraph","children":[{"type":"text","value":"Using coplanar transformer coils with an ON or OFF keying modulation scheme allows a high data throughput across the isolation barrier of the ADM2763E while minimizing radiation emissions. Architecture like this provides a digital isolator with immunity to common-mode transients >250 kV/μs across the device's full temperature and supply range. The ADM2763E also features a proprietary transmitter architecture with a low driver output impedance that increases the differential output voltage. The high differential output voltage extends the reach of the ADM2763E to longer cable lengths and makes this board suitable for PROFIBUS® nodes when powered with 5V on the isolated side of a supply (isolated-side provides the possibility of a supply voltage in the range from 3V to 5.5V)."}]},{"type":"paragraph","children":[{"type":"text","value":"Besides commonly used UART TX and RX pins on the mikroBUS™ socket, this board also has receiver and driver enable pins routed to the RE and DE pins of the mikroBUS™ socket. It also features a receiver cable invert pin, routed to the INV pin of the mikroBUS™ socket, to quickly correct the reversed cable connection on the A and B receiver bus pins while maintaining complete receiver fail-safe performance."}]},{"type":"paragraph","children":[{"type":"text","value":"In addition, the ADM2763E has a built-in receiver fail-safe for the bus idle condition, accessible through some of the unpopulated onboard jumpers (the R4 and R5 pull-up resistors to the VDD2 isolated-side supply on the ADM2763E pins A and Y, as well as the R14 and R15 pull-down resistors to the GND2 common ground connection on pins B and Z). These resistors can be fitted if the user connects this board to other devices that require external biasing resistors on the bus. The ADM2763E also has a jumper that allows adding a 120Ω load to the RS485 receiver by placing the jumper cap on it."}]},{"type":"paragraph","children":[{"type":"text","value":"The RS485 Isolator 3 Click Board™ can operate with either 3.3V or 5V logic voltage levels selected via the VDD1 SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development."}]},{"type":"heading","level":3,"children":[{"type":"text","value":"SPECIFICATIONS"}]},{"type":"paragraph","children":[{"type":"text","value":"Type\nIsolators,RS485\nApplications\nCan be used for many industrial and automation applications that require insulation against working voltages of 1060V RMS and 1500VDC for the device's lifetime\nOn-board modules\nADM2763E - 5.7kV RMS signal isolated RS-485 transceiver from Analog Devices\nKey Features\nLow radiated emissions, receiver cable inversion smart feature, ESD protection on the RS485 A, B, Y, and Z bus pins, low speed 500kbps data rate, flexible power supply inputs, PROFIBUS® compliant for 5V VDD2, built-in receiver fail-safe for the bus idle condition, allows adding a 120Ω load to the RS485 receiver, and more\nInterface\nUART\nCompatibility\nmikroBUS\nClick board size\nL (57.15 x 25.4 mm)\nInput Voltage\n3.3V or 5V"}]},{"type":"heading","level":3,"children":[{"type":"text","value":"PINOUT DIAGRAM"}]},{"type":"paragraph","children":[{"type":"text","value":"This table shows how the RS485 Isolator 3 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns)."}]},{"type":"paragraph","children":[{"type":"text","value":"Notes\nPin\nPin\nNotes\nNC\n1\nAN\nPWM\n16\nDE\nDriver Enable\nReceiver Enable\nRE\n2\nRST\nINT\n15\nINV\nReceiver Cable Invert\nNC\n3\nCS\nRX\n14\nTX\nUART TX\nNC\n4\nSCK\nTX\n13\nRX\nUART RX\nNC\n5\nMISO\nSCL\n12\nNC\nNC\n6\nMOSI\nSDA\n11\nNC\nPower Supply\n3.3V\n7\n3.3V\n5V\n10\n5V\nPower Supply\nGround\nGND\n8\nGND\nGND\n9\nGND\nGround"}]},{"type":"heading","level":3,"children":[{"type":"text","value":"ONBOARD SETTINGS AND INDICATORS"}]},{"type":"paragraph","children":[{"type":"text","value":"Label\nName\nDefault\nDescription\nLD1\nPWR\n-\nPower LED Indicator\nJP1\nVDD1 SEL\nLeft\nLogic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V\nJ1\nJ1\nPopulated\nJumper for adding a 120Ω load to the RS485 receiver\nR4, R5, R14, R15\nR4, R5, R14, R15\nUnpopulated\nBiasing Resistors for Bus Idle Fail-Safe"}]},{"type":"heading","level":3,"children":[{"type":"text","value":"RS485 ISOLATOR 3 CLICK ELECTRICAL SPECIFICATIONS"}]},{"type":"paragraph","children":[{"type":"text","value":"Description\nMin\nTyp\nMax\nUnit\nSupply Voltage\n3.3\n-\n5\nV\nIsolated-Side Power Supply\n3\n-\n5.5\nV\nData Rate\n-\n500\n-\nkbps\nESD Protection\n-\n±15\n-\nkV"}]},{"type":"heading","level":3,"children":[{"type":"text","value":" "}]}]} - summary:The RS485 Isolator 3 Click Board™ is the perfect solution for electrical isolation and signal conditioning in RS485 communication systems. This compact add-on board features the advanced ADM2763E transceiver from Analog Devices, ensuring reliable communication even in the most challenging environments.
The ADM2763E is a 500kbps, 5.7kV RMS, signal-isolated RS-485 transceiver protected against electrostatic discharge (ESD) events on the RS485 A, B, Y, and Z pins. With protection against ≥±12 kV contact and ≥±15 kV air IEC 61000-4-2 ESD events, this Click board™ ensures maximum reliability and durability.
In addition to receiver/driver control pins, the ADM2763E also features a receiver cable invert pin that quickly corrects the reversed cable connection on the A and B receiver bus pins. This maintains complete receiver fail-safe performance, making it ideal for use in a wide range of industrial and automation applications.
The RS485 Isolator 3 Click Board™ is supported by a mikroSDK-compliant library, which simplifies software development and allows for seamless integration with your system. This Click board™ is a fully tested product that is ready for use on any system equipped with the mikroBUS™ socket.
Invest in the best for your RS485 communication system. Order your RS485 Isolator 3 Click Board™ today and enjoy reliable, high-performance communication that is built to last.