Mikroelektronika d.o.o.
Carte d'isolateur RS485 3 Click
Carte d'isolateur RS485 3 Click
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Key Features:
- Faibles émissions rayonnées, fonction intelligente d'inversion du câble du récepteur, protection ESD sur les broches de bus RS485 A, B, Y et Z, débit de données faible vitesse de 500 kbps, entrées d'alimentation flexibles, compatible PROFIBUS® pour 5 V VDD2, récepteur intégré à sécurité intégrée pour la condition de ralenti du bus, permet d'ajouter une charge de 120 Ω au récepteur RS485, et plus encore
- Basé sur l'émetteur-récepteur RS-485 isolé du signal ADM2763E - 5,7 kV RMS d'Analog Devices
- Peut être utilisé pour de nombreuses applications industrielles et d'automatisation qui nécessitent une isolation contre des tensions de fonctionnement de 1060 V RMS et 1500 V CC pendant toute la durée de vie de l'appareil
- mikroBUS : interface UART
Présentation de l'isolateur RS485 3 Click Board™
La carte RS485 Isolator 3 Click Board™ est la solution idéale pour l'isolation électrique et le conditionnement du signal dans les systèmes de communication RS485. Cette carte complémentaire compacte est dotée de l'émetteur-récepteur avancé ADM2763E d'Analog Devices, garantissant une communication fiable même dans les environnements les plus difficiles.
Fonctionnalités avancées pour des performances fiables
L'ADM2763E est un émetteur-récepteur RS-485 500 kbps, 5,7 kV RMS, isolé du signal, protégé contre les décharges électrostatiques (ESD) sur les broches RS485 A, B, Y et Z. Avec une protection contre les événements ESD de contact ≥±12 kV et ≥±15 kV dans l'air IEC 61000-4-2, cette carte Click™ garantit une fiabilité et une durabilité maximales.
En plus des broches de commande du récepteur/pilote, l'ADM2763E dispose également d'une broche d'inversion de câble de récepteur qui corrige rapidement la connexion de câble inversée sur les broches de bus du récepteur A et B. Cela maintient les performances de sécurité totale du récepteur, ce qui le rend idéal pour une utilisation dans une large gamme d'applications industrielles et d'automatisation.
Intégration complète du système avec mikroSDK
La carte Click Board™ RS485 Isolator 3 est prise en charge par une bibliothèque compatible mikroSDK, qui simplifie le développement logiciel et permet une intégration transparente avec votre système. Cette carte Click Board™ est un produit entièrement testé et prêt à l'emploi sur tout système équipé de la prise mikroBUS™.
Procurez-vous votre carte RS485 Isolator 3 Click Board™ dès aujourd'hui
Investissez dans le meilleur pour votre système de communication RS485. Commandez votre RS485 Isolator 3 Click Board™ dès aujourd'hui et profitez d'une communication fiable et performante, conçue pour durer.
How Does The RS485 Isolator 3 Click Board™ Work?
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.
SPECIFICATIONS
| 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 |
PINOUT DIAGRAM
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 |
ONBOARD SETTINGS AND INDICATORS
| 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 |
RS485 ISOLATOR 3 CLICK ELECTRICAL SPECIFICATIONS
| 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 |
Software Support
Software Support
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_inputRS485 Isolator 3 enable receiver input function. -
rs485isolator3_disable_receiver_inputRS485 Isolator 3 disable receiver input function. -
rs485isolator3_disable_outputRS485 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:
- MikroSDK.Board
- MikroSDK.Log
- Click.RS485Isolator3
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.
MIKROSDK
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.
Carte d'isolateur RS485 3 Click
Frequently Asked Questions
Ask a Question-
Is the RS485 Isolator 3 Click Board™ ready for use?
This Click board™ comes as a fully tested product, ready for use on a system equipped with the mikroBUS™ socket.
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Does this Click board™ come with a software library?
Yes, the RS485 Isolator 3 Click Board™ is supported by a mikroSDK-compliant library, which includes functions that simplify software development.
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What additional features does the RS485 Isolator 3 Click Board™ have?
The board includes receiver/driver control pins and a receiver cable invert pin. The invert pin allows for quick correction of reversed cable connections on the A and B receiver bus pins while maintaining complete receiver fail-safe performance.
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What protection does the ADM2763E offer?
The ADM2763E is protected against ≥±12 kV contact and ≥±15 kV air IEC 61000-4-2 electrostatic discharge (ESD) events on the RS485 A, B, Y, and Z pins.
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Which component is featured on this board?
This board features the ADM2763E, a 500kbps, 5.7kV RMS, signal-isolated RS-485 transceiver from Analog Devices.
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What is the RS485 Isolator 3 Click Board™?
The RS485 Isolator 3 Click Board™ is a compact add-on board designed to provide electrical isolation and signal conditioning for RS485 communication systems. It is suitable for various industrial and automation applications that require insulation against working voltages.