Zest_Interface_RS485_Isolated
Overview
The Zest_Interface_RS485_Isolated is an electronics development board for 6TRON open source platform based on MAX14859 transceiver from Maxim.
The MAX14859 is a full-duplex RS485 differential bus transceiver with 2 Drivers and 2 Receiver. It provides a galvanic isolation between the cable-side RS-485 and the UART-side of the device.
The board operates from a single 3.3V supply and features an on-board isolated power supply to power the secondary side of the circuit.
The Zest_Interface_RS485_Isolated offers 6TRON users a galvanically isolated RS485 interface to devices, systems and sensors communicating with low power over a long distance.
Specifications
MAX14859:
- Full-Duplex RS-85 Transceiver with Integrated Transformer driver
- Isolated 3.3V to 5V DC/DC converter
- Data Rate 25Mbps
- UART interface
| Feature | Details |
|---|---|
| Connectivity | 80-pin 6TRON header 2x 3-pin header |
| Board size | 80 x 39 mm |
| Power Supply | 3.3 to 12V from stack, 3.3V internal |
| Category | Zest_Interface |
Block Diagram
The graphics below gives an overview of the board features and connections.
80-pin 6TRON header
This table shows how the pinout on Zest_Interface_RS485_Isolated corresponds to the pinout on the 6TRON BUS connector (the latter shown in the two middle columns).
| Description | 6TRON function | Pin number | Pin number | 6TRON function | Description |
|---|---|---|---|---|---|
| - | VJACK | 1 | 2 | VJACK | - |
| - | VJACK | 3 | 4 | VJACK | - |
| - | VHV | 5 | 6 | VHV | - |
| - | VHV | 7 | 8 | VHV | - |
| DE (alternate) | DIO8 | 9 | 10 | VIN_EN | - |
| RE (alternate) | DIO7 | 11 | 12 | DIO9 | - |
| - | DIO6 | 13 | 14 | DIO10 | - |
| - | MD | 15 | 16 | DIO11 | - |
| - | DIO5 | 17 | 18 | DIO12 | UART Zest to core (alternate) |
| Ground | GND | 19 | 20 | GND | Ground |
| Ground | GND | 21 | 22 | GND | Ground |
| 6TRON Stack Power Supply | VIN | 23 | 24 | VIN | 6TRON Stack Power Supply |
| 6TRON Stack Power Supply | VIN | 25 | 26 | VIN | 6TRON Stack Power Supply |
| - | VB_EN | 27 | 28 | DIO13 | - |
| - | VB_OUT | 29 | 30 | DIO14 | - |
| - | DAC1 | 31 | 32 | DIO15 | - |
| - | ADC4 | 33 | 34 | DIO16 | - |
| - | ADC3 | 35 | 36 | DIO17 | - |
| - | ADC2 | 37 | 38 | DIO18 | UART core to Zest (alternate) |
| - | ADC1 | 39 | 40 | GND | - |
| - | EXT_NRST | 41 | 42 | GND | - |
| - | DIO4 | 43 | 44 | VREF | - |
| - | DIO3 | 45 | 46 | DIO19 | - |
| RE | DIO2 | 47 | 48 | DIO20 | - |
| DE | DIO1 | 49 | 50 | DIO21 | - |
| - | WKUP | 51 | 52 | DIO22 | - |
| - | ICAPT | 53 | 54 | DIO23 | - |
| - | PWM3 | 55 | 56 | DIO24 | - |
| - | PWM2 | 57 | 58 | DIO25 | - |
| - | PWM1 | 59 | 60 | DIO26 | - |
| - | SPI1_SS | 61 | 62 | DIO27 | - |
| - | SPI1_SCK | 63 | 64 | DIO28 | - |
| - | SPI1_MISO | 65 | 66 | DIO29 | - |
| - | SPI1_MOSI | 67 | 68 | DIO30 | - |
| UART core to Zest | UART1_TX | 69 | 70 | DIO31 | - |
| UART Zest to core | UART1_RX | 71 | 72 | DIO32 | - |
| - | I2C1_SDA | 73 | 74 | DIO33 | - |
| - | I2C1_SCL | 75 | 76 | DIO34 | - |
| - | CAN1_TX | 77 | 78 | DIO35 | - |
| - | CAN1_RX | 79 | 80 | DIO36 | - |
Software Support
The Zest_Interface_RS485_Isolated provides a demo example developed using Mbed OS. The board can run on Zest Core development boards.
Environmental impact
The Eco score of the Zest_Interface_RS485_Isolated is expressed in points representing the environmental impact of an average European per year.
Eco-score details
BOM
| Component | data | unit |
|---|---|---|
| Passive electronic component | 0,50 | g |
| Active electronic component | 0,04 | g |
| LED | 0,00 | g |
| Other component | 0,00 | g |
| Connectors Switchs | 2,94 | g |
| Logique type integrated circuit | 1,38 | g |
| Memory type integrated circuit | 0 | g |
| PCB | 3120 | mm² |
Consumption
| Low voltage electricity voltage France | ||
|---|---|---|
| Current | 20 | mA |
| Supply voltage | 5 | V |
| Autonomy | 100 | h |
| % use | 75 | % |
| Power | 0,0075 | kWh |