Zest_Sensor_4-20mA
Overview
The Zest_Sensor_4-20mA is an electronics development board for 6TRON open source platform built around the ADS131A04 from Texas Instruments.
The ADS131A04 specifications include:
-
Four-channel, simultaneously sampling analog-to-digital converter
-
Delta-Sigma (ΔΣ) converter topology
-
24-bit resolution (~18-bit resolution @ 2.5kHz)
-
Data rate up to 125kHz
-
Internal or external reference and oscillator
-
Differential or pseudo-differential inputs
On-board 4.5V precision reference and 25.000MHz TCXO oscillator.
Pseudo-differential converter input voltage range: 0-4.5V
12 to 48V supply voltage for the sensors through 6TRON Bus and I/O connectors
Selectable input conditioning for current mode (4-20mA) or voltage (0-5V or 0-10V) sensor interface
The Zest_Sensor_4-20mA offers 6TRON users an analog-to-digital converter (ADC) for data acquisition, instrumentation, measurement applications.
Specifications
STSAFE-A110 features:
- Secure boot
- Firmware update
- Usage monitoring
- Pre-loading of Sigfox™ or LoRaWAN® identifiers
- Unique serial number
- Active shield
- Monitoring of environmental parameters
- Fault injection & side channel attacks protection
- Operating Temperature Range: -40 to +105°C
- I2C (@0x20) Interface
| Feature | Details |
|---|---|
| Connectivity | 4 x 5-pin headers for sensor interface (power + data) 80-pin 6TRON header |
| Conditioning | Current mode: 4-20mA Voltage mode: 0-5V or 0-10V |
| Board size | 80 x 39 mm |
| Power Supply | 12 to 48V from stack recommended for sensor supply 5.2 to 12V from stack for board supply |
| Category | Zest_Sensor |
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_Sensor_4-20mA 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 | - |
| Reset (alternate) | DIO8 | 9 | 10 | VIN_EN | - |
| SPI Chip Select (alternate) | DIO7 | 11 | 12 | DIO9 | - |
| DRDY (alternate) | DIO6 | 13 | 14 | DIO10 | - |
| - | MD | 15 | 16 | DIO11 | - |
| Reset | DIO5 | 17 | 18 | DIO12 | - |
| 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 | DRDY (alternate) |
| - | VB_OUT | 29 | 30 | DIO14 | SPI Chip Select (alternate) |
| - | DAC1 | 31 | 32 | DIO15 | Reset (alternate) |
| - | ADC4 | 33 | 34 | DIO16 | - |
| - | ADC3 | 35 | 36 | DIO17 | - |
| - | ADC2 | 37 | 38 | DIO18 | - |
| - | ADC1 | 39 | 40 | GND | - |
| - | EXT_NRST | 41 | 42 | GND | - |
| - | DIO4 | 43 | 44 | VREF | - |
| - | DIO3 | 45 | 46 | DIO19 | - |
| - | DIO2 | 47 | 48 | DIO20 | - |
| DRDY | DIO1 | 49 | 50 | DIO21 | - |
| - | WKUP | 51 | 52 | DIO22 | - |
| - | ICAPT | 53 | 54 | DIO23 | - |
| - | PWM3 | 55 | 56 | DIO24 | - |
| - | PWM2 | 57 | 58 | DIO25 | - |
| - | PWM1 | 59 | 60 | DIO26 | - |
| SPI Chip Select | SPI1_SS | 61 | 62 | DIO27 | - |
| SPI Clock | SPI1_SCK | 63 | 64 | DIO28 | - |
| SPI MISO | SPI1_MISO | 65 | 66 | DIO29 | - |
| SPI MOSI | SPI1_MOSI | 67 | 68 | DIO30 | - |
| - | UART1_TX | 69 | 70 | DIO31 | - |
| - | 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_Sensor_4-20mA 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_Sensor_4-20mA is expressed in points representing the environmental impact of an average European per year.
Eco-score details
BOM
| Component | data | unit |
|---|---|---|
| Passive electronic component | 0,23 | g |
| Active electronic component | 0,02 | g |
| LED | 0,00 | g |
| Components(average) | 0,01 | g |
| Connectors Switchs | 3,67 | g |
| Logique type integrated circuit | 0,38 | g |
| Memory type integrated circuit | 0,00 | 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 |