RS485 Interface Board
RS-485 Board provides an interface between the TTL/CMOS logic levels commonly used on microcontrollers and the RS-485 bus.
Description
Description:
RS-485 Board provides an interface between the TTL/CMOS logic levels commonly used on microcontrollers and the RS-485 bus. This RS-485 Board to communicate through the RS-485 interface via the standard UART bus pins: RX and TX. The RS-485 board utilizes the ST485BDR.
HOW DOES IT WORK?
The main component of the RS-485 board is the ST485BDR, a – 7 V to 12 V common mode low power, RS-485 transceiver. This IC used to bridge between the CMOS/TTL signal levels and RS-485 bus.
SPECIFICATIONS
| Type | Bemenet |
| Applications | Simple solution for adding RS-485 connectivity to your device |
| Compatibility | Z-POE-Base panel |
| Interface | GPIO, UART |
| Board size | 41×44 mm |
| Input voltage | 5V |
PINOUT DIAGRAM
| Notes | Pin | Connector | Pin | Notes | |||
| OUTPUT 2 | IO-2 | 1 | IO | IO | 2 | IO-1 | OUTPUT 1 |
| NC | NC | 3 | NC | NC | 4 | NC | NC |
| NC | NC | 5 | NC | NC | 6 | NC | NC |
| TX | TX | 7 | TX | RX | 8 | RX | RX |
| GND | GND | 9 | GND | EN | 10 | EN | RX ENABLE |
| ADC INPUT | ADC ID | 11 | ADC | ADDR | 12 | ADDRESS | ADDRESS SW |
| Ground | GND | 13 | GND | GND | 14 | GND | Ground |
| NC | NC | 15 | NC | 5V | 16 | 5V | 5V |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
| LD1 | RX | – | Receive LED indicator |
| LD2 | TX | – | Transmit LED indicator |
| J1 | J1 | – | Switch on 120 Ohm for impedance suiting |
| X1 | X1 | – | RS-485 output (5V,A,B,GND) |
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