M5Stack M5Stamp RS485 Module SP485EEN-L/TR RS485 Transceiver

Resources:Documents
Compact 3.3V TTL to RS485 Expansion Board with 924V Power Input
The M5Stack S001 Stamp PWR485 is a compact RS485 communication expansion board designed to convert a microcontrollers 3.3V TTL UART signals into differential signals compatible with the RS485 electrical standard. Built around the SP485EEN-L/TR transceiver, it provides a practical way to add RS485 connectivity to embedded controllers for industrial communication, sensor acquisition, and Modbus-based applications.
The board provides two parallel RS485 interface connections, allowing two external devices to share the same RS485 bus connection. Its PWR485 interface accepts 924V DC input and uses an onboard DC-DC converter to generate 5V for the module and connected host circuitry. The compact 20 23 mm footprint supports multiple integration methods, including SMT, DIP, and flying-lead installation, while the high-temperature protective shell supports reflow soldering up to 230C.
Key Features

SP485EEN-L/TR RS485 transceiver
Converts 3.3V TTL UART signals to RS485 differential signals
3.3V input logic level
2 parallel RS485 interfaces
Supports connection of two devices on the same RS485 bus
PWR485 interface supports 924V DC input
Integrated DC-DC step-down circuit
Provides 5V power for the module and host device
Recommended baud rates: 9600 bps and 115200 bps
Maximum tested baud rate: 128000 bps
Low operating current
Red power indicator LED
Compact minimum-system expansion-board design
Supports SMT mounting
Supports DIP mounting
Supports flying-lead integration
High-temperature protective plastic shell
Supports reflow soldering temperature up to 230C
Suitable for RS485 sensor networks and Modbus communication
Arduino development support available

Applications

RS485 communication interfaces
Modbus device communication
Industrial sensor data acquisition
Embedded controller expansion
Industrial automation nodes
Building automation systems
Distributed sensor networks
Energy-monitoring systems
Factory equipment communication
Remote instrumentation
MCU-to-RS485 conversion
IoT gateway development

Model Size

Package Includes:

1 x Stamp PWR485
1 x HT3.96-4P female socket
2 x HY2.0-4P female sockets (blue + white)
1 x L-shaped hex key 1.5mm (compatible with M2 screws)