What is the price of the MAX485 RS-485 Module in Bangladesh?

The current price of the MAX485 RS-485 TTL Converter Module is ৳395. Please check the KathalTech product page for the latest price and availability.

What is the MAX485 RS-485 module used for?

The MAX485 module is used to convert TTL-level serial communication from a microcontroller into RS-485 differential communication for longer-distance and multi-node serial networks.

Can I use the MAX485 module with Arduino?

Yes. The MAX485 module can be used with compatible Arduino boards to add RS-485 communication capability.

Can the MAX485 module work with ESP32 and STM32?

Yes. It can be interfaced with compatible ESP32, STM32, and other microcontrollers that provide suitable serial communication and control signals.

What voltage does the MAX485 module require?

The supplied specification lists 5V DC as the operating voltage.

Is the MAX485 module half-duplex or full-duplex?

The module provides half-duplex RS-485 communication, meaning transmission and reception share the same differential bus.

What are DE and RE on the MAX485 module?

DE is the Driver Enable control for transmission, while RE controls the receiver. The microcontroller uses these signals to manage transmit and receive operation in the half-duplex RS-485 network.

What is the maximum communication speed of the MAX485 module?

The supplied specification lists a maximum data rate of up to 10 Mbps, although the practical speed depends on cable length, network conditions, wiring, and other factors.

What is the maximum RS-485 cable distance supported by this module?

The supplied specification lists a maximum bus length of approximately 1.2 km. Actual usable distance depends on baud rate, cable characteristics, network topology, termination, and electrical noise.

How many devices can be connected to an RS-485 network using this module?

The supplied specification lists support for up to 32 nodes on a shared RS-485 bus under suitable network conditions.

Does the MAX485 module support Modbus?

Yes. The hardware can be used as the physical-layer interface for protocols such as Modbus RTU when paired with appropriate microcontroller software.

Where can I buy the MAX485 RS-485 Module in Bangladesh?

You can purchase the MAX485 RS-485 TTL Converter Module from KathalTech, subject to current stock availability.

MAX485 RS-485 Module TTL to RS-485 Module For Arduino

Name: MAX485 RS-485 Module TTL to RS-485 Module For Arduino
Brand: KathalTech
SKU: max485-rs-485-module-ttl-to-rs-485-module-for-arduino
Price: 395.00 BDT
Availability: InStock
Rating: 5.0 (1 reviews)

0.0 (0 Reviews)

৳395.00

VAT inclusive; Computed calculations added locally.

MAX485 RS-485 Module is a TTL-to-RS-485 communication converter designed for long-distance, noise-resistant serial communication. It operates at 5V and supports half-duplex communication for Arduino, ESP32, STM32, Modbus, industrial automation, and multi-node communication projects.

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Overview

The MAX485 RS-485 Module TTL to RS-485 Converter provides a practical interface between microcontrollers using TTL-level UART signals and robust RS-485 differential communication networks. By converting single-ended serial data into differential A/B signaling, it is suitable for communication over longer cable runs and electrically noisy environments.

Based on a MAX485 transceiver, the module supports half-duplex communication and provides separate Driver Enable (DE) and Receiver Enable (RE) control lines. These pins allow a microcontroller to switch between transmitting and receiving data as required by the RS-485 bus.

The board includes a convenient 5.08mm 2-pin screw terminal for connecting the RS-485 A and B lines. It can be used in multi-node networks and is suitable for applications such as Modbus communication, industrial automation, remote sensors, robotics, building automation, and distributed monitoring systems.

For extended RS-485 networks, proper bus wiring and termination are important. A 120Ω termination resistor is commonly placed across the A and B lines at the physical ends of the bus to reduce signal reflections. The module is non-isolated, so additional protection or isolation may be necessary in environments exposed to significant electrical transients or ground potential differences.

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Verified Comments Listing

The MAX485 RS-485 Module TTL to RS-485 Breakout Board is designed to provide a simple interface between a microcontroller's TTL serial communication and an RS-485 differential bus.

RS-485 is widely used for applications where serial communication needs to travel farther or operate in environments with more electrical noise than conventional single-ended UART connections can reliably tolerate. This module makes it possible to connect Arduino, ESP32, STM32, and other compatible controllers to RS-485 devices and networks.

Key Features

MAX485-based RS-485 transceiver
TTL-to-RS-485 communication interface
Half-duplex operation
5V DC operating voltage
Up to 10 Mbps maximum data rate under suitable conditions
Supports multi-node RS-485 bus configurations
5.08mm 2-pin screw terminal for A/B bus connections
Separate DE and RE control pins
Compact breakout-board design
Suitable for Modbus and other RS-485 protocols

Typical Applications

This module can be used for:

Arduino RS-485 communication
ESP32 and STM32 communication projects
Modbus RTU networks
Industrial automation
Remote sensor networks
Robotics communication
Building automation
Smart agriculture systems
Access control systems
Distributed monitoring systems
Long-distance serial communication

DE and RE Control

The module operates in half-duplex mode, so the microcontroller needs to manage the transmitter and receiver enable signals appropriately.

DE: Enables the RS-485 driver when activated.
RE: Controls the RS-485 receiver and is typically enabled when receiving data.

The exact firmware logic depends on the microcontroller and communication library being used.

RS-485 Wiring

The RS-485 network uses differential A and B signal lines. For longer bus installations, proper cable routing and termination are important. A 120Ω termination resistor is commonly used across A and B at the physical ends of an RS-485 bus when required by the network topology.

Important Notes

Use a regulated 5V DC supply for the module.
This is a non-isolated RS-485 interface.
The stated maximum communication distance and data rate are dependent on cable type, baud rate, topology, termination, interference, and other installation conditions.
Do not assume that the maximum stated distance and maximum stated data rate can be achieved simultaneously.
Use suitable electrical protection or isolation when connecting the module to harsh industrial environments or systems with significant ground-potential differences.
Allow approximately 5% dimensional variation due to manufacturing and measurement tolerances.

Package Includes:

1 × MAX485 RS-485 Module TTL to RS-485 Converter Breakout Board

Note: Product images are for illustration purposes and may differ from the actual product.

Specification	Details
Product Type	TTL to RS-485 Converter Module
Transceiver IC	MAX485CSA
Communication Type	Half-Duplex RS-485
Operating Voltage	5V DC
Maximum Data Rate	Up to 10 Mbps, distance dependent
Maximum Bus Length	Up to approximately 1.2 km, depending on network conditions
Maximum Network Nodes	Up to 32 nodes
RS-485 Connection	A / B Differential Bus
Terminal Block	2-Pin, 5.08mm Pitch Screw Terminal
Control Pins	Driver Enable (DE) and Receiver Enable (RE)
Module Length	45 mm
Module Width	15 mm
Module Height	14 mm
Module Weight	Approximately 4 g
Shipment Weight	0.005 kg
Shipment Dimensions	6 × 3 × 2 cm