TTL TO RS485 Module (MAX-RS485)
$2.401pcs
The TTL to RS485 module converts TTL-level signals into RS485 differential signals, enabling reliable long-distance communication. It is suitable for industrial control, embedded systems, and serial communication applications.
| Dimensions | 42.8 × 15.2 mm |
|---|---|
| Brand |
easyelecmodule |
3477 in stock
TTL TO RS485 Module
3.3V/5.0V Auto-Direction Control RS485 Module Specifications
I. Core Features
Automatic Direction Control: No need for software-controlled “Receive-Transmit” pins. Operating this module is as simple as using a standard UART serial port.
Wide Voltage Compatibility:
Power Compatibility: Compatible with both 3.3V and 5.0V power supplies.
Signal Compatibility: TTL signal levels are compatible with both 3.3V and 5.0V systems.
Industrial-Grade Reliability:
High-quality chips and industrial-grade design ensure strong anti-interference capability.
Operating temperature range: -40°C to +85°C.
Enhanced lightning protection design for RS485, suitable for industrial fields and harsh outdoor environments.
Transmission Distance: Supports distances up to kilometers (tested with 850 meters of 2*1.5 cable. Recommended for use within 800 meters; beyond 800 meters, a repeater is required).
Schematic Diagram of TTL TO RS485 Module
II. Hardware Design
PCB Process:
Half-hole process design, board thickness 0.8mm, easily used as a sub-board or with terminals soldered.
Large-area copper coating to prevent signal interference.
Standard 2.54mm pitch pin header design for convenient secondary development.
Protection Design:
Equipped with a dedicated “Ground Connection” terminal. For long-distance outdoor transmission, connecting this terminal to earth provides excellent anti-interference and lightning protection. For short-distance indoor transmission, this connection can be omitted.
Termination Resistor: Onboard 120Ω matching resistor. Enable by shorting the R0 terminals. Recommended for long-distance transmission to ensure signal stability.
III. Functions and Interfaces
Bus Capability: Supports multi-device communication, allowing connection to a bus with up to 128 devices.
Hot-Swap Support: Supports hot-swapping without signal latch-up issues common in other RS485 chips.
Status Indicators: Equipped with RXD and TXD signal indicators for visual monitoring of data transmission and reception status.
IV. Key Advantages
Ease of Use: Automatic direction control makes operating RS485 as simple as using a UART serial port.
High Compatibility: Fully compatible with both 3.3V and 5.0V power and signal systems.
Robust Reliability: Industrial-grade design with lightning protection and anti-interference, suitable for harsh environments.
Flexible Design: Half-hole, terminals, and standard-pitch pin headers support various installation and development needs.
TTL TO RS485 Module PCB
TTL TO RS485 Module Pinout
Shipping Cost
We only ship to the United States. Shipping costs are calculated based on the total order amount.
Shipping Method And Delivery Time
All orders will be processed and shipped within 72 hours of placing the order (excluding weekends and holidays). They will ship from Shenzhen, China, primarily via 4PX logistics. Depending on the destination and logistics conditions, other carriers such as DHL, FedEx, UPS, USPS, etc., may also handle the delivery. Estimated shipping time is 7-12 business days, with actual delivery occurring in 10-17 business days, depending on logistics conditions.
Payment:
We accept Visa, Master card, Maestro, American Express, JCB, Dinner's Club, Discover, Paypal, Apple Pay, Google Pay .
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