TTL TO RS485 Module
Price range: $2.10 through $5.301pcs
| Dimensions | N/A |
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easyelecmodule |
What is TT L TO RS485 Module
Here are several classic TTL to RS485 modules
MCU TTL to RS485 Module - Automatic Bidirectional
I. Electrical Parameters
Communication Distance: Long-distance transmission can reach up to thousands of meters.
Signal Rate: Up to 500Kbps.
ESD Protection: 15KV ESD protection.
Operating Temperature: -40°C to +85°C.
Bus Load: Receiver input impedance of 1/4 unit load, allowing connection to a bus with up to 128 devices.
II. Chip Features
Equipped with a limited slew rate driver, which minimizes EMI and reduces signal reflection caused by improperly terminated and matched cables.
Can be hot-swapped without the signal latching phenomenon.
III. Protection and Filtering Design
Power Filtering: The power supply uses chip tantalum capacitors and dual capacitors for high and low-frequency power filtering.
Overvoltage Protection: Uses dual transient voltage suppressor (TVS) 600W diodes, providing better overvoltage protection performance.
Signal Protection: Uses 100-ohm current protection resistors and has serial input protection. The chip design improves the integrity of 485 signals.
IV. PCB Design
All RS485 and TTL signals are routed on a single side to ensure signal quality and enhance signal integrity.
Large-area copper cladding is used to prevent signal interference.
V. Interfaces and Mounting
Has terminals and welding lead holes, facilitating debugging and wiring of the final version. Welding leads can improve signal reliability.
Has 2.54-pitch perfboard welding holes, facilitating your secondary development.
Has M3 screw holes, making installation convenient and reliable.
VI. Configuration Function
Has a 120-ohm terminal resistor. Shorting the SET point can enable the terminal resistor (when the line length is 200 meters, enabling this resistor makes the signal more stable and reduces the bit error rate).
VII. Indicators
Has an RXD signal indicator.
MCU TTL to RS485 Module – Automatic Bidirectional Pinout:
RS485 Module TTL TO RS485 Module
MAX485 Module / 485 Module
1. Onboard MAX485 chip, a low-power, limited slew rate transceiver for 485 communication.
2. Onboard 5.08mm pitch 2P terminal block for convenient 485 communication wiring.
3. All chip pins are led out, which can be controlled and operated by a microcontroller.
4. Operating voltage: 5V
5. Board size: 44*14mm
TTL TO RS485 Module Schematic Diagram
TTL TO RS485 Size:
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:
TTL to RS485 Module with Hardware Automatic Flow Control and Terminal Blocks
Product Features
This module fully incorporates lightning protection and anti-interference design for RS485 buses, offering high EMC (Electromagnetic Compatibility) and EMI (Electromagnetic Immunity) performance. For long-distance outdoor transmission, connecting the module’s “Earth Ground” terminal to earth provides excellent anti-interference and lightning protection, ensuring greater safety for the RS485 bus. For short-distance indoor transmission, grounding is optional.
Standard 2.54-pitch pin headers facilitate secondary development.
Features a 120-ohm matching resistor; shorting R0 enables the resistor (recommended for long-distance transmission).
Supports multi-device communication, with at least 40 nodes connectable on the same network.
Supports hot-swapping without signal latch-up issues.
Anti-interference routing and copper coating prevent signal disruption.
Equipped with wiring terminals and silicone wires for ease of use.
Includes RXD and TXD signal indicators for clear monitoring of transmission and reception status.
Delivers high EMC and EMI performance.
Product Parameters
Wide voltage supply range (3.0V–30V), with an absolute maximum voltage of 33V (recommended operation within 30V). Minimum operating voltage must be above 2.8V.
Compatible with both 3.3V and 5.0V signals, ensuring seamless module matching.
Utilizes original chips and industrial-grade design for strong anti-interference capability.
Incorporates robust RS485 lightning protection, suitable for industrial sites and harsh outdoor environments.
Operating temperature: -40°C to +85°C.
Transmission distance: 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).
Baud rate: 110–256,000 bps.
Demo Video
TTL TO RS485 Product Preview
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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