TTL to RS485 Galvanic Isolated Converter (C)

This converter is designed for converting TTL signals to RS485 signals, supporting half-duplex communication. It has a TTL signal level of 3.3V to 5V and provides over-voltage protection. The compact, immersion gold design with castellated holes makes integration easy, and it features multiple protections, including a self-recovery fuse, a TVS diode for surge and spike suppression, and is lightning-proof. It is ideal for expanding nodes and long-distance communication and it supports transmission distances up to 1.2km and up to 32 nodes. Features

* Compatible with TTL/RS485 standard, converting the TTL signal into differential RS485 signal, supports half-duplex communication

* Compatible with 3.3V ~ 5V TTL signal level, provides over-voltage protection for power supply interface

* Unibody power supply isolation, provides stable isolated voltage and needs no extra power supply for the isolated terminal

* Unibody digital isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption

* TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, lightning-proof & anti-electrostatic

* Self-recovery fuse and protection diodes, provide the current/voltage stable outputs, provide over-current/over-voltage protection, improve shockproof performance

* RS485 output terminal 120R resistor, enabled via soldering

* Black immersion gold process design, compact size, easy to integrate

Specifications

Power Supply Interface Power supply 3.3V ~ 5V

Protection Over-voltage

Device Port Compatibility TTL/RS485 standard compatible

TTL Transmission distance Less than 10m

Transmission mode Point-to-point

RS485 Protection 200W lightning-proof and surge-suppress, 6KV ESD protection

Terminal resistor 120R, enabled via soldering

Transmission Distance About 1.2km

Transmission Mode Point-to-multipoint (up to 32 nodes, it is recommended to use repeaters for 16 nodes or more)

Appearance Dimensions 42.8 x 15.2 x 4.75mm

Resources

* Product Wiki

Pinout

Indicators

R (RXD) RX indicator lights up when the TTL port receives data

T (TXD) TX indicator lights up when the TTL port sends data

PWR The power indicator lights up when there is a power supply connection and voltage is detected

Left Side Interface

PE RS485 signal ground

B- RS485 differential signal B-

A+ RS485 differential signal A+

Right Side Interface

GND Ground / TTL signal ground

RXD TTL receive data pin

TXD TTL transmit data pin

VCC Power Input

DC 3.3V~5V power supply

Package Contents

* 1x TTL TO RS485 Converter