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UART Serial TTL To RS232 B User Guide

Overview

TTL TO RS232 (B) is an industrial-grade rail-mounted electrically isolated TTL-to-RS232 serial converter.

Feature

  • Compatible with TTL/RS232 standard, converting the TTL signal into a balanced differential RS232 signal, supporting full-duplex communication.
  • Compatible with 3.3V ~ 5V TTL signal level, with anti-reverse connection and anti-over-voltage circuit on the power supply side.
  • Onboard unibody power supply isolation, provides stable isolated voltage and needs no extra power supply for the isolated terminal.
  • Onboard unibody digital isolation, allows signal isolation, high reliability, strong anti-interference, and low power consumption.
  • Onboard TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, and with lightning-proof and ESD protection.
  • Onboard protection diodes, ensure the current/voltage stable outputs, provide over-current/over-voltage protection, and improve shock resistance.
  • Onboard power supply screw terminal for 3.3V~5V DC input.
  • Industrial rail-mount ABS case design, small in size, easy to install, and cost-effective.

Parameters

ModelGalvanic isolated TTL To RS232 converter
Power PortPower supply3.3V ~ 5V
Interface ProtectionAnti-over-discharge, reverse-proof
Device interfaceCompatible with TTL / RS232 standard
TTL InterfaceInterfaceScrew terminal
Transmission distanceLess than 10m
Transmission modelPoint to point
RS232 InterfaceInterfaceScrew terminal
ProtectionTVS diode protection, anti-surge and ESD protection, power and digital isolation
Transmission DistanceAbout 15m
Transmission ModePoint-to-point
IndicatorPWRPower indicator, lights up red when the input voltage is detected
TXDTX indicator, lights up when the TTL port sends data
RXDRX indicator, lights up when the TTL port receives data
Product AppearanceCaseRail-mount ABS case, suitable for 35mm DIN rail
Dimensions91.6 × 58.7 × 23.3mm

Primary Function

Convert the TTL signal into RS232 signal, which can be used for interface conversion and can also be used to extend the communication distance.


Interface Introduction


TOP SIDE SCREW TERMINALBOTTOM SIDE SCREW TERMINAL
VCCPower Input
DC 3.3V~5V power supply
SGNDRS232 Signal Ground
GNDGround / TTL signal ground
TXDTTL transmit data pinTXDRS232 transmit data pin
RXDTTL receive data pinRXDRS232 receive data pin

Communication Connection Diagram

TTL convert to RS232, point-to-point, full-duplex communication, suitable for interface conversion


Two groups TTL To RS232 conversion, point-to-point, full-duplex communication, suitable for extending the communication distance of TTL



Dimensions


Hardware Test

Test Note

Test Environment: PC (Windows).
Accessories required for testing:

  • TTL TO RS232 (B) —— This product
  • USB TO TTL - not included
  • PC (if your PC does not feature the RS232 interface, you can choose USB to RS232 (female socket male pin) for adapter test)

Test Hardware Connection

Connect the RS232 interface of TTL TO RS232 (B) to the PC through the serial port cable or the USB to RS232 cable, connect the TTL interface of TTL TO RS232 (B) to the TTL interface of USB TO TTL, and then connect the USB port of USB TO TTL to the same PC for the self-transmission test. The schematic diagram of the hardware connection is as follows:


Software Operation

  • Open two SSCOM interfaces.
  • Select two corresponding COM ports.
  • Select the baud rate as 115200, input the characters to be sent, select "Show Time and Packet" to view it more intuitively, and then click on "Open COM".


  • In these two SSCOM interfaces, select Send Every 100ms, and you can see the effect.


Resource

FAQ

 Answer:

Tested to work stably with baud rate up to 1M.


Support

Monday-Friday (9:30-6:30) Saturday (9:30-5:30)

Mobile: +86  13434470212

Email: services01@spotpear.com

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