RS232 Shield For Arduino
SKU:DFR0258
INTRODUCTION
This RS232 shield is designed for the Arduino controller,and it can easily convert UART to RS232
interface.
The shield integrates DB9 connectors (female) that provide connection to various devices with RS232
interface. Also the RS232 headers will facilitate your connections and commissioning. It provides the
welding areas to make full use of extra space on it, which is highly convenient for prototyping. It
provides a run / program mode switch. When switched OFF, you'll be able to programme the Arduino
controller; When switched ON, you can use the shield normally. Gold immersion PCB. Long pins on the
back that are compatible with most Arduino controllers such as Uno, Mega, Leonardo.
As an alternative of RS232, RS485 provides more reliable way to transfer data at a longer distance. We
also have a RS485 shield (Arduino) for this scenario.
RS232 DB9 Pinout Diagram
RS-232 Maximum Cable Length
The maximum cable length for RS-232 is 50ft, but in practise depends on baud rate, cable
specific capacitance and ambient noise. The table below contains some rules-of-thumb from
experiments done by Texas Instruments years ago.
Baud rate Maximum range / cable length
19200
50ft
9600
500ft
4800
1000ft
What is RS232?
"In telecommunications, RS‐232 is a standard for serial communication transmission of data. It formally
defines the signals connecting between a DTE (data terminal equipment) such as a computer terminal,
and a DCE (data circuit‐terminating equipment or data communication equipment), such as a modem.
The RS‐232 standard is commonly used in computer serial ports. The standard defines the electrical
characteristics and timing of signals, the meaning of signals, and the physical size and pinout of
connectors. The current version of the standard is TIA‐232‐F Interface Between Data Terminal
Equipment and Data Circuit‐Terminating Equipment Employing Serial Binary Data Interchange, issued in
1997." From Wikipedia
Compability
Arduino UNO
Arduino UNO R3
Arduino Mega 1280/2560
SPECIFICATION
Voltage: +5V
16 digital IO port (including a I2C interface)
6 analog IO port and power
Operation and programming mode switch
Transceiver indicating LED
DB9 connectors (female), RS232 pins
Weldable area
Reset switch
Module size: 55mmx53mm (2.16"x2.08")
SHIPPING LIST
RS232 shield x1
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