For example a one port adapter is much smaller than a four port adapter. However mostly the physical size of the USB to serial adapter is actually the least important feature, more importantly are the electrical features of the adapter. More about that later. Other differences are that some adapters has a female DB9 port instead of a male DB9 serial port.
Some have thumb screws for attaching the DB9 connector to a device while others have screw nuts for connecting devices. Most USB to Serial adapters has a DB9 connector however some adapters has a screw terminal header instead, this applies to industrial adapters and converters in particular. One of our favorite features of the USB to serial adapter is the type of adapter which have indication lights for the TX and RX communication lines.
This is a very helpful feature when troubleshooting. Okay, but how about the inside of the adapter? Here are some of the benefits that USB ports have over serial ports:. A traditional serial port is capable of mov ing data at speeds of 1Mbps to 10 Mbps, whereas USB Type C can transfer data at speeds of up to 10, Mbps a whopping x increase in speed.
USB Gen 1 is capable of transferring data at speeds of up to 12 Mbps, which is still much faster than serial ports, and USB Gen 2 is capable of transferring data at speeds of up to Mbps. USB 3. That said, USB 3. Also, it is important to mention that all generations of USB Type - A are cross-compatible with a nother. For example, if you plug a USB 3.
This is so because even though they are compatible, you are limited by USB 2. Ultimately, USB ports have become the standard port for consumer-grade uses and industrial applications because there was a need for a communication port that offered increased bandwidth. For example, machine vision cameras and fingerprint readers are not possible with legacy serial ports. This is so because they require bandwidth that exceeds that offered by serial ports.
As such, industrial computers can be configured with both USB and Serial COM ports for communication with both legacy and new technologies.
The legacy serial ports can be used to connect to older automation devices or sensors, while modern equipment such as high-resolution cameras can be connected via USB ports. The second advantage that USB ports have over serial ports is that they are capable of delivering power via USB, whereas Serial ports are not capable of providing power. That said , USB 1.
Furthermore, USB ports come equipped with a power management feature for connected devices that allows the system to put devices that are not currently in use to sleep, conserving power. This feature can also instantly wake up a device when the device is needed , reducing the overall power consumption of the system.
The serial end has a DB9 connector, which plugs into the serial device. The data that are transmitted by the serial device are sent directly to the USB port, where it is passed to software to interpret it. Each adapter cable is sold with a driver CD, which must be installed before the cable is used. The software creates a virtual serial port.
Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. Computer Hardware. How Serial Ports Work. By: Jeff Tyson. UART Needed " ". The Serial Connection " ". Carrier Detect - Determines if the modem is connected to a working phone line. Receive Data - Computer receives information sent from the modem. Transmit Data - Computer sends information to the modem.
Data Terminal Ready - Computer tells the modem that it is ready to talk. Signal Ground - Pin is grounded. Data Set Ready - Modem tells the computer that it is ready to talk. Request To Send - Computer asks the modem if it can send information. Clear To Send - Modem tells the computer that it can send information.
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