Features:
- Self-powered from USB.

Complete includes:
- One USB to RS485 module

Dimensions:
40 mm / 17 mm

Links:
Drivers - http://www.ftdichip.com/Drivers/VCP.htm

Drivers are available to work with the following operating systems :
Windows Vista x64, Windows XP x64, Windows Server 2003 x64,
Windows Vista, Windows XP, Windows Server 2003, Windows 2000,
Windows ME, Windows 98, Linux, Mac OS X, Mac OS 9, Mac OS 8,
Windows CE.NET (Version 4.2 and greater)

The drivers listed above are all available to download for free from the FTDI website. Various 3rd Party Drivers are also available for various other operating systems - see the FTDI website for details.

A general purpose USB Relay board (controller) for connection to a PC's USB port using VCP (Virtual COM port). A low-cost solution to read RFID 125 kHz transponder tags and cards. The USB RFID Reader can be used in a wide variety of hobbyist and commercial applications, including access control, automatic identification, payment systems....

Manufacturer:
KMtronic LTD

Features:
• Fully assembled and tested.
• Powered from USB
• Communication: 9600 bps serial through virtual USB COM port
• LED and Buzzer indication
• The RFID reader is designed to work with all EM41xx/EM42xx family 125 kHz RFID tags including cards, buttons, capsules, disks, key fobs, and other compatible chips
• FT232RL chip for USB to Serial converter

Typical Applications:
• Access control
• Automatic identification
• Robotics
• Inventory tracking
• Payment systems
• Industrial automation

Drivers are available to work with the following operating systems:
Windows Server 2008 R2, Windows 7, Windows 7 x64, Windows Server 2008,
Windows Server 2008 x64, Windows Vista, Windows Vista x64, Windows Server 2003,
Windows Server 2003 x64, Windows XP, Windows XP x64, Windows 2000, Windows ME,
Windows 98, Linux, Mac OS X, Mac OS 9, Mac OS 8, Windows CE.NET (Version 4.2 and greater)

Read Distance:
2 ~ 7 cm (dependant on tag)

Communication Parameters:
8 Data, 1 Stop, No Parity
Baud rate : 9600

Output:
3 bytes tag number in HEX format
Example number: A3E142
Converted in DEC format is 0010740034

A general purpose Relay board for connection to a PC's USB port using VCP (Virtual COM port). Control devices using your PC. USB Relay controller allows a PC to control external devices using simple RS232 commands. Relay is fully powered from the USB bus.

Manufacturer:
KMtronic LTD

Complete including:
One USB relay board

Dimensions:
KMTronic_8Relay_Dimension.pdf

Relay specifications:
Relays have Normally Open (NO) and
Normally Closed (NC) Contacts each capable
of switching max:
- 12VDC/15A
- 24VDC/15A
- 125VAC/15A
- 250VAC/10A

Relay datasheed:
www.info.kmtronic.com/manuals/RAS.pdf

Supply:
Required power 12VDC/1000mA

Operation Range:
0°C to +80°C

Drivers :
Are available to work with the following operating systems :
All Windows systems, Linux, Mac OS X, Mac OS 9, Mac OS 8,
Windows CE.NET (Version 4.2 and greater), Raspberry Pi, Arduino ADK, Arduino with USB Host Shield

Communication Parameters:
8 Data, 1 Stop, No Parity
Baud rate : 9600

Commands:
FIRST chanel commands:
OFF command : FF 01 00 (HEX) or 255 1 0 (DEC)
ON command : FF 01 01 (HEX) or 255 1 1 (DEC)
...
...
...
EIGHT chanel commands:
OFF command : FF 08 00 (HEX) or 255 8 0 (DEC)
ON command : FF 08 01 (HEX) or 255 8 1 (DEC)
NOTE : Each command consists in 3 binary bytes (shown in hexadecimal below) without any space!

Software Examples:
http://www.info.kmtronic.com/usb-rs232-rs485-relays.html

.

This converter provides two way serial communications signal conversion between the RS485 to and from a personal computer USB port using virtual serial COM port.