adccommunitymod (AutomationDirect) asked a question.
Created Date: August 26,2011
Created By: LBM
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Does any one have experience interfacing a 205PLC to the standard Wiegand card reader interface. The Wiegand interface is a standard interface for security/access control systems. Simply put, the interface is two TTL data-lines that upon presentation of a access card to a reader, provide a 1 or 0 bit stream on the respective data-line. The bit length varies, 26 to 64 in standard. The format of the bits varies by vendor. I don't have a problem with the bit manipulation, once a have the bits in V-Memory. Reading the data pulses is the problem. The standard pulse width is around 50 micro-seconds wide, spaced 1-2mini-second apart. I have found a modbus unit from Barix ( http://www.barix.com ) model X8. Does any one have any experience with this type of application? Thank-you..........
Created Date: August 26,2011
Created by: bcarlton
From quick reading I doubt that you can just bring the Wiegand data lines directly into the PLC. I found this discussion . I currently have an Arduino and it is an inexpensive way to create an interface. Wiegand -> Arduino -> RS232 -> PLC.
An interesting project.
Created Date: August 26,2011
Created by: LBM
Additional information
Thanks
There are a number of Wiegand to RS-232 interfaces in the market and HID sells RS-232 readers. However, I am looking at connecting 16 readers for 16 workstations. I believe the 205 is limited to 9 port?
Created Date: August 26,2011
Created by: LBM
Does any one have experience interfacing a 205PLC to the standard Wiegand card reader interface.
The Wiegand interface is a standard interface for security/access control systems. Simply put, the interface is two TTL data-lines that upon presentation of a access card to a reader, provide a 1 or 0 bit stream on the respective data-line. The bit length varies, 26 to 64 in standard. The format of the bits varies by vendor. I don't have a problem with the bit manipulation, once a have the bits in V-Memory. Reading the data pulses is the problem. The standard pulse width is around 50 micro-seconds wide, spaced 1-2mini-second apart.
I have found a modbus unit from Barix ( http://www.barix.com ) model X8.
Does any one have any experience with this type of application?
Thank-you..........