PLC to Control TRIAC using transistor DC

Hi, Friends,

>>Can we control TRIAC using transistor PNP or NPN. ? And if possible , let me know how can I control it.

If your triac is just a "standard" three-leg type and not an opto-isolated package, then use a Motorola (or equivalent) MOC3020 or MOC3041 opto-isolated triac as a trigger for the main triac. The data sheet shows how to connect it.

This was already asked and answered. See reply #10 here, and stay with the original thread:

http://www.plctalk.net/qanda/showthread.php?t=19753