Overview Reviews Product Description PDK Access Control - Heavy Duty Relay 12 or 24volts. Used with PDK to activate Roller Door & Gate Motors Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × PDK PDK Access Control - Heavy Duty Relay 12 or 24volts. Used with PDK to activate Roller Door & Gate Motors Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments