Dick Morley, the "father" of the PLC explained in a recent exclusive interview, "Our design philosophy was simple; put a bunch of relays in a box!" At the time, Morley was working at Bedford ...

"This programming accessory is part of the Modicon M171/M172/M173 range, a control offer for HVAC/Pumping applications." "This accessory is a programming stick for M171 Optimized logic controllers and ...